Script | Spoken-Tutorial - User contributions [en]

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-07T08:16:31Z

DeepaVedartham:

Tutorial: Introduction to OpenFOAM.

Script : Rahul Joshi and Saurabh S. Sawant

Narration : Rahul Joshi

<div style="margin-left:0cm;margin-right:0cm;">Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing</div>

{| style="border-spacing:0;width:17cm;"
|-
| align=center style="background-color:#ffffff;border-top:1pt solid #000000;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:1pt solid #000000;padding:0.18cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * OpenFOAM stands for Open source Field Operation And Manipulation.
* It is an Open Source Computational Fluid Dynamics Software.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * OpenFOAM has an Object Oriented Programming Interface.
* It is licensed under GNU General Public Licence.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * OpenFOAM has a mesh generation tool called as blockMesh.
* It is used for structured meshing, small and easy grids.
* Mesh input is in form of a script and no GUI.
* It also has an Advanced Meshing tool called as snappyHexMesh.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * We can import mesh files from third party softwares like fluent, cfx by using these commands.
* This is useful for large and complex grids.
* We can also use arbitrary polyhedral mesh.

|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * There are various default boundary conditions which are available.
* Users can modify the existing boundary conditions according to their case.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | There are wide range of solvers available for: * Incompressible flows such as icoFoam
* Compressible flows such as sonicFoam
* Multiphase flows such as interFoam,
* Combustion - chemFoam,
* Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.

|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * Parallel processing is easy in OpenFOAM and supports OpenMPI.
* We can use 'n' number of processors.

|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * OpenFOAM results can be visualized using Paraview.
* OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * Commercial softwares are costly.
* Source code is not available.
* Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.

|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | We will now see some OpenFOAM applications-* Dam break simulation
* Moving Reference Frame simulation
* Arbitrary Mesh Interface
* Ship Propeller Simulation
* 3D Bluff body simulation
* Particle-tracking simulation

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * Watch the video available at this URL.
* It summarizes the Spoken Tutorial Project.
* If you do not have a good bandwidth you can download and watch it.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * Spoken Tutorials project is a part of Talk to a Teacher project.
* It is supported by the National Mission on Education through ICT, MHRD, Government of India.
* This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]
* More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | * Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.
* The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.

|-
|}
<div style="text-align:center;"></div>

OpenFOAM/C2/Basic-Post-Processing-using-ParaView/English

2019-08-01T12:27:58Z

DeepaVedartham: Created page with "<span style="color:#000000;">Tutorial </span>: Basic Post-Processing using ParaView Script : Subhasree Basu Narration : Deepa Vedartham Keywords: OpenFOAM-5, Velocity vecto..."

<span style="color:#000000;">Tutorial </span>: Basic Post-Processing using ParaView

Script : Subhasree Basu

Narration : Deepa Vedartham

Keywords: OpenFOAM-5, Velocity vectors, Stream lines, slice, clip, ParaView, Spoken Tutorial

{| style="border-spacing:0;width:17cm;"
|-
| align=center style="border-top:1pt solid #000000;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''Visual Cue'''
| align=center style="border:1pt solid #000000;padding:0.18cm;" | '''Narration'''
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 1 : Title
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Hello and welcome to the spoken tutorial on '''Basic Post-Processing using ParaView'''
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | In this tutorial, we will learn:* <span style="background-color:transparent;">S</span><span style="background-color:transparent;">ome basic visualization techniques in ParaView.</span>

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 3 : Learning Objectives
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Under this we will learn:# Variable Visualization
# Velocity vector Visualization
# Streamlines Visualization
# Slice and Clip filters

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 4 :

System Requirement
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To record this tutorial I am using* '''Ubuntu''' Linux Operating system '''16.04 LTS'''
* '''OpenFOAM '''version 4.1
* <span style="color:#000000;">'''ParaView '''</span><span style="color:#000000;">version</span><span style="color:#000000;">''' </span><span style="color:#000000;">5.0'''</span>

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 5 :

Pre-requisite
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To practice this tutorial, the user should have* Basic knowledge '''of Linux terminal commands'''
* Experience with simulating cases in OpenFOAM
* Working skills in '''ParaView'''

If not, please go through the previous OpenFOAM Spoken''' T'''utorials on this website:''' http://spoken-tutorial.org/'''
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 6 : Problem Statement-'''Variable Visualization'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | '''Variable Visualization'''* OpenFOAM has provided an inbuilt case file for '''pitzDaily'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 7 : Problem Statement-'''Variable Visualization'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Here we will:* focus on post-processing of the pitzDaily solution

* learn to '''visualize flow field''' variables like '''velocity, pressure, vorticity, etc'''
* learn to visualize''' velocity vector '''within the flow field

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Terminal >>

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | You can find the '''pitzDaily''' case file within the '''simpleFoam''' directory within '''OpenFOAM-4.0>tutorials '''directory

I have already copied this file in my work folder and run the simulation in my machine using '''simpleFoam'''

Now we will open this solved case file in the command terminal

Here I will type:

<div style="color:#000000;">'''cd /opt/openfoam4/tutorials/incompressible/simpleFoam/pitzDaily'''</div>

<div style="color:#000000;">To see the content inside this folder type:</div>

<div style="color:#000000;">'''ls'''</div>

<div style="color:#000000;">You will see all these files here</div>

<div style="color:#000000;">Now to post-process this simulation type:</div>

<div style="color:#000000;">'''paraFoam'''</div>

<div style="color:#000000;">in the command terminal.</div>

<div style="color:#000000;">This will open the ParaView window</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | ParaView Window >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To visualize the domain geomtery click '''Apply''' buttom.

This is on the top left corner of the '''Properties''' panel

This will show the domain geometry on the '''Graphic window'''

Now if you scroll down within the '''Properties''' panel

You will see the different types of '''Volume Field''' available for visualization

Here we will visualize the '''velocity field''' within the domain

For this check the '''U''' variable within the '''Volume Field'''

Please note that the '''U '''variable is available to visualization by default

Now go to the '''Tool Bar '''

Change the '''vtkBlockColors''' to '''U''' from the drop down options

This will show the initial flow conditions on the '''Graphic window'''

Now go to the '''Menu bar''' and click '''the lastFrame''' button

You can see the velocity field pattern of the '''converged solution'''

This will visualize the flow velocity field after 298 iterations

Thus we have learnt to visualize field variables in ParaView
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | ParaView Window >>

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | After this we will learn to visualize velocity vectors

To do this click on the '''Glyph filter''' on the '''Tool Bar'''

This will add a new component to the pipeline window

Now within the Glyph '''Properties''' panel make sure the * '''Glyph type''' is arrow
* '''Scale Mode''' is off
* '''Scaling Factor''' is 0.003

Keep the rest as default

Click '''Apply''' button on the top left corner of the '''Properties''' panel

You will see small velocity vectors visualized within the domain

You can now clearly see the circulation zone and magnitude of velocity.

Thus we have learned to create velocity vector in a flow field

After this close ParaView window.

Now let us go back to the next problem statement
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 8 : '''Problem Statement-Streamlines Visualization'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Streamlines Visualization* OpenFOAM has provided an inbuilt case file for flow over a '''motorBike'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 9 : '''Problem Statement-Streamlines Visualization'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Here we will:* focus on post-processing of the '''motorBike''' solution

* learn to create '''stream lines''' and view them in ParaView

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Terminal >>

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | You can find the '''motorBike''' case file in the '''simpleFoam''' directory within '''OpenFOAM-4.1>tutorials '''directory

I have already copied this file in my work folder. Then run the simulation using '''simpleFoam'''

Now open this solved case file in the command terminal

Here I will type:

cd ..

<div style="color:#000000;">'''cd motorBike'''</div>

<div style="color:#000000;">To see the content inside type:</div>

<div style="color:#000000;">'''ls'''</div>

<div style="color:#000000;">You will see all these files here</div>

<div style="color:#000000;">Now to post-process this simulation type:</div>

<div style="color:#000000;">'''paraFoam'''</div>

<div style="color:#000000;">in the command terminal.</div>

<div style="color:#000000;">This will open the ParaView window</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | ParaView Window >>

Visual Narration >>

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To visualize the domain geometry click '''Apply''' button on the top left corner of the '''Properties''' panel

To include the last iteration click on the '''lastFrame''' button on the '''Menu bar'''

Go to the '''Tool Bar''' and set the directional view to '''+Y'''

Change the '''vtkBlockColors''' to U from the drop down options

Now scroll down on the '''Properties panel''' to '''Opacity'''

Reduce the '''Opacity''' to make the domain transparent like this

You will be able to see the motor bike with the rider through the domain now

To create streamlines around the motor bike click on '''stream Tracer''' filter on the '''Tool Bar'''

This will add a new component within the '''Pipeline''' browser

Here in the '''Properties''' panel change the '''Point''' to '''(5 0 1) '''coordinates within '''Seeds section'''

This will change the location of the center of the stream lines

Now change the '''Number of Points''' to '''15'''

This show the number of stream lines you want to create

Change the '''Radius''' to '''1'''

This changes the radius of the stream line points

Keep the rest of the values as default

After all changes have been made click '''Apply''' on the '''Properties''' menu of the '''stream Tracer'''

You can see stream lines around the motor bike along with their magnitude.

Thus we have learned to create stream lines in ParaView

After this close the ParaView window.

We will go to the next problem statement.
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 10 : '''Problem Statement-Clip and Slice Filters'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | '''Clip and Slice Filters'''* OpenFOAM has provided an inbuilt case file for {{anchor|DdeLink1641993596885}} '''hotRadiationRoom'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 11 : '''Problem Statement-Clip and Slice Filters'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Here we will:* focus on post-processing of the '''hotRadiationRoom''' solution
* '''learn to '''use filters like''' clip '''and '''slice '''in ParaView

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Terminal >>

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To open the '''hotRadiationRoom''' case file

Go to the '''hotRadiationRoom''' tutorial in '''BuoyantSimpleFoam '''within''' heatTransfer case directory. You can find this within OpenFOAM-4.1>tutorials '''directory

I have already copied this file in my work folder and run the simulation using '''BuoyantSimpleFoam'''

Now open this solved case file in the command terminal.

Here I will type:

<div style="color:#000000;">'''cd /opt/openfoam4/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom'''</div>

<div style="color:#000000;">To see the content inside type:</div>

<div style="color:#000000;">'''ls'''</div>

<div style="color:#000000;">You will see all these files here</div>

<div style="color:#000000;">Now to post-process this simulation type:</div>

<div style="color:#000000;">'''paraFoam'''</div>

<div style="color:#000000;">in the command terminal.</div>

<div style="color:#000000;">This will open the ParaView window</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | ParaView Window >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | To visualize the domain geometry click '''Apply''' button on the top left corner of the '''Properties''' panel

This will show the domain geometry on the '''Graphic window'''

Now if you scroll down within the '''Properties''' menu

You will see the different types of '''Volume Field''' available for visualization

Here we will visualize the '''Temperature field''' within the domain

For this check the '''T''' variable within the '''Volume Field and click on Apply'''

Now go to the '''Tool Bar '''

Change the '''vtkBlockColors''' to '''T''' from the drop down options

This will show the initial flow conditions on the graphic window

Go to the '''Tool Bar''' and set the directional view to '''+Z'''

Now go to the '''Menu bar''' and click '''Play''' button

You can see the temperature field pattern of the '''converged solution'''

This will visualize the flow temperature field after 900 iterations

Now click and scroll on the '''Graphic''' window. You can clearly see the temperature gradient due to radiation near the hot object.

But we are unable to visualize the whole section.

Thus we need to get a sectional or planar view of the field.
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''ParaView Window >>'''

Visual Narration >>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | First we will learn to create a sectional view of the field

To do this, click on the '''clip''' filter on the '''Tool''' Bar

This will add a new component to the pipeline window

Now in the '''Properties''' panel select Y''' Normal'''

Scroll on the Graphic Window like this. Then shift the reference section to the middle of the hot box.

After this click '''Apply''' on the Properties panel

Now change the view direction to '''+Y''' on the '''Tool''' Bar

Thus you can see the sectional view of the temperature field

Now delete this filter to visualize the full domain from the '''Properties''' panel
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''ParaView Window >>'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Now we will learn to create a planar view of the field

To do this, click on the '''slice''' filter on the '''Tool''' Bar

This will add a new component to the pipeline window

Now in the Properties panel select '''Y Normal'''

Scroll on the '''Graphic''' Window like this.

Now change the view direction to '''+Z''' on the '''Tool''' Bar

Then shift the reference section to the middle of the hot box.

After this click '''Apply''' on the '''Properties''' panel

Now change the view direction to '''+Y''' on the '''Tool''' Bar

Thus you can see a plane section view of the temperature field
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;color:#000000;" | Close the ParaView window and switch to the slides
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;color:#000000;" | Close the ParaView Window.
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;color:#000000;" | Slide 12: Summary
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <div style="color:#000000;">Let us summarize.</div>

<div style="color:#000000;">In this tutorial, we learnt some '''Basic Post-Processing using ParaView'''</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;color:#000000;" | Slide 13: Summary
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Under this we have learnt to* <div style="color:#000000;">Visualize field variable</div>
* <div style="color:#000000;">Create Velocity Vectors</div>
* <div style="color:#000000;">Create Stream lines</div>
* <div style="color:#000000;">Use clip and slice filters</div>

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;color:#000000;" | Slide 14: Exercise
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <div style="color:#000000;">You can use the discussed utilities on other inbuilt case files.</div>

<div style="color:#000000;">This will help you understand the post-processing using ParaView better.</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | <div style="color:#000000;">Slide 15:</div>

<div style="color:#000000;">Forum to answer questions</div>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <div style="color:#000000;">Please post your timed queries in this forum.</div>

<div style="color:#000000;"></div>

<div style="color:#000000;"></div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | <div style="color:#000000;">Slide 16:</div>

<div style="color:#000000;">Forum to answer questions</div>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <span style="background-color:#ffffff;color:#000000;">Please post your general queries on </span><span style="background-color:#ffffff;color:#000000;">'''OpenFOAM'''</span><span style="background-color:#ffffff;color:#000000;"> in this forum.</span>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | <div style="color:#000000;">Slide 17:</div>

<div style="color:#000000;">Case Study Project</div>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <span style="background-color:#ffffff;color:#000000;">The </span><span style="background-color:#ffffff;color:#000000;">'''FOSSEE '''</span><span style="background-color:#ffffff;color:#000000;">team coordinates the </span><span style="background-color:#ffffff;color:#000000;">Case Study </span><span style="background-color:#ffffff;color:#000000;">project.</span>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | <div style="color:#000000;">Slide 18:</div>

<div style="color:#000000;">Lab Migration Project</div>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" |
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | <div style="color:#000000;">Slide 19:</div>

<div style="color:#000000;">Acknowledgement</div>

<div style="color:#000000;">http://spoken-tutorial.org</div>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | <div style="color:#000000;">The Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India</div>

<div style="color:#000000;">For more details, visit this website.</div>
|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;color:#000000;" | Thank You
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;color:#000000;" | This is Deepa Vedartham from IIT Bombay signing off. Thanks for watching.
|-
|}

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T12:26:12Z

DeepaVedartham:

Tutorial: Introduction to OpenFOAM.

Script : Rahul Joshi and Saurabh S. Sawant

Narration : Rahul Joshi

<div style="margin-left:0cm;margin-right:0cm;">Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing</div>

{| style="border-spacing:0;width:17cm;"
|-
| align=center style="background-color:#ffffff;border-top:1pt solid #000000;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:1pt solid #000000;padding:0.18cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Commercial softwares are costly. Source code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, Particle-tracking simulation.

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}
<div style="text-align:center;"></div>

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T12:24:02Z

DeepaVedartham:

Tutorial: Introduction to OpenFOAM.

Script : Rahul Joshi and Saurabh S. Sawant

Narration : Rahul Joshi

<div style="margin-left:0cm;margin-right:0cm;">Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing</div>

{| style="border-spacing:0;width:17cm;"
|-
| align=center style="background-color:#ffffff;border-top:1pt solid #000000;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:1pt solid #000000;padding:0.18cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Commercial softwares are costly. Source code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, Particle-tracking simulation.

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.18cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.18cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T06:31:13Z

DeepaVedartham:

Tutorial: Introduction to OpenFOAM.

Script : Rahul Joshi and Saurabh S. Sawant

Narration : Rahul Joshi

<div style="margin-left:0cm;margin-right:0cm;">Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing</div>

{| style="border-spacing:0;margin:auto;width:17cm;"
|-
| align=center style="background-color:#ffffff;border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:0.05pt solid #000000;padding:0.049cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Commercial softwares are costly. Source code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, Particle-tracking simulation.

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.049cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.049cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T06:26:52Z

DeepaVedartham:

Tutorial: Introduction to OpenFOAM.

Script : Rahul Joshi and Saurabh S. Sawant

Narration : Rahul Joshi

<div style="margin-left:0cm;margin-right:0cm;">Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing</div>

{| style="border-spacing:0;width:16.99cm;"
|-
| align=center style="background-color:#ffffff;border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:0.05pt solid #000000;padding:0cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Commercial softwares are costly. Source code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, Particle-tracking simulation.

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T06:23:53Z

DeepaVedartham:

Tutorial: '''Introduction to OpenFOAM.'''

'''Script : Rahul Joshi and Saurabh S. Sawant'''

'''Narration : Rahul Joshi'''

<div style="margin-left:0cm;margin-right:0cm;">'''Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing'''</div>

{| style="border-spacing:0;width:16.99cm;"
|-
| align=center style="background-color:#ffffff;border-top:0.25pt solid #000000;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border:0.25pt solid #000000;padding:0cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 6: Mesh Generation
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , and etc.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Commercial softwares are costly. Source code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, Particle-tracking simulation.

OpenFOAM spoken tutorial are available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:none;padding:0cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:none;border-bottom:0.25pt solid #000000;border-left:0.25pt solid #000000;border-right:0.25pt solid #000000;padding:0cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}

OpenFOAM/C2/Introduction-to-OpenFOAM/English

2019-08-01T06:19:03Z

DeepaVedartham: Created page with " Tutorial: '''Introduction to OpenFOAM.''' '''Script : Rahul Joshi and Saurabh S. Sawant''' '''Narration : Rahul Joshi''' <div style="margin-left:0cm;margin-right:0cm;">''..."

Tutorial: '''Introduction to OpenFOAM.'''

'''Script : Rahul Joshi and Saurabh S. Sawant'''

'''Narration : Rahul Joshi'''

<div style="margin-left:0cm;margin-right:0cm;">'''Keywords: Video tutorial, CFD, About OpenFOAM, Solvers , Parallel Processing'''</div>

{| style="border-spacing:0;width:16.99cm;"
|-
| align=center style="background-color:#ffffff;border-top:0.25pt solid #ed220b;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | '''Visual Cue'''
| align=center style="background-color:#ffffff;border-top:0.25pt solid #ed220b;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | '''Narration'''
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 1
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Hello and welcome to the spoken tutorial on Introduction to OpenFOAM.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 2: About OpenFOAM
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | OpenFOAM stands for Open source Field Operation And Manipulation. It is an Open Source Computational Fluid Dynamics Software.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 3: About OpenFOAM
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | A CFD tool box written in C++ and working on Linux operating systems.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 4: About OpenFOAM
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | OpenFOAM has an Object Oriented Programming Interface. It is licensed under GNU General Public Licence.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 5: OpenFOAM capability
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | OpenFOAM is a Finite Volume based CFD software using both structured and unstructured grid.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 6:<span style="color:#ff2600;"> </span><span style="color:#000000;">Mesh Generation</span>
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | OpenFOAM has a mesh generation tool called as blockMesh. It is used for structured meshing, small and easy grids. Mesh input is in form of a script and no GUI. It also has an Advanced Meshing tool called as snappyHexMesh.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 7:Importing Mesh Files
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | We can import mesh files from third party softwares like fluent, cfx by using these commands. This is useful for large and complex grids. We can also use arbitrary polyhedral mesh.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 8: Boundary Conditions
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | There are various default boundary conditions which are available. Users can modify the existing boundary conditions according to their case.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 9: Solvers
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | There are wide range of solvers available for: Incompressible flows such as icoFoam, Compressible flows such as sonicFoam, Multiphase flows such as interFoam, Combustion - chemFoam, Particle-tracking flows - coalChemistryFoam, Molecular Dynamics - mdFoam and<span style="color:#ff2600;"> </span>MHD flows and many more.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 10: Solvers
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Users can create their own solvers or they can modify the existing solvers
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 11: Parallel Processing
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Parallel processing is easy in OpenFOAM and supports OpenMPI.

We can use 'n' number of processors.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 12: Post-Processing
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | OpenFOAM results can be visualized using Paraview.

OpenFOAM data can also be visulalised in softwares such as Tecplot, Ensight , <span style="color:#000000;">and</span> etc.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 13: Equivalent to Commercial softwares
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Commercial softwares are costly. <span style="color:#000000;">Source</span> code is not available. Solver capabilities of OpenFOAM are as good as Fluent, CFX, Star CCM +, etc.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 14: Modelling in OpenFOAM
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Solver syntax in OpenFOAM is similar to that used in writing a Partial Differential Equation.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 15: OpenFOAM code
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | For example, Analytically Momentum Equation is written as shown.

Shown below is the OpenFOAM code equivalent for this equation
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 16-22: OpenFOAM Results
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | We will now see some OpenFOAM applications - Dam break simulation, Moving Reference Frame simulation, Arbitrary Mesh Interface, Ship Propeller Simulation, 3D Bluff body simulation, <span style="color:#000000;">Particle</span>-tracking simulation.

OpenFOAM spoken tutorial are<span style="color:#ff2600;"> </span>available on the spoken tutorial website.
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 23: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Watch the video available at this URL.

It summarizes the Spoken Tutorial Project.

If you do not have a good bandwidth you can download and watch it.
|-
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 24: About the Spoken Tutorial Project
| style="background-color:#ffffff;border-top:none;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 25: Spoken tutorial Workshops
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Spoken Tutorials project is a part of Talk to a Teacher project. It is supported by the National Mission on Education through ICT, MHRD, Government of India. This project is coordinated by [http://spoken-tutorial/ http://spoken-tutorial]

More information on this mission is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutori][http://spoken-tutorial.org/NMEICT-Intro al.org/NMEICT-Intro]
|-
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 26: Acknowledgement
| style="background-color:#ffffff;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #000001;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | References for the Video and images have been taken from these website.
|-
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #ed220b;border-left:0.25pt solid #ed220b;border-right:0.25pt solid #000001;padding-top:0.141cm;padding-bottom:0.141cm;padding-left:0.242cm;padding-right:0.141cm;" | Slide 27: Disclaimer

About the Author and Speaker
| style="background-color:#eeeeee;border-top:0.25pt solid #000001;border-bottom:0.25pt solid #ed220b;border-left:0.25pt solid #000001;border-right:0.25pt solid #ed220b;padding:0.141cm;" | Please make a note that this effort is not approved or endorsed by ESI Group, the producer of OpenFOAM software and the owner of the OpenFOAM trademark.

The script is written by Rahul Joshi and Saurabh Sawant and This is Rahul Joshi from IIT Bombay signing off.
|-
|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-30T06:01:21Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''

Now type '''cd space tutorials''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''

Now type '''cd space ras''' and press '''Enter'''

Now type''' ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off

Now type '''cd space cavity''' and press '''Enter'''

Now type''' ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''

The '''initial conditions''' are specified within the files in the ''''0'''' directory

Now let us take a look at the files in the ''''0'''' directory

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''

Now type '''ls''' and press '''Enter'''
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''

These files are to be kept as default until the '''inlet parameters''' don't change

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''

Let me clear this off

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder

To do this type '''cd space constant''' and press '''Enter'''

Now type '''ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''

Let us open these two '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''

Scroll down

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''

Scroll down

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file

It can be kept as it is

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''

We will keep the '''system''' folder default as there are no changes inside it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup

We can '''mesh''' the '''geometry'''

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''

'''Meshing '''has been done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''

The '''iterations''' running can be seen in the '''terminal''' window

It may take some time for the '''iterations''' to stop

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''

To visualize the results let us open the '''ParaView''' window

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''

This will open the '''ParaView''' window

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''

You can see the '''lid driven cavity geometry'''

A common visualization is '''surface plots'''

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to capital '''U'''

You can see the '''initial condition''' of '''velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the top of the '''ParaView''' window you can see the '''VCR control'''

Click on the '''Play''' button

You can see the motion of the fluid inside the '''cavity'''

You can also '''toggle''' on the '''colour legend''' from the left hand side top of '''ParaView active variable control menu'''

Click on it. You can see the colour '''legend'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracer'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed

To do this , scroll down

You can see the''' seed type'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible

Select any of these axis in which you would like to view the '''stream lines'''

I will select the '''Y axis''' and click '''Apply'''

You can see the '''streamlines''' along the Y axis

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''

Now delete this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''

To do this go to '''Filter > Data Analysis and Plot over line'''

Save the data as''' dot csv''' file from the file menu

Click on '''Save Data'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice

Now let me switch back to the slides

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to 100 100 1

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details please write to

contact at the rate spoken hyphen tutorial dot org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project

It is supported by the National Mission on Education through ICT, MHRD, Government of India

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Flow-over-a-flat-plate/English

2019-07-30T06:00:23Z

DeepaVedartham:

Tutorial: Flow over a flat plate using OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flat plate, Boundary layer, glyph (vector plotting).

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1
| Hello and welcome to the spoken tutorial on Flow over a flat plate using '''OpenFOAM'''

|-
| Slide 2 : Learning Objectives
| In this tutorial I will teach you about

* Geometry of the flat plate
* Changing the grid spacing in '''meshing'''
* Post Processing results in '''ParaView''' and
* Visualizing using '''Vector Plots'''

|-
| Slide 3:

System Requirement
| To record this tutorial

I am using
* '''Linux''' Operating system '''Ubuntu''' version 12.04
*'''OpenFOAM''' version 2.1.1 and
*'''ParaView''' version 3.12.0

|-
| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet
|

|-
| Slide 5: Flow over Flat Plate

|'''Flow over flat plate''' is a '''fundamental problem in fluid mechanics'''

|-
| Slide 6: Flow over Flat Plate

Flow over a flat plate diagram
| We can visualise the growth of the '''boundary layer'''

'''Boundary layer''' is a very thin region above the body

where the velocity is 0.99 times the '''free stream velocity'''

|-
| Slide 7: Diagram of boundary conditions.
| This is a '''diagram''' of the '''flow over the flat plate'''

The''' boundary conditions''' are given as follows

*You have the '''Inlet'''
*the '''Plate'''
*'''Top''' which is the '''Farfield'''
*and '''Outlet''' which is the''' pressure outlet boundary'''
|-
| Slide 8: Inlet parameters
|
* The Free stream velocity '''U is 1 m/s''', and

* we are solving this for a '''Reynolds number (Re) = 100'''

|-
| Click on home>> OpenFoam >> Run >> Tutorials >> Incompressible >> SimpleFoam
|Now let us Go to the '''Home''' folder, In the '''Home''' folder, click on the '''OpenFoam''' folder

Then go to the '''Run''' '''directory '''

You will see '''Tutorials. '''Click on it

'''Scroll down''' and then click on '''Incompressible'''

'''Scroll down'''

You will see the '''simpleFoam '''folder

Click on it

This '''solver''' suits our case

|-
| Right click >> Create new folder >> flatplate
| In this, create a '''folder''' by the name '''flatplate'''

Right click '''Create New Folder ''' '''flatplate'''

|-
| Double-click '''pitzdaily '''folder
| Now, let us open the '''pitzdaily case'''

|-
| Zoom in
| Let me zoom this.

|-
| Select '''0''', '''constant '''and '''system '''folders
| Copy the '''three folders''' '''0''', '''constant '''and '''system'''

|-
| Copy them
| Copy this

|-
| Go back to '''SimpleFoam''' >> '''flatplate '''folder

Paste them there
| Now let us go one level back

Paste these three '''folders''' inside the''' flatplate '''folder

|-
| Click on '''constant >> polyMesh'''
| Open the '''constant folder''' and then the '''polyMesh folder'''

|-
|
| Change the geometry and boundary condition names in the '''blockMeshDict '''file

|-
|
| I have already made the changes.

Let us open the '''blockMeshDict''' file . Scroll down

The geometry is in '''meters'''

|-
|
| We have set the '''dimensions''' of the '''flatplate'''

|-
| Simplegrading (1 3 1)
| You can see the '''simpleGrading '''

It is kept as (1 3 1) as we need a finer '''mesh''' near the plate

|-
|
| Now close this

Go two '''levels''' back

|-
|
| Similarly, make changes in the '''boundary condition''' names inside the '''files''' in the '''0''' folder

These '''files''' have '''pressure''' '''velocity''' and '''wall''' functions

|-
|
| To '''calculate''' the values of '''wall''' functions

please refer to the earlier '''tutorials''' in the '''OpenFoam''' series

Let us go one '''level''' back

|-
|
| The '''system''' folder can be kept '''default'''

Let us close this

|-
|Let us Open the terminal window :

Press Ctrl+Alt+t keys simultaneously
| Now let us open the '''terminal window'''

In the '''terminal window''', type '''run '''and press '''Enter'''

|-
| Type cd tutorials
| Now type '''cd space tutorials '' press''' Enter'''

|-
| Type cd incompressible
| Now type '''cd incompressible '''press''' Enter'''

|-
| Type cd simpleFoam
| Now type '''cd space simpleFoam '''press''' Enter'''

|-
| Type ls
| Now type '''ls''' and press '''Enter'''

|-
|
| We can see the '''flatplate''' folder.

|-
| Type cd flatplate
| Now type '''cd space flatplate '''and press '''Enter'''

|-
| Type ls
| Now type '''ls''' and press '''Enter'''

|-
|
| You can see the three '''folders''' '''0 constant''' and '''system'''

|-
| Type blockMesh
| Now, we will mesh the geometry.

We are using a '''course mesh''' for this problem

'''Meshing''' can be done by typing '''blockMesh''' in the '''terminal'''

|-
|
| Press '''Enter'''

'''Meshing''' has been done

|-
|
| Note that if there is some error in the '''blockMesh''' file

it will be shown in the '''terminal''' window

|-
| Type paraFoam
| To view the geometry, type “'''paraFoam'''”

And press '''Enter'''

|-
| Paraview window click on APPLY button on left hand side

| After the '''ParaView''' window opens, on the left hand side of the '''object inspector''' menu, click '''Apply'''

We can see the '''geometry'''

Close the '''ParaView''' window

Let me switch back to the''' slides'''

|-
| Slide 9: solver
| The solver we are using here is '''simpleFoam'''

'''SimpleFoam''' is a '''steady state solver '''for '''incompressible '''

and''' turbulent''' flows

|-
| Demo :

type simpleFoam
| Let me switch back to the '''terminal '''window

In the '''terminal window''' ,type '''simpleFoam''' and press '''Enter'''

You will see the '''iterations''' running in the '''terminal '''window

|-
| Type paraFoam
| Once the solving is done, type '''paraFoam''' to view the results

|-
| In the Paraview window click on APPLY button on left hand side
| On the left hand side of the '''Object Inspector''' menu, click '''Apply to '''view the geometry

|-
| Properties
| Scroll down the '''properties''' panel of the '''Object Inspector''' menu for '''time step''', '''regions''' and '''fields'''

|-
| Change the drop down menu from Solid Color to U
| To view the '''contours''' from the''' '''drop down menu,

in the '''Active Variable Control '''menu,

change from '''solid color''' to '''capital U'''

|-
|
| You can see the initial condition of the '''velocity'''

|-
| VCR control
| Now on top of the '''ParaView''' window, you will see the '''VCR''' control

|-
| Click on Play button of VCR control
| Click on the '''Play''' button

|-
|
| You will see the '''contour''' of '''Pressure''' or '''Velocity''' on the flat plate accordingly

|-
| Toggle on the '''Color legend'''
| This is the '''velocity contour'''

'''Toggle''' on the '''Color legend'''

|-
| Color legend left hand side top icon
| To do this, click on the '''color legend '''icon on the '''Active Variable Control''' menu

|-
| Click on APPLY button
| Click '''Apply''' in the '''Object inspector '''menu

|-
| Click on Display
| In the '''Object inspector '''menu, click on '''Display'''

|-
| Click on rescale to data range
|'''Scroll down''' and click on '''Rescale''' '''to data range'''

|-
| Shift color legend on top of the geometry
| Let me shift this '''Color legend''' on top

|-
| Top menu >> Filter > Common > glyph
| To visualize the '''Vector Plot''',

go to the '''Filters Menu''' > '''Common''' > '''glyph'''

|-
|
| Go to the '''Properties''' in '''Object Inspector menu'''

|-
|
| Click '''Apply''' on the left hand side of '''Object Inspector Menu'''

|-
| Changing vector size
| You can change the number of '''vectors''' by changing their size at the bottom

|-
| Scroll down and click on edit button

set scale factor 0.1
| Also, the size of the '''vectors''' can be changed by '''clicking''' on the '''Edit''' button

The '''set scale''' '''factor''' can be changed to '''0.1'''

|-
| Click the apply button
| Again, click the '''Apply''' button

|-
|
| Now let me zoom this

|-
| Click on ZoomToBox icon
| To do this, in the '''Active Variable Control '''menu, click on the '''zoomToBox '''option

|-
|
| And '''zoom''' over any area that you desire

|-
| Parabolic variation of vector plot
| We can see the '''parabolic variation''' of '''vector plots '''as the '''flow''' moves over the''' plate'''

|-
| Delete the vector plot
| Delete this. Now delete the '''vector plot'''

|-
| Corresponding to color of 1 in color legend
| Also, we can see that the color near to 1

corresponds to the '''velocity''' of '''0.99 '''times the free stream velocity

|-
| To plot the data along x and y axis
| We can also plot the '''variation''' of velocity along the '''x '''and '''y '''axes using the '''plot data over line'''

|-
| Slide 10: Summary
| This brings us to the end of the tutorial

In this tutorial we learnt :

* '''Geometry and meshing''' of the '''flat plate geometry''' and
* Vector plotting in '''ParaView'''

|-
| Slide 11: Assignment
| As an Assignment,

Create a '''geometry''' of '''flow over the flat plate'''

'''Refine the grid spacing''' near the plate

|-
| Slide 12 : About Spoken tutorials
|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| Slide 13: Spoken Tutorial Worekshops
| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact at the rate spoken hyphen tutorial dot org

|-
| Slide 14: Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 15: Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|

|-
| Slide 16: Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|

|-
| Slide 17: Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 18:

Acknowledgement

| Spoken Tutorial project is a part of the Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India

More information on this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| About the contributor
| This is Rahul Joshi from IIT BOMBAY signing off

Thanks for joining

|}

OpenFOAM/C3/Simulating-Hagen-Poiseuille-flow/English

2019-07-30T05:59:32Z

DeepaVedartham:

Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.

Script and Narration : Saurabh S. Sawant

Keywords: Video tutorial,CFD.

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1:

| Hello and welcome to the spoken tutorial on simulating '''Hagen-Poiseuille flow''' in '''OpenFOAM'''

|-
| Slide 2 : Learning Objectives

| In this tutorial we will see:

* To create and '''mesh 3D cylindrical pipe'''<br/>

* To '''simulate '''the '''Hagen-Poiseuille flow''' <br/> having''' fixed pressure ratio''' across '''boundaries'''<br/> and

* To visualize the '''velocity contour '''in '''ParaView'''

|-
| Slide 3: System Requirement

| To record this tutorial, I am using

*'''Linux Operating system Ubuntu '''12.04

*'''OpenFOAM version '''2.1.1 and

*'''ParaView''' '''version '''3.12.0

|-
| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet
|
|-
| Slide 5: Prerequisites

| To practice this tutorial learner should have the knowledge of

Basic '''Fluid Dynamics'''

and '''Hagen-Poiseuille''' '''flow'''

|-
| Slide 6:

Hagen-Poiseuille Flow Diagram

Read aloud the given points and show the contents in the diagram with the mouse pointer.
| Here is, '''Hagen-Poiseuille''' '''Flow''' Diagram

We can see the '''dimensions and boundaries''' of the pipe

'''Viscosity''' of the fluid used, that is, water is given

Pressure at the '''inlet''' is 20''' Pascals''' and at the '''outlet''' it is 0''' Pascals'''

As it is an '''incompressible flow''', only the pressure difference is of importance

|-
| Slide 7:

Formulas and Analytical Solution

Read aloud the given points
| '''Formulas and Analytical Solution:'''

For '''Hagen-Poiseuille flow,'''

'''Pressure drop''' along the pipe is:

('''P1 minus P2''') equals ('''32 mu Uaverage L''') upon ('''D square''')

By substituting the values from the previous diagram, we get,

'''Uaverage''' equals to 0.208 '''m/s'''

'''Maximum Velocity''' is given as,

Two times the '''average velocity''', which would be, 0.416''' m/s'''

'''Reynolds Number''' for the flow is,

'''Uaverage '''into '''D '''upon '''nu''', that comes out to be, '''2080'''

Hence, the flow is '''transient'''

|-
| Slide 8: Solver

| Type of solver used here is,

'''icoFOAM'''

It is a '''Transient Solver'''

It is used for '''incompressible, laminar flow of Newtonian fluid'''

|-
| Slide 9:

Pressure Boundary Conditions

| '''Pressure Boundary Conditions '''used,

At '''Inlet: fixedPressure'''

At '''Outlet: fixedPressure'''

At '''Walls: ZeroGradient'''

|-
| Slide 10:

Velocity Boundary Conditions

| '''Velocity Boundary Conditions''' used,

At '''Inlet: pressureInletVelocity'''

At '''Outlet: zeroGradient'''

At '''Walls: fixedValue'''

|-
| Show 3dpipe folder.

Show the 3dpipe folder
| For executing this case,

First, Let's create the '''case directory''' in the ''''icoFoam'''' folder

And Give it some name

I have named it as''' '3dpipe''''

|-
| Point the mouse pointer from lid driven folder to 3d pipe folder.
| To know the location of this folder, go through the tutorial on '''lid driven cavity'''

Copy this ''''0' (zero), 'constant'''' and ''''system'''' folders of '''lid driven cavity''' problem in the newly created folder.

|-
| Go inside the 3dpipe folder.
| Let's go inside the ''''3dpipe'''' folder

|-
| Hover the pointer over the folder inside the 3dpipe folder.
| I have already copied the folders into my ''''3dpipe'''' folder and modified the files in it

|-
| Go into the '0' folder and open P file and show it
| Now, let's go into the ''''0'''' folder

And open the ''''P'''' file

This is the''' pressure boundary condition''' file

|-
| Show the pressure boundary condition file and show the dimensions inside it.
| Note that the dimensions are in '''(meter square) per (second square)''' '''(m2/s2)'''

|-
| Show the pressure value written
| Hence the''' pressure '''value in '''pascals''' is divided by the '''density''', that is, 1000''' Kg/m3''' '''(Kg per meter cube),''' and written here.

|-
| Close the file
| Let's close the file

|-
| Open U file in the same folder and show
| File containing the '''velocity boundary condition '''is as seen:lets open the file we can see the '''velocity boundary condition ''' for inlet, outlet and fixed walls

|-
| Close the file and come out of the '0' folder
| Let's close the file and come out of the ''''0'''' folder

|-
| Switch back to the slides
| To see the '''blocking strategy''', let me switch back to the slides

|-
| Slide 11: Blocking Strategy

Hover the pointer on the geometry and drag it towards the z direction.
| To create a '''3D geometry''' of a pipe I have made a '''2D''' circular '''geometry '''and extruded the length in z direction

|-
| Point out the numbering pattern.
| Numbering Pattern is as shown. We can also see the dimension of the mesh

|-
| Minimize the slides
| To see the '''blockMeshDict''' file, let's minimize the slides

|-
| Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it.
| Let's go into the folder ''''constant',''' and then ''''polyMesh'''' lets open the'''blockMeshDict ' file. We can see the vertices, blocks,edges and boundaries for inlet, outlet and fixed walls

|-
| Close the file and come out of the folder 'polyMesh
| Let's close the file and lets come out of the ''''polyMesh'''' folder

|-
| Open and show transportProperties file and point at the value viscosity value
| We see the ''''transportProperties''''file. Lets open the file

Note the '''dynamic viscosity '''value, here, is 1 into 10 raise to minus 6

|-
| Close the file and come out of the 'constant' folder.
| Let's close the file and come out of the 'folder ''''constant'''

|-
| Go into the system folder and open the controlDict file. Show it.
| Let's go into the ''''system'''' folder

Now, let's have a look at the ''''controlDict'''' file

|-
| Show time step value
| The solution '''converges''' after 18 seconds therefore the final '''time step''' is kept 19.The '''time step''' has been set to 1 into 10 raise to minus 3

|-
| Close the file and the Home folder
| Let's close the file

Let's close the ''''Home'''' folder

|-
| Press 'control', 'alt' and 't' keys altogether
| Now to '''execute''' the case, we will, first, go inside the ''''3dpipe'''' folder through terminal.Let's open the terminal by pressing ''''control', 'alt' '''and''' 't'''' key, altogether

|-
| Type run and press Enter in the terminal.
| Type '''run''' and press '''Enter'''

|-
| Type cd (space) tutorials and press Enter
| Type '''cd''' '''(space) tutorials''' and press '''Enter'''

|-
| Type cd (space) incompressible and press Enter
| Type '''cd (space)''' '''incompressible''' and press '''Enter'''

|-
| Type cd (space) icoFoam and press Enter
| Type '''cd''' '''(space)''' '''icoFoam '''and press '''Enter'''

|-
| Type cd (space) 3dpipe and press Enter
| Type '''cd (space)''' '''3dpipe '''and press '''Enter'''

|-
| Type blockMesh and press Enter
| Now to create the '''mesh''', type '''blockMesh''' and press '''Enter'''

'''Meshing''' has been done

|-
| After the meshing is done, type icoFoam to start the iterations
| To start the '''iterations''' type '''icoFoam''' and press '''Enter'''

We see the '''iterations''' are running

|-
| After the iterations are done, type paraFoam for postprocessing the results and press Enter.
| Iterations has been done

After the '''iterations''' end type '''paraFoam''' for '''postprocessing''' the results and press '''Enter'''. It will open the" paraview". This is " paraview"

|-
| Click on Apply.
| Let's click on '''Apply''' on the left hand side of the '''Object inspector menu''' to see the''' geometry'''

|-
| Rotate the geometry by pressing the button of the mouse and move it in the required direction.
| Let's rotate the '''geometry''' for a better view

|-
| Click on the active variable control menu and select U in the drop-down menu
| Click on the '''active variable control menu''' and select '''U''' in the drop-down menu

|-
| Click on play button
| At the top, in '''VCR toolbar''', click on '''Play''' button

|-
| Go to Object Inspector menu, go to Display, click on Rescale data range
| Go to '''Object Inspector menu''', go to '''Display''', click on '''Rescale''' to '''data range'''

|-
| go to the toolbar named common, click on Clips and press Apply
| To view the half section, go to the toolbar named '''common''', click on '''Clips''' go to object inspector menu properties and press '''Apply'''. Lets Zoom in

|-
| Open the color legend
| Let's open the '''color legend'''

|-
|
| We can see the '''maximum velocity''' is near to the actual '''maximum velocity'''that is 0.40 meters per second

|-
| Go to Filters> Data Analysis> Plot Over Lines
| To view the graph Go to '''Filters'''at the top '''Data Analysis'''and press '''Plot Over Line'''

|-
| click on Y axis and press Apply
|Press '''Y''' axis and press '''Apply'''

|-
| Point towards the parabolic profile
| We can see the '''parabolic''' '''profile''' for '''Hagen-Poiseuille flow'''

|-
| Close the graph
| Let's close the '''graph'''

|-
| Close ParaView
| lets Close '''ParaView'''

|-
| Switch to the slides
|And switch to the''' slides'''

|-
| Slide 12: Summary
| In this tutorial we have learnt:

*To create and mesh '''3D pipe geometry
*To simulate '''Hagen-Poiseuille flow''' for a '''fixed pressure ratio'''across boundaries and
*To visualize the '''velocity''' results in '''Parafoam '''

|-
| Slide 13 : Assignment

| As an assignment,

Change the '''geometry parameters '''such as length and diameter

Change the corresponding '''pressure ratio''' and

Use the fluid of different '''viscosity'''

|-
| Slide 14: About Spoken tutorials

|
* Watch the video available at the following link

* It summarises the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

|-
| Slide 15: About Spoken tutorials

| The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to contact at spoken hyphen tutorial dot org

|-
| Slide 16: Forum to answer questions

* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 17: Forum to answer questions

* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|
|-
| Slide 18: Lab Migration project

* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 19: Case Study project

* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 20: Acknowledgement

| Spoken Tutorial Project is a part of the Talk to a Teacher project

* It is supported by the National Mission on Education through ICT, MHRD, Government of India

* More information on this Mission is available at

* spoken hyphen tutorial dot org slash NMEICT hyphen Intro
|}

OpenFOAM/C3/Flow-over-a-flat-plate/English

2019-07-30T05:45:48Z

DeepaVedartham:

Tutorial: Flow over a flat plate using OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flat plate, Boundary layer, glyph (vector plotting).

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1
| Hello and welcome to the spoken tutorial on Flow over a flat plate using '''OpenFOAM'''

|-
| Slide 2 : Learning Objectives
| In this tutorial I will teach you about

* Geometry of the flat plate
* Changing the grid spacing in '''meshing'''
* Post Processing results in '''ParaView''' and
* Visualizing using '''Vector Plots'''

|-
| Slide 3:

System Requirement
| To record this tutorial

I am using
* '''Linux''' Operating system '''Ubuntu''' version 12.04
*'''OpenFOAM''' version 2.1.1 and
*'''ParaView''' version 3.12.0

|-
| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet
|

|-
| Slide 5: Flow over Flat Plate

|'''Flow over flat plate''' is a '''fundamental problem in fluid mechanics'''

|-
| Slide 6: Flow over Flat Plate

Flow over a flat plate diagram
| We can visualise the growth of the '''boundary layer'''

'''Boundary layer''' is a very thin region above the body

where the velocity is 0.99 times the '''free stream velocity'''

|-
| Slide 7: Diagram of boundary conditions.
| This is a '''diagram''' of the '''flow over the flat plate'''

The''' boundary conditions''' are given as follows

*You have the '''Inlet'''
*the '''Plate'''
*'''Top''' which is the '''Farfield'''
*and '''Outlet''' which is the''' pressure outlet boundary'''
|-
| Slide 8: Inlet parameters
|
* The Free stream velocity '''U is 1 m/s''', and

* we are solving this for a '''Reynolds number (Re) = 100'''

|-
| Click on home>> OpenFoam >> Run >> Tutorials >> Incompressible >> SimpleFoam
|Now let us Go to the '''Home''' folder, In the '''Home''' folder, click on the '''OpenFoam''' folder

Then go to the '''Run''' '''directory '''

You will see '''Tutorials. '''Click on it

'''Scroll down''' and then click on '''Incompressible'''

'''Scroll down'''

You will see the '''simpleFoam '''folder

Click on it

This '''solver''' suits our case

|-
| Right click >> Create new folder >> flatplate
| In this, create a '''folder''' by the name '''flatplate'''

Right click '''Create New Folder ''' '''flatplate'''

|-
| Double-click '''pitzdaily '''folder
| Now, let us open the '''pitzdaily case'''

|-
| Zoom in
| Let me zoom this.

|-
| Select '''0''', '''constant '''and '''system '''folders
| Copy the '''three folders''' '''0''', '''constant '''and '''system'''

|-
| Copy them
| Copy this

|-
| Go back to '''SimpleFoam''' >> '''flatplate '''folder

Paste them there
| Now let us go one level back

Paste these three '''folders''' inside the''' flatplate '''folder

|-
| Click on '''constant >> polyMesh'''
| Open the '''constant folder''' and then the '''polyMesh folder'''

|-
|
| Change the geometry and boundary condition names in the '''blockMeshDict '''file

|-
|
| I have already made the changes.

Let us open the '''blockMeshDict''' file . Scroll down

The geometry is in '''meters'''

|-
|
| We have set the '''dimensions''' of the '''flatplate'''

|-
| Simplegrading (1 3 1)
| You can see the '''simpleGrading '''

It is kept as (1 3 1) as we need a finer '''mesh''' near the plate

|-
|
| Now close this

Go two '''levels''' back

|-
|
| Similarly, make changes in the '''boundary condition''' names inside the '''files''' in the '''0''' folder

These '''files''' have '''pressure''' '''velocity''' and '''wall''' functions

|-
|
| To '''calculate''' the values of '''wall''' functions

please refer to the earlier '''tutorials''' in the '''OpenFoam''' series

Let us go one '''level''' back

|-
|
| The '''system''' folder can be kept '''default'''

Let us close this

|-
|Let us Open the terminal window :

Press Ctrl+Alt+t keys simultaneously
| Now let us open the '''terminal window'''

In the '''terminal window''', type '''run '''and press '''Enter'''

|-
| Type cd tutorials
| Now type '''cd space tutorials '' press''' Enter'''

|-
| Type cd incompressible
| Now type '''cd incompressible '''press''' Enter'''

|-
| Type cd simpleFoam
| Now type '''cd space simpleFoam '''press''' Enter'''

|-
| Type ls
| Now type '''ls''' and press '''Enter'''

|-
|
| We can see the '''flatplate''' folder.

|-
| Type cd flatplate
| Now type '''cd space flatplate '''and press '''Enter'''

|-
| Type ls
| Now type '''ls''' and press '''Enter'''

|-
|
| You can see the three '''folders''' '''0 constant''' and '''system'''

|-
| Type blockMesh
| Now, we will mesh the geometry.

We are using a '''course mesh''' for this problem

'''Meshing''' can be done by typing '''blockMesh''' in the '''terminal'''

|-
|
| Press '''Enter'''

'''Meshing''' has been done

|-
|
| Note that if there is some error in the '''blockMesh''' file

it will be shown in the '''terminal''' window

|-
| Type paraFoam
| To view the geometry, type “'''paraFoam'''”

And press '''Enter'''

|-
| Paraview window click on APPLY button on left hand side

| After the '''ParaView''' window opens, on the left hand side of the '''object inspector''' menu, click '''Apply'''

We can see the '''geometry'''

Close the '''ParaView''' window

Let me switch back to the''' slides'''

|-
| Slide 9: solver
| The solver we are using here is '''simpleFoam'''

'''SimpleFoam''' is a '''steady state solver '''for '''incompressible '''

and''' turbulent''' flows

|-
| Demo :

type simpleFoam
| Let me switch back to the '''terminal '''window

In the '''terminal window''' ,type '''simpleFoam''' and press '''Enter'''

You will see the '''iterations''' running in the '''terminal '''window

|-
| Type paraFoam
| Once the solving is done, type '''paraFoam''' to view the results

|-
| In the Paraview window click on APPLY button on left hand side
| On the left hand side of the '''Object Inspector''' menu, click '''Apply to '''view the geometry

|-
| Properties
| Scroll down the '''properties''' panel of the '''Object Inspector''' menu for '''time step''', '''regions''' and '''fields'''

|-
| Change the drop down menu from Solid Color to U
| To view the '''contours''' from the''' '''drop down menu,

in the '''Active Variable Control '''menu,

change from '''solid color''' to '''capital U'''

|-
|
| You can see the initial condition of the '''velocity'''

|-
| VCR control
| Now on top of the '''ParaView''' window, you will see the '''VCR''' control

|-
| Click on Play button of VCR control
| Click on the '''Play''' button

|-
|
| You will see the '''contour''' of '''Pressure''' or '''Velocity''' on the flat plate accordingly

|-
| Toggle on the '''Color legend'''
| This is the '''velocity contour'''

'''Toggle''' on the '''Color legend'''

|-
| Color legend left hand side top icon
| To do this, click on the '''color legend '''icon on the '''Active Variable Control''' menu

|-
| Click on APPLY button
| Click '''Apply''' in the '''Object inspector '''menu

|-
| Click on Display
| In the '''Object inspector '''menu, click on '''Display'''

|-
| Click on rescale to data range
|'''Scroll down''' and click on '''Rescale''' '''to data range'''

|-
| Shift color legend on top of the geometry
| Let me shift this '''Color legend''' on top

|-
| Top menu >> Filter > Common > glyph
| To visualize the '''Vector Plot''',

go to the '''Filters Menu''' > '''Common''' > '''glyph'''

|-
|
| Go to the '''Properties''' in '''Object Inspector menu'''

|-
|
| Click '''Apply''' on the left hand side of '''Object Inspector Menu'''

|-
| Changing vector size
| You can change the number of '''vectors''' by changing their size at the bottom

|-
| Scroll down and click on edit button

set scale factor 0.1
| Also, the size of the '''vectors''' can be changed by '''clicking''' on the '''Edit''' button

The '''set scale''' '''factor''' can be changed to '''0.1'''

|-
| Click the apply button
| Again, click the '''Apply''' button

|-
|
| Now let me zoom this

|-
| Click on ZoomToBox icon
| To do this, in the '''Active Variable Control '''menu, click on the '''zoomToBox '''option

|-
|
| And '''zoom''' over any area that you desire

|-
| Parabolic variation of vector plot
| We can see the '''parabolic variation''' of '''vector plots '''as the '''flow''' moves over the''' plate'''

|-
| Delete the vector plot
| Delete this. Now delete the '''vector plot'''

|-
| Corresponding to color of 1 in color legend
| Also, we can see that the color near to 1

corresponds to the '''velocity''' of '''0.99 '''times the free stream velocity

|-
| To plot the data along x and y axis
| We can also plot the '''variation''' of velocity along the '''x '''and '''y '''axes using the '''plot data over line'''

|-
| Slide 10: Summary
| This brings us to the end of the tutorial

In this tutorial we learnt :

* '''Geometry and meshing''' of the '''flat plate geometry''' and
* Vector plotting in '''ParaView'''

|-
| Slide 11: Assignment
| As an Assignment,

Create a '''geometry''' of '''flow over the flat plate'''

'''Refine the grid spacing''' near the plate

|-
| Slide 12 : About Spoken tutorials
|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| Slide 13: Spoken Tutorial Worekshops
| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact(at the rate)spoken(hyphen)tutorial(dot)org

|-
| Slide 14: Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 15: Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|

|-
| Slide 16: Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|

|-
| Slide 17: Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 18:

Acknowledgement

| Spoken Tutorial project is a part of the Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India

More information on this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| About the contributor
| This is Rahul Joshi from IIT BOMBAY signing off

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-30T05:29:48Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''

Now type '''cd space tutorials''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''

Now type '''cd space ras''' and press '''Enter'''

Now type''' ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off

Now type '''cd space cavity''' and press '''Enter'''

Now type''' ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''

The '''initial conditions''' are specified within the files in the ''''0'''' directory

Now let us take a look at the files in the ''''0'''' directory

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''

Now type '''ls''' and press '''Enter'''
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''

These files are to be kept as default until the '''inlet parameters''' don't change

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''

Let me clear this off

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder

To do this type '''cd space constant''' and press '''Enter'''

Now type '''ls''' and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''

Let us open these two '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''

Scroll down

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''

Scroll down

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file

It can be kept as it is

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''

We will keep the '''system''' folder default as there are no changes inside it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup

We can '''mesh''' the '''geometry'''

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''

'''Meshing '''has been done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''

The '''iterations''' running can be seen in the '''terminal''' window

It may take some time for the '''iterations''' to stop

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''

To visualize the results let us open the '''ParaView''' window

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''

This will open the '''ParaView''' window

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''

You can see the '''lid driven cavity geometry'''

A common visualization is '''surface plots'''

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to capital '''U'''

You can see the '''initial condition''' of '''velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the top of the '''ParaView''' window you can see the '''VCR control'''

Click on the '''Play''' button

You can see the motion of the fluid inside the '''cavity'''

You can also '''toggle''' on the '''colour legend''' from the left hand side top of '''ParaView active variable control menu'''

Click on it. You can see the colour '''legend'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracer'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed

To do this , scroll down

You can see the''' seed type'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible

Select any of these axis in which you would like to view the '''stream lines'''

I will select the '''Y axis''' and click '''Apply'''

You can see the '''streamlines''' along the Y axis

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''

Now delete this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''

To do this go to '''Filter > Data Analysis and Plot over line'''

Save the data as''' dot csv''' file from the file menu

Click on '''Save Data'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice

Now let me switch back to the slides

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to 100 100 1

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details please write to

contact(at the rate)spoken(hyphen)tutorial(dot)org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project

It is supported by the National Mission on Education through ICT, MHRD, Government of India

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-30T05:19:26Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Now type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Now let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to capital '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-30T05:13:48Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Now type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Now let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T13:03:41Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Now type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Now let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T13:01:43Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Now type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T13:00:13Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T12:58:35Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T12:57:59Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T12:56:55Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1''' and
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note - this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T12:56:29Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1'''
* And '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note - this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-29T12:54:03Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1'''
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note - this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''The simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default as there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

We can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualization is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid colour''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click on the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''colour legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to visualise the '''stream lines'''

*On top of the menu bar of '''ParaView'''
*Go to '''Filters > Common and Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the centre of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis and Plot over line'''.

Save the data as''' dot csv''' file from the file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number , Re is equal to 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* And visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials project is a part of the Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-07-28T07:35:41Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent case''' in '''OpenFOAM''' and
* Plotting '''streamlines''' in '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu version 12.04'''
* '''OpenFoam version 2.1.1'''
* '''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''
* Knowledge of how to solve '''flow''' in a '''Lid driven cavity'''
* If not so please refer to the relevant tutorial on our website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary conditions''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial.

Please make a note - this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory.

The '''boundary conditions''' are the '''Lid velocity U is 1 m/s'''

And we are solving this for a '''Reynolds number Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Type cd tutorials

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' window type '''run''' and press '''Enter'''.

Now type '''cd space tutorials''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd space incompressible''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls

Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

In this you will see two folders '''les''' and '''ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd space ras''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity

ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''cavity''' folder. Let me clear this off.

Type '''cd space cavity''' and press '''Enter'''.

Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders

Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders ''' 0, constant''' and '''system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

Type ls

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, in the '''command terminal''' type '''cd 0''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|Point to the files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see files named as '''epsilon, k, nut, nutilda, p, R''' and '''U'''.

These files are to be kept as default until the '''inlet parameters''' don't change.

If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd space dot dot''' and press '''Enter'''.

Let me clear this off.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant

Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us open the '''constant''' folder.

To do this type '''cd space constant''' and press '''Enter'''.

Now type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing
*the geometry of the '''case''' inside '''blockMeshDict'''
*and the '''fluid properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties'''.

Let us open these two '''files'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter'''.

Scroll down.

'''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter'''.

Scroll down.

'''Simulation type model''' for this '''case''' is kept as '''RASModel'''.

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties model'''.

To do this, in the '''terminal''' type '''gedit transportProperties '''and press '''Enter'''.

The '''transportModel '''we are using here is '''Newtonian '''and '''Viscosity''' is kept as '''1 e raise to -4'''

Close this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the '''geometry''' in this '''case'''.

So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file.

It can be kept as it is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''cd space dot dot''' and press '''Enter'''.

We will keep the '''system''' folder default ss there are no changes inside it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, we are done with the setup.

Now we can '''mesh''' the '''geometry'''.

To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter'''.

'''Meshing '''has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can '''run''' the '''solver'''.

To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter'''.

The '''iterations''' running can be seen in the '''terminal''' window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running will stop at the end of the '''time step'''.

To visualize the results let us open the '''ParaView''' window.

To do this in the '''terminal''' type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''.

You can see the '''lid driven cavity geometry'''.

A common visualisation is '''surface plots'''.

Change the display to '''Surface''' in the column and from the drop down menu change from '''solid color''' to '''U'''

You can see the '''initial condition''' of '''velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the '''ParaView''' window you can see the '''VCR control'''.

Click the '''Play''' button.

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle''' on the '''color legend''' on the left hand side top of '''ParaView active variable control menu'''.

Click on it. You can see the colour '''legend'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To visualise the '''stream lines'''

*On the top menu bar of '''ParaView'''
*Go to '''Filters > Common > Stream Tracers'''
*Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it.

You can see the '''stream lines''' at the center of the '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed.

To do this , scroll down.

You can see the''' seed type.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me shift this to the right and change from''' point source''' to '''line source'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

Click on the X axis

Delete this.

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X, Y''' and '''Z axes''' which are visible.

Select any one of these axis in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''.

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and plot '''streamlines''' along the '''X axis'''.

Now delete this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the '''velocity''' along the '''X''' and '''Y''' axis using '''plot over line'''.

To do this go to '''Filter > Data Analysis > Plot over line'''.

Save the data as''' .(dot) csv''' file from file menu.

Click on '''Save Data'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice.

Now let me switch back to the slides.

The results obtained can be '''validated''' by results obtained by '''Ghia et.al for Reynolds No , Re= 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That's all we have in this tutorial.

Let us summarise.

In this tutorial we learnt
*'''Turbulent Flow in a Lid Driven Cavity'''
*and plotting '''stream lines '''in''' ParaView'''

This brings us to the end of the tutorial.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the '''cavity'''

* Change it to (100 100 1)

* Visualise the results in '''ParaView''' using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

This project is coordinated by http://spoken-tutorial.org

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Supersonic-flow-over-a-wedge/English

2019-05-30T07:12:03Z

DeepaVedartham:

Tutorial:Supersonic flow over a wedge using OpenFOAM

Script : Arvind N

Narration: Rahul Joshi

Keywords: Video tutorial,CFD,Wedge,Mach number,Compressible flows.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual Cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''Supersonic flow over a wedge using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*how to solve a '''compressible flow''' problem of '''supersonic flow over a wedge '''
*how post process the results in '''paraView'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial, I am using

*''' Linux Operating system Ubuntu version 10.04'''
*'''OpenFOAM version 2.1.0'''
*'''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5:

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial a learner should have some basic knowledge of
*'''Compressible flows''' and
*'''Gas Dynamics'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us now solve
*'''supersonic flow''' over a '''wedge''' using '''OpenFOAM''' and
*see the '''shock structure''' formed using '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The problem consists of a wedge with '''semi-angle of 15 degrees''' kept in a '''uniform supersonic flow'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inlet velocity 5m/s
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Inlet velocity''' is '''5 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions as shown in the figure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary conditions''' are set as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The type of '''solver''' I am using here is '''rhoCentralFoam'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It is a '''Density'''-based '''compressible flow solver'''.

It is based on '''central- upwind schemes of Kurganov and Tadmor '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Switch to the Terminal by Ctrl+Alt+T
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''command terminal '''.

To do this press '''Ctrl+Alt+T''' keys simultaneously on your keyboard.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type path for '''supersonic flow''' over a '''wedge'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In command terminal:

Type '''run''' and press '''Enter'''.

Problem is already set in OpenFOAM
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type ''''run'''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorial and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd tutorial - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''cd compressible - '''Press Enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd compressible - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''cd rhoCentralFoam - '''Press Enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd rhoCentralFoam - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd wedge and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd wedge15Ma5'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the name of the folder of '''supersonic flow''' over a wedge in '''rhoCentralFoam'''.

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You will see '''three folders''' : '''0,constant and system.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now open the '''blockMeshDict file'''.

To do this, type '''cd space constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd space polyMesh'''

Note that '''M''' here is capital and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

You can see the '''blockMeshDict file'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''gedit''' '''blockMeshDict''' and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''gedit space blockMeshDict'''.

Note that '''M''' and '''D '''here are capital and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Drag and scroll down.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me drag this to the '''capture area'''.

Scroll down.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| enter the data in '''vertices '''but it i already set up in the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you need to calculate the '''co-ordinates''' for the '''wedge'''.

This is already been calculated and set up in the problem.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The rest of the data remain the same.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary names similar to that in slide 5
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary patches''' the boundaries are set as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''blockMeshDict file'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type : cd .. (twice) and press '''Enter''' >> wedge folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''', type
'''cd ..(dot dot)''' twice to return back to the '''wedge folder'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now open the '''0 folder'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this type '''cd space 0''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains initial '''boundary condition''' for '''pressure,velocity''' and '''temprature'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd .. (dot dot)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh''' the geometry.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry.

type: blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in the '''command terminal''',
type '''blockMesh''' and press '''Enter'''.

'''Meshing''' has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal : type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to view the geometry in the '''terminal''', type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu''' click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About wedge geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you can see the '''geometry''' is which is a '''rectangular section upstream'''.

changes to a '''wedge downstream'''.

Close the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now run the '''solver 'rhoCentralFoam''''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal : rehoCentralFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in the '''command terminal''', type '''rhoCentralFoam''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations in terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running can be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations''' running will stop after it '''converges'''.

Or at the end of the '''time step'''.

Now the''' solving''' has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| open paraview

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To '''visualise''' these results let us open the '''ParaView''' window once again.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type: paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''', type “'''paraFoam” '''and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click APPLY in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again on the left hand side of '''object inspector menu '''click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Solid geometry in drop down menu

Select U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left side top in '''active variable control menu''', you will see a dropdown menu showing '''Solid Color'''.

Now click on it and change from solid color to capital '''U'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Make the color legend ON
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now make the '''color legend ON''' by clicking on the left hand side top of '''active variable control menu'''.

And make the '''color legend ON'''.

Click on it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of the '''ParaView''' window, you can see the '''VCR control'''.

Click on '''PLAY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the final results of '''U velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now scroll down the '''Properties''' in '''Object inspector menu''' on the left hand side.

Now click on '''Display''' besides '''Properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on rescale to size
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down and click on '''Rescale to Size'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the final value of '''Velocity magnitude'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select pressure in drop dwon menu (p)

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly you can select '''pressure'''.

You can see the final result of '''pressure'''.

Now close the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Calculate the Mach number

in terminal type Mach
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also calculate the '''Mach number''' for the '''flow'''.

To do this we can use the '''Openfoam '''utility by typing '''Mach''' in the '''command terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type mach in terminal.

mach number for each time step
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''Mach''' in the '''command terminal'''.

Note that '''M''' here is capital and press '''Enter'''.

You can see that '''Mach number''' is calculated for each '''time step'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open paraview window.

type paraFoam

click APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again open the '''ParaView''' window by typing in the '''command terminal paraFoam'''.

And press '''Enter'''.

Click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu, check the Ma check box.

change from solid color to Ma
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down.

In '''volume fields''' check the '''Ma '''box and again click '''APPLY'''.

On top of''' active variable control menu''' click on '''Solid Color''' and change it to '''Ma'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In VCR control click on play button >> make the color legend ON
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''VCR control''' menu click on '''PLAY''' and make the '''color legend ON'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Mach number''' in the''' color legend''' and corresponding colours.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We notice here that when the wedge is kept in a '''supersonic flow''',
*it produces a '''shock''' across which the '''flow properties'''
**temperature
** pressure
** and density
* drastically changes.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: For validation
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

The solved tutorial can be validated with exact solution available in basic books of '''Aerodynamics''' by '''John D Anderson'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9: Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

*'''Solving a compressible flow problem'''
*'''Velocity''' and '''pressure contour''' for the '''wedge'''
*'''OpenFOAM utility''' for calculating the '''Mach number'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment:

#Vary the '''wedge angle''' between '''10 °''' to '''15 ° '''
#to view the''' shock characteristic''' for the '''flow'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13:

Forum to answer questions

Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14:

Forum to answer questions

Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15:

Lab Migration Project

We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16:

Case Study Project

We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This script has been contributed by Arvind N.

And this is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English

2019-05-30T07:09:17Z

DeepaVedartham:

Tutorial: Simulating Flow in a Lid Driven Cavity.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,Lid Driven Cavity,Ghia et.al.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the '''spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

The''' Lid Driven Cavity''' '''file structure'''

'''Meshing '''the Geometry

Solving and '''post-processing results''' in '''Paraview'''

'''Plotting '''& '''validating''' results on a '''spreadsheet'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.04''' .

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

About Lid Driven Cavity flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is the most widely used '''2D test'''

case for validation of a '''CFD code'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is diagram of '''Lid Driven Cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary''' '''conditions''' remain the same

A '''moving wall''' and '''three fixedwalls'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are '''solving''' this for '''Reynolds no (Re) = 100'''

The '''moving wall''' has a velocity of '''1 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The path for the '''Lid Driven Cavity''' is the same as

discussed in the '''installation tutorial'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open a command terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Open a '''command terminal''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press ctrl +Alt+t keys simultaneously on keyboard
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity in terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorials and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' tutorials and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' incompressible and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type cd '''(space) cavity and '''Press Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''ls''' and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Three folders 0, constant and system
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''file structure of cavity''' you will see 3 folders :

'''0 , constant , and system'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''constant''' and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls '''and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Constant >> polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''constant folder '''contains another '''folder''' named '''polymesh'''

'''and a file describing the physical properties of fluid.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd (space) polymesh''' and '''Press Enter'''

'''Polymesh contains a file named blockMeshDict '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''blockMeshDict'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the file type '''gedit blockMeshDict'''

'''(Note '''that''' M and D '''here are''' capital)'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will Open up the '''blockMeshDict file'''

'''Let me drag this to the capture area'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains :

'''-cordinates for lid driven cavity'''

'''-blocking and meshing parameters'''

'''-and boundary patches.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No patches and arcs in the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''arcs''' as well as no '''patches''' to be''' merged'''

'''edges and mergePatchPairs can be kept empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal type cd .. and do this twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will come back to the''' cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd system and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''system''' and press enter,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

this contains three '''files'''

'''controlDict, fvSchemes and fvSolutions'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ControlDict

fvSolution

fvSchemes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''controlDict''' contains '''control parameters''' for start/end time.

'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.

'''fvSchemes''' contains equation for '''solver''',

'''tolerance''' etc.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again type '''cd (space) (dot dot) . . '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ( space )''' 0 (zero) and Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Initial values for bounary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''initial values''' for '''boundary conditions''' like

'''Pressure ,Velocity,Temperature etc.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type''' cd ( space ) (dot dot) . .''' to return to the '''cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh '''the''' geometry'''

'''We are using a course mesh here.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Mesh''' the '''geometry''' by typing '''blockMesh''' in the '''terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''blockMesh '''(Note that M here is capital)

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Meshing''' is done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If there is some '''error''' in the '''blockMesh file '''

it will be shown in the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the '''geometry'''

Type '''paraFoam''' , Note that '''F''' here is '''capital'''

and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will open the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on apply button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the left hand side of the '''object inspector menu''' click on '''Apply.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''lid driven cavity''' '''geometry'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the mesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Check the mesh by typing '''checkMesh''' in the''' terminal'''

Note that '''M''' here is capital

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the checkMesh command
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you can see the the '''number of cells''' ,

'''skewness''' and '''other parameters'''

which are associated with the '''mesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: icoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The solver we are using here is '''icoFoam''' :

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal '''type '''icoFoam'''

Note that '''F''' here is '''capital'''

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running will be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once the solving is done

type '''paraFoam''' in the terminal

to view the '''geometry''' and the '''results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu'''

'''click on Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Scroll down in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Scroll''' down the '''properties panel'''

of the '''objector inspector menu '''

'''for time step,regions and volume fields etc'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check or uncheck these boxes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check or uncheck '''these '''boxes''' in the '''mesh''' part

to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to capital U

initial condition

I will select capital U

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now after this on top of the''' active variable control '''

'''dropdown menu change from solid color to capital p or U'''

which are the '''initial conditions''' such as '''pressure or velocity'''

'''I will select capital U'''

Now this will show you the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the''' paraview window''' you can see the''' VCR control'''

'''Click on the play button'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Final result of velocity in lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now this is the final '''result''' of '''velocity''' for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Toggle on the '''color''' '''legend '''by clicking on

top left of the '''active variable control menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the''' color legend''' for '''U velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Validation of result
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to''' validate''' the '''results obtained'''

To do this let us '''plot''' the '''U and V velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to '''validate''' the result obtained

to do this let us plot the U and V velocity.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Menu > filters > data analysis > plot over line
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this Go to '''Filters Menu > Data Analysis > Plot Over line'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X , Y and Z axis'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select the X and Y axis

Select the X axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Select the '''X & Y axis''' turn by turn.

I will select the '''X axis''' and click '''Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Pressure and velocity''' '''plots''' being plotted

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For non-dimensional analysis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since it is a '''non dimensional analysis'''

we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot data Line click Y axis and apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in '''Plot Data''' click on the '''Y-axis'''

And click '''APPLY'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot can be seen

Go to file save data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the''' plot'''

In menu bar go to '''File > Save Data '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Give and appropriate name to your file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Give a name to the file

save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I will give this as '''cavity'''

The file will be saved as '''.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now click ok

Again click ok

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the cavity folder in icoFoam

cavity.csv file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to the '''cavity folder''' of '''openfoam directory'''.

'''Scroll '''down you can see the '''cavity.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open it in Open office or LibreOffice Spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy u0 and points 1 and save it another page of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the libreoffice spreadsheet copy

the U0 (u velocity) and to the right points1(Y-axis) columns

in another spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| U/U and y/L
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now divide both these coloumns

that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot the results using chart option

of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Plot the results in '''libreoffice''' '''charts''' option on top of the menu bar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Lid Driven Cavity (OpenFOAM)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Results obtained will be similar to this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Ghia et al.(1982) & Fluent
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Validate''' the result obtained on '''Lid Driven Cavity by : Ghia et al. (1982''') and

Results '''obtained from Fluent'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt how to install

'''File structure of Lid Driven cavity'''

'''Solved lid driven cavity'''.

'''Post-processing of results '''

'''Validation'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As as Assignment,

Change some '''parameters''' in the '''lid driven cavity'''

* '''Velocity Magnitude''' in the '''0 folder'''
* '''Kinematic viscosity in transportPorpoerties in constant folder'''

Plot the results of '''u/U and y/L'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 :

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact @spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Forum to answer questions
Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14: Forum to answer questions
Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15: Lab Migration project
We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16: Case Study project
We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 18:

About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/English

2019-05-30T07:05:08Z

DeepaVedartham:

Tutorial: Creating curved geometry in OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flow over cylinder, edges, blocks.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual Cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating Curved geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''Steps''' for creating a create a '''curved geometry in openfoam'''

Viewing the '''results in paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.0'''4.

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5:

Hover over cylinder

Hover over the geometry

Hover over blocks

break the circle into 4 parts
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will create a '''geometry''' for '''flow over cylinder'''.

Note that I am using this case just for '''explanation'''.

The '''cylinder '''is in a form of a '''semi circle.'''

'''Meshing is a body fitted grid'''.

The entire '''geometry''' is divided into blocks.

We break the '''semi circle''' into equal number of '''parts'''.

Now minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the lid driven cavity blockMeshDict file

Hover over arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''blockMeshDict '''file of the previous tutorial

I have already opened it

Scroll down, for '''simple geometries''' you can see that

'''edges '''is kept empty

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Create a new '''blockMeshDict''' file

To do this let us '''minimise''' this first

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| On the desktop

Right click > create document >create file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Right click > create document > empty file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Name this as blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| name this as '''blockMeshDict'''.

Note that '''M and D here are capital'''

'''Open this'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy the blockMeshDict of Lid driven cavity file from line 0 to line

convert to meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now you can copy the initial few lines from the '''lid driven cavity upto convertTometers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy these lines
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Go up '''copy''' this upto '''convertToMeters'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Paste in the new blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy this''' and '''paste it''' in the new '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change the geometry to point one to one
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change the '''convert to meters''' from '''point one to one'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Geometry is in meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As our '''geometry''' is in '''meters''' we will keep this as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now press enter ,

press enter again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the figure of flow over cylinder in slide 4

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this you need to enter the '''co-ordinates''' of the''' geometry''' in '''vertices'''

Note that the points should be in an ordered way starting from '''0,1,2,3''' etc. as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type vertices after convertTometers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''vertices''' in the '''blockMeshDict''' file and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open bracket '''

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the co-ordinates as shown in the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the '''co-ordinates''' of points as shown in the '''diagram'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the next slide for half semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For '''explanation''' I will use the '''right half of the semi-circle'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the values for the points in the figure starting '''from 0'''

Let me switch back to the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinates''' of '''point 0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 0 - Insert (0.5 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket and enter '''(0.5 (space) 0 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again leave some space , '''open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 1- Insert (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter co-ordinates for point 1 (1 (space) 0 (space) 0)

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave two '''vertical spaces''' ,

press enter

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinate '''for the point number 4

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 – Insert (0.707 0.707 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Open close bracket''',''' enter (0.707 (space) 0.707 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Leave some space

'''Open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 5 -Insert (0.353 0.353 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the co-ordinates for point 5'''

'''Enter (0.353 (space) 0.353 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Now leave 4 vertical spaces''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter co-ordinates for point number 9'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Vertical spaces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''1 2 3 4 ,''' again press enter

leave some space

'''Open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 9 – Insert (0 1 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''(0 (space) 1 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter '''co-ordinates''' for '''point number 10'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 10 -Insert (0 0.5 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket''' (0 (space) 0.5 (space) 0)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Remaining part of the semi-circle

use the same procedure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly '''enter the co-ordinates for remaining points''' in the geometry.

Insert a close bracket and put a''' semi-colon '''

Press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file type blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type blocks''' and press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide showing blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Block numbers''' are circled as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the type of block here
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter the type of '''block i.e. Hex'''

leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter points for blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the''' points''' for the '''blocks'''

'''Open close brackets'''

Leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| SimpleGrading (1 1 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| ths '''simple grading''' can be kept as '''(1 1 1) '''

press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the previous tutorial on simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For creating the '''blocks''' please refer to the '''tutorial'''

on '''creating simple geometry in OpenFOAM'''

'''Note that''' there will be more number of '''blocks''' in this example

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert close bracket and

semi-colon

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Insert a close bracket'''

'''Insert a semi-colon''' and press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in the next line type '''edges''' and press enter

insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''points''' which are the '''end points of the arcs'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the arc points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space and '''type arc''' and leave some space

Type the points which are the '''end points of the arc'''
Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert end points of the arc

From ths slide

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this insert the '''end points of the arc'''

We '''start''' with '''0 5'''

Let me switch back to the '''blockMeshDict file'''

Enter''' 0 space 5'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Insert '''open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In brackets enter the co-ordinate of any '''intermediate''' point in between the two '''arc points'''.

Now Let me switch back again to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: for arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the figure you can see that you have to pick up a point

in between the two points.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this geometry I have picked up '''right half''' of the circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide shwoing trignometric relations

Sin(theta) and cos(theta) relations
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using '''simple geometric relations'''

you can find the co-ordinates of the intermediate point shown in the semi-circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Repeat the above procedure for the remaining semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly you can '''repeat''' the procedure for rest of the '''semi-circle geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Note that there are more number of arcs in this example'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I'''nsert a close bracket'''

'''Insert a semi -colon and press enter'''

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the next line after arcs

refer to the tutorial on creating simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the boundary patches after arcs'''

'''Refer to the tutorial on Simple geometry in OpenFOAM '''

For entering the '''boundary patches'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter boundary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''boundary'''

'''Insert open-close bracket and press enter'''

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type mergePatchPairs

P here is capital
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the next line type '''mergePatchPairs'''

Note that '''P here is capital'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''no patches''' to be '''merged''' this can be kept empty

Insert a '''close bracket'''

Insert a '''semi -colon '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 :

Points for the front face in the geometry

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

Similarly enter the '''co-ordinate''' points for the points

in the '''front face''' of unit thickness of the '''geometry'''

as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''Command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter

cd tutorials and press enter

cd basic and press enter

cd potentialFoam and press enter

cd cylinder and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for your case file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already set the path for the '''tutorial case of flow over cylinder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''blockMesh '''for '''meshing''' the geometry''' and press enter'''

Meshing is done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: For OpenFOAM v 5.0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open cylinder case directory, type the following in your run folder:

'''$cd tutorials/basic/potentialFoam/cylinder'''

To run Allrun script file, type:

'''$./Allrun'''

This will run blockMesh and potentialFoam commands

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type paraFoam''' in the terminal

and press enter

to view the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me drag this to the capture area

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click APPLY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the '''left''' side of '''object inspector menu''' click '''Apply'''

The '''geometry''' created will be seen in the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down the '''Object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check and uncheck the mesh field box
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check and uncheck the Mesh field box'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see '''different regions''' of the geometry.

You can also see the''' wire frame '''of the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For wireframe of the geometry

Change from surface to wireframe
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu''' in the '''drop down menu'''

Change from '''Surface to wireframe'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''wireframe model''' of the geometry

close this

Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9: Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

How to '''create a curved geometry'''.

How to '''enter points for edges in OpenFOAM'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an Assignment

Create a geometry with '''inner semi-circle of radius 2 meters'''

'''and outer circle of radius 4 meters'''

and

View the results in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.com

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13 : Forum to answer questions
Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14 : Forum to answer questions
Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15 : Lab Migration project
We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16 : Case Study project
We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17 :

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining

|}

OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English

2019-05-30T07:00:29Z

DeepaVedartham:

'''Title of script''': Creating simple geometry in OpenFOAM

'''Author''': Rahul Ashok Joshi

'''Keywords''': Video Tutorial,Computational Fluid Dynamics (CFD),OpenFOAM geometry

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating a simple geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objective
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*How to create a '''simple geometry'''
*How to view geometry in '''paraview '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
*'''Linux Operating system Ubuntu 10.04 '''
*'''OpenFOAM version 2.1.0 '''
*'''ParaView version 3.12.0 '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Only narration

run>> tutorials >> incompressible>> icoFoam >>cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''CFD''' the '''Pre-processing''' part consists of creating geometry and '''meshing''' it.

Let us take the '''Lid driven cavity''' case as an example.

I have already opened the '''command terminal''' and entered

the path for '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5: For OpenFOAM v 5.0

To source the OpenFOAM version 5, type:

'''$of5 '''

To go to the run folder, type:

'''$cd $FOAM_RUN '''

To open the cavity case directory, type:

'''$cd tutorials/incompressible/icoFoam/cavity/cavity '''

To list the contents of case directory, type:

'''$ls '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the command terminal

constant>>polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There are three folders '''0,constant''',and '''system'''

'''Geometry''' is inside the '''polymesh''' folder of '''constant'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window: type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type '''cd constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

In this there is another folder called as''' polymesh'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd polymesh''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.
|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: For OpenFOAM v 5.0

To list the contents of the '''cavity''' directory, type:

'''$ls'''
'''0 constant system'''

To open the system directory, type:

'''$cd system'''

To list the contents of the system directory, type:

'''$ls'''
'''blockMeshDict controlDict fvSchemes fvSolution'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the blockMeshDict file.

Type gedit blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''geometry''' file called as '''blockMeshDict'''.

Open the '''blockMeshDict''' file with any '''editor''' of your choice.

In the '''terminal''' type '''gedit blockMeshDict'''.

Note that '''M''' and '''D''' here are capital and press '''Enter'''.

Let me drag this to the '''capture area'''.

Now minimise this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover over the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''OpenFoam''' the entire geometry is broken into '''blocks.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Block vertex starts from 0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''blocks''' are numbered starting from''' 0 '''as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For 2D geometry enter a unit thickness cell in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that in '''OpenFOAM''' for creating a '''2D geometry''', you need to give '''cell thickness value''' in the '''z-axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Dimension of Cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is of '''length 1 and height 1'''.

Minimise the slide.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create empty file

right click >create document>empty file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On your '''desktop''' create an '''empty file''' by

'''right click > create document > Empty file '''

Name this as '''blockMeshDict.'''

(Note that M and D here are capital)

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy data from old blockMeshDict file

upto convertToMeters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|Open this.

Now copy the data from the original '''lid driven cavity blockMeshDict''' file to the new '''blockMeshDict''' file from '''line 0'''.

Scroll up. '''line 0''' upto '''convertTometers'''.

Copy this and paste it here.

Scroll down.

Now leave some space after '''convertTometers'''.

Enter '''1''' as the geometry is in meters.

Insert a semi-colon and press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file

type vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the file type '''vertices''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert the '''open bracket''' and press '''Enter'''.

Press the '''Tab''' key.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Start with point 0

(0 0 0) and move to positive x axis

enter (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Start with point '''0'''.

Insert open close brackets.

Enter

'''(0 space 0 space 0) '''and press '''Enter'''.

Again press '''Tab''' key.

Open close bracket.

Move towards point 1 in positive '''x-axis''' and enter '''(1 space 0 space 0)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 2 in the x-y plane
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Move towards point 2 in the '''positive x-y plane''' and enter '''(1 space 1 space 0)'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 3 in y direction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Enter the 3rd point in '''positive y axis (0 space 1 space 0 )'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 in the front face

enter (1 0 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key.

Enter the 4th point on the '''front face.

Open close bracket. (0 space 0 space 0.1)'''

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points 5,6,7 with unit cell thickness in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter the other '''points''' with one unit value in the '''positive z -axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the''' bracket''' and insert a '''semicolon''' after it.

Press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blocks and insert (

Lid driven cavity is a single block
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below vertices are the '''blocks'''.

Type '''blocks''' and press '''Enter'''.

Insert an open bracket and press '''Enter'''.

Let me switch back to the slides.

Note that Lid driven cavity is taken as a '''single block '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the vertices of block

block (0 1 2 3 4 5 6 7 ) total 8 points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to '''blockMeshDict'''.

Enter the points for the blocks in the clockwise sense.

We are using here hexahedral blocks for meshing.

Now type hex '''H E X''', leave some space, in brackets enter '''(0 space 1 space 2 space 3 space 4 space 5 space 6 space 7)'''. Again leave some space.

Note that for '''multiple blocks''' the points will be more.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter grid points in x, y and z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this enter the '''grid points''' in the x,y,and z directions

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the mesh/grid size

enter ( 30 30 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''brackets''' enter '''(30 space 30 space 1)''', leave some space. You can '''modify''' the '''grid''' as when needed.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Grid point in z axis is kept as 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Grid point in z-axis''' can be taken as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter simpleGrading value ( 1 1 1 )

insert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now leave some space and type '''simple grading''' leave some space and enter '''(1 space 1 space 1)'''.
This is the grid spacing in the x,y and z direction.

Press enter, insert a '''close bracket''' and insert the '''semicolon''' and press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''edges''' and press enter,as this is a simple geometry edges can be kept empty.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert ( );
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert '''open bracket''' press enter, close a bracket insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below '''edges''' are the '''boundary conditions'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''boundary name''' for the '''faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type boundary

insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''boundary''' and press enter

insert a''' open bracket''' and press enter

Let me switch back to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the geometry the '''upper wall is moving''' and other '''three walls are fixed'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Front and back faces are named as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''front and back faces''' are termed as '''empty''' as this is a 2D problem

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open the '''New blockMeshDict''' file again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patch as moving wall
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary''' put the name of the '''patch''' as '''moving wall''' press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert {
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open curly bracket''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type of moving wall : wall

insert ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''type''' for the '''moving wall'''. Enter '''type space wall'''

insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type faces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now faces, now press enter, insert '''open bracket''', press enter, press a '''tab''' key, '''open close''' bracket and in this bracket type '''faces'''
Enter open and close brackets
In brackets enter the points for faces

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that order the points in such a way that the '''thumb''' should be '''normal''' to that '''face '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Clockwise curl of fingers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| And '''fingers''' make a '''curl''' as shown in the figure. The '''curl''' can be '''clockwise''' or '''anticlockwise'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points should be entered matching the points inserted in vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also note that the '''points''' should match with the '''points inserted in vertices'''. Now let me switch back to new '''blockMeshDict''' file.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter (3 7 6 2)

insert } and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the '''face point'''s as '''(3 space 7 space 6 space 2)'''. Let me switch back to the slide. These are the points for the moving wall '''(3 7 6 2)'''. Minimize this. Note that you can start from any point on that face.
Now press enter. Close the bracket. You need to enter the '''semicolon'''.
After you insert the points for the faces again press enter. Close the '''curly''' bracket. Another note now after the curly brackets press enter again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patches for fixedWalls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter '''boundary condition''' and '''faces''' for the '''fixed wall '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For front and back face enter type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Being a 2D problem the '''type of boundary'''

for '''front and back face''' can be kept as '''empty'''.
Refer to figure in this slide for entering the points.
Insert the '''closed brackets''' and put a '''semicolon'''. Again press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert mergePatchPairs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''mergePatchPairs''' and press enter. Since there are no patches to be merged, it can be kept empty. Insert the '''Open-closed brackets''' and insert a '''semicolon'''. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| BlockMeshDict file is completed

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with creating the '''blockMeshDict''' file.

The complete''' blockMeshDict '''file is as shown here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the original blockMeshDict file

The command terminal will not work till blockMeshDict is closed
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''original blockMeshDict''' file

Note that '''command terminal''' will not work until '''blockMeshDict file''' is '''closed'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''cd (dot) (dot)''' twice to return to the '''cavity''' folder '''Mesh the geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing, type blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in '''terminal''' type: '''blockMesh''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Viewing the geometry type paraFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| View the '''geometry''' by typing in the '''command terminal''' '''paraFoam''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click Apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side click '''Apply''' on '''object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9: Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

Creating a simple geometry in '''OpenFOAM'''

Viewed the '''geometry''' in '''Paraview '''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment

Change the geometry parameters : Enter the '''grid point'''s as '''(40 40 1) and (50 50 1)'''.

View the geometry in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 : About spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL: [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial.org/What_is_a_Spoken_Tutorial]

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12 : spoken tutorials workshops
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at contact@spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13 : Forum to answer questions
Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14 : Forum to answer questions
Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15 : Lab Migration project
We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16 : Case Study project
We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17 : Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C2/Supersonic-flow-over-a-wedge/English

2019-05-30T06:35:01Z

DeepaVedartham:

Tutorial:Supersonic flow over a wedge using OpenFOAM

Script : Arvind N

Narration: Rahul Joshi

Keywords: Video tutorial,CFD,Wedge,Mach number,Compressible flows.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual Cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''Supersonic flow over a wedge using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*how to solve a '''compressible flow''' problem of '''supersonic flow over a wedge '''
*how post process the results in '''paraView'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial, I am using

*''' Linux Operating system Ubuntu version 10.04'''
*'''OpenFOAM version 2.1.0'''
*'''ParaView version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide:

System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial a learner should have some basic knowledge of
*'''Compressible flows''' and
*'''Gas Dynamics'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let us now solve
*'''supersonic flow''' over a '''wedge''' using '''OpenFOAM''' and
*see the '''shock structure''' formed using '''ParaView'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The problem consists of a wedge with '''semi-angle of 15 degrees''' kept in a '''uniform supersonic flow'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inlet velocity 5m/s
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Inlet velocity''' is '''5 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions as shown in the figure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary conditions''' are set as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 : Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The type of '''solver''' I am using here is '''rhoCentralFoam'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It is a '''Density'''-based '''compressible flow solver'''.

It is based on '''central- upwind schemes of Kurganov and Tadmor '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Switch to the Terminal by Ctrl+Alt+T
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''command terminal '''.

To do this press '''Ctrl+Alt+T''' keys simultaneously on your keyboard.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type path for '''supersonic flow''' over a '''wedge'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In command terminal:

Type '''run''' and press '''Enter'''.

Problem is already set in OpenFOAM
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type ''''run'''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorial and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd tutorial - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''cd compressible - '''Press Enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd compressible - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''cd rhoCentralFoam - '''Press Enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd rhoCentralFoam - '''Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd wedge and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd wedge15Ma5'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the name of the folder of '''supersonic flow''' over a wedge in '''rhoCentralFoam'''.

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You will see '''three folders''' : '''0,constant and system.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now open the '''blockMeshDict file'''.

To do this, type '''cd space constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd space polyMesh'''

Note that '''M''' here is capital and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

You can see the '''blockMeshDict file'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type '''gedit''' '''blockMeshDict''' and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''gedit space blockMeshDict'''.

Note that '''M''' and '''D '''here are capital and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Drag and scroll down.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me drag this to the '''capture area'''.

Scroll down.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| enter the data in '''vertices '''but it i already set up in the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you need to calculate the '''co-ordinates''' for the '''wedge'''.

This is already been calculated and set up in the problem.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The rest of the data remain the same.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary names similar to that in slide 5
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary patches''' the boundaries are set as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''blockMeshDict file'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type : cd .. (twice) and press '''Enter''' >> wedge folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''', type
'''cd ..(dot dot)''' twice to return back to the '''wedge folder'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now open the '''0 folder'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this type '''cd space 0''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''ls''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains initial '''boundary condition''' for '''pressure,velocity''' and '''temprature'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd .. (dot dot)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh''' the geometry.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry.

type: blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in the '''command terminal''',
type '''blockMesh''' and press '''Enter'''.

'''Meshing''' has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal : type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to view the geometry in the '''terminal''', type '''paraFoam''' and press '''Enter'''.

This will open the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu''' click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About wedge geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you can see the '''geometry''' is which is a '''rectangular section upstream'''.

changes to a '''wedge downstream'''.

Close the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now run the '''solver 'rhoCentralFoam''''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal : rehoCentralFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in the '''command terminal''', type '''rhoCentralFoam''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations in terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' running can be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations''' running will stop after it '''converges'''.

Or at the end of the '''time step'''.

Now the''' solving''' has been done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| open paraview

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To '''visualise''' these results let us open the '''ParaView''' window once again.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| type: paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''', type “'''paraFoam” '''and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click APPLY in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again on the left hand side of '''object inspector menu '''click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Solid geometry in drop down menu

Select U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left side top in '''active variable control menu''', you will see a dropdown menu showing '''Solid Color'''.

Now click on it and change from solid color to capital '''U'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Make the color legend ON
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now make the '''color legend ON''' by clicking on the left hand side top of '''active variable control menu'''.

And make the '''color legend ON'''.

Click on it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of the '''ParaView''' window, you can see the '''VCR control'''.

Click on '''PLAY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the final results of '''U velocity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now scroll down the '''Properties''' in '''Object inspector menu''' on the left hand side.

Now click on '''Display''' besides '''Properties'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on rescale to size
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down and click on '''Rescale to Size'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the final value of '''Velocity magnitude'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select pressure in drop dwon menu (p)

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly you can select '''pressure'''.

You can see the final result of '''pressure'''.

Now close the '''ParaView''' window.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Calculate the Mach number

in terminal type Mach
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also calculate the '''Mach number''' for the '''flow'''.

To do this we can use the '''Openfoam '''utility by typing '''Mach''' in the '''command terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type mach in terminal.

mach number for each time step
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''Mach''' in the '''command terminal'''.

Note that '''M''' here is capital and press '''Enter'''.

You can see that '''Mach number''' is calculated for each '''time step'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open paraview window.

type paraFoam

click APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again open the '''ParaView''' window by typing in the '''command terminal paraFoam'''.

And press '''Enter'''.

Click '''APPLY'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu, check the Ma check box.

change from solid color to Ma
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down.

In '''volume fields''' check the '''Ma '''box and again click '''APPLY'''.

On top of''' active variable control menu''' click on '''Solid Color''' and change it to '''Ma'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In VCR control click on play button >> make the color legend ON
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''VCR control''' menu click on '''PLAY''' and make the '''color legend ON'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In paraview window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Mach number''' in the''' color legend''' and corresponding colours.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We notice here that when the wedge is kept in a '''supersonic flow''',
*it produces a '''shock''' across which the '''flow properties'''
**temperature
** pressure
** and density
* drastically changes.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : For validation
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

The solved tutorial can be validated with exact solution available in basic books of '''Aerodynamics''' by '''John D Anderson'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide ; Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

*'''Solving a compressible flow problem'''
*'''Velocity''' and '''pressure contour''' for the '''wedge'''
*'''OpenFOAM utility''' for calculating the '''Mach number'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9 : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment:

#Vary the '''wedge angle''' between '''10 °''' to '''15 ° '''
#to view the''' shock characteristic''' for the '''flow'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide:

Forum to answer questions

Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide:

Forum to answer questions

Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide:

Lab Migration Project

We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide:

Case Study Project

We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This script has been contributed by Arvind N.

And this is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C2/2D-Laminar-Flow-in-a-channel/English

2019-05-30T06:04:49Z

DeepaVedartham:

Tutorial: Simulating Laminar flow in a channel.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,laminar flow,simpleFoam,channel

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''Simulating 2D Laminar Flow in a Channel using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''2D geometry of channel '''

'''Meshing the Geometry'''

'''Solving''' and '''Post Processing results''' in '''Paraview'''

and Validation with '''analytic result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3 : System requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu 12.04''' .

'''OpenFOAM version 2.1.1'''

'''ParaView version 3.12.0 '''

Note that '''OpenFOAM''' version '''2.1.1''' is supported on '''ubuntu version 12.04'''

Hence forth all the tutorials will be covered using '''OpenFOAM version 2.1.1''' and''' ubuntu version 12.04'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4 : System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Prerequisite
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As a Prerequisite for this tutorial, You should know how to create '''geometry''' using '''OpenFOAM '''

If not, please refer to the '''relevant tutorials''' on our '''website'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 : About flow in a channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* We simulate flow in a '''Channel''' to determine
* '''Flow development length''' along the downstream
|-
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel Flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Channel flow''' problem description.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary names''' and '''inlet conditions''' are shown in this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''flow develpoment length''' is given by the formula

'''L = 0.05 * Re * D'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Re''' which is the '''Reynolds number'''

and '''D''' which is the '''channel height'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using the '''formula''' length of the channel comes out to be '''5 meters '''

and '''height''' is kept as '''1 meters'''.

The '''Inlet velocity is 1''' '''meters per second'''

And we are solving this for a '''Reynolds number''' '''( Re ) equal 100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9 : File structure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is a '''steady state problem '''

Therefore we are using a '''steady state incompressible''' solver for this case
This is the '''file structure''' of our case
The '''folder''' should be created in the solver type that we choose
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create a floder and name it as channel in simpleFoam folder

right click >> new folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already created a '''folder''' in

'''simpleFoam folder''' of''' incompressible flow solvers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Nmae the folder channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''folder''' is named as''' channel'''

Now let me switch to the '''folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| copy 0,constant and system from pitzDaily to this channel folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy 0,Constant and System''' '''folders''' of any other case file in the '''simpleFoam directory'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have copied the''' file structure''' of case of''' pitzDaily'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Paste it in the channel folder and

make the necessary changes in the '''geometry''',

'''boundary faces''' and '''boundary condition'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me '''open the command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys simultaneously
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt +t''' keys simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal

Type '''run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''tutorials and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''incompressible and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type cd space '''simpleFoam and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| channel and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''channel and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You will see three folders '''0 , Constant and System'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type in command terminal

cd constant and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''constant and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| polymesh folder and 2 other files
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see '''files''' containing

'''properties of fluid''' and a''' folder named polymesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit RASProperties and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''RASProperties''' contains '''Reynolds-averaged stress '''model

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Transportproperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''transportProperties''' contain the '''transport model '''

and

'''kinematic viscosity (that is nu), in this case, is set at 0.001 m²/s (meter square per second)'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd polyMesh and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will see the '''blockMeshDict''' file here

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open the '''blockMeshDict''' file in the

terminal '''type gedit blockMeshDict and press enter'''

Scroll down

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file covertTometers is set to 1

Set the vertices for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The geomery is in '''meters '''so the '''convertTometers''' is set to 1

next we have''' defined''' the '''vertices of the channel '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh size for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We have used a '''100 X 100''' mesh size here and '''cell spacing''' is kept as '''( 1 1 1 )'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions and types
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Next we have set up '''boundary conditions''' and their types which are set as '''inlet ,outlet,top and bottom '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| FrontAndBack boundary type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As this is a '''2D geometry frontAndBack''' is kept as '''empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Due to a 2 dimensional geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also this being a '''simple geometry '''

'''mergePatchPair''' and '''edges''' are to kept '''empty'''.

Close the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' Type '''cd space ..(dot dot) '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again type '''cd space .. (dot dot)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terninal window type cd 0

type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd '''space '''0 (Zero) and press enter'''

Now Type''' ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal you can see these slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''intial boundary conditions '''

and''' wall functions''' for the '''channel case'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Wall functions : epsilon, k, nut, nutilda

initial flow conditions: p, R and U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It should contain various files such as

'''epsilon ,k, nut,nuTilda '''

which are the '''wall functions'''

and

'''p , R and capital U''' which the are '''initial conditions of the flow'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 : Calculate K.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Calculate k''' which is the '''turbulent kinetic energy'''

from the '''formula''' given in the slide

Where '''Ux, Uy and Uz''' are the '''velocity'''

'''components in the x, y and z direction'''

And '''U' ( dash ) = 0.05''' times '''u''' actual

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 : Calculate epsilon

epsilon - rate of disspiation turbulent kinetic energy

C mu - constant

l – length of channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Calculate '''epsilon''' from the '''formula''' given

Where '''epsilon''' is the''' rate of disspiation turbulent kinetic energy'''

'''C mu''' is a '''constant''' and its value is''' 0.09'''

And''' l''' is the '''length of the channel'''

Let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change only the boundary names
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change only the '''boundary names''' in each of the above '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not chnge the values of nu,nuTilde and R
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that the values of '''nut, nuTilda and R '''

are to kept default

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rest of the '''files''' should contain initial value

for each of the '''boundary faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window type '''cd ..''' and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal Type '''cd (space) ..(dot dot) and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No change in system folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is no change to be done in the '''system folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry

terminal window type : blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, We need to '''mesh the geometry'''

To do this

In the '''command terminal''' '''type blockMesh and press enter'''

'''Meshing''' is done

Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12 : Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''type of solver''' we are using here is '''simpleFoam'''

It is a '''Steady-state''' solver for '''incompressible, turbulent flow'''

let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' '''type simpleFoam and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations in terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations running''' will be seen in the '''command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running may take some time

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations converge or stop at end of time step
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' will stop once the solution is

'''converged''' or it reaches its '''end time value'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal

type: paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the results in '''paraview''' in the '''terminal '''

type '''paraFoam and press enter'''

This will open up the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In paraview window

View the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On let hand side of the '''paraview''' '''window''' click '''Apply'''

The '''geometry '''can be seen here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu change '''

the '''drop down menu''' from '''solid color to capital U'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Look at left side of the channel geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''initial state''' of '''velocity magnitude''' at '''inlet.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control click PLAY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of the '''paraview window''' click on the

'''play''' '''button''' of the '''VCR control'''

you can see the final value of the '''velocity magnitude'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Color legend from top left
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also''' toggle on''' the '''color legend''' from the

left hand side top of '''active variable control menu'''

'''Click APPLY''' again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu

click on rescale to data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to '''display'''

Scroll down

You can see '''Rescale''' , click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the color legend for this
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We can see that once the '''flow has fully devloped '''

it attains a '''maximum uniform velocity''' at the '''center'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13 :Validation
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The results obtained can be '''validated '''with

the '''analytical solution''' for '''laminar flow''' in a

'''channel which is u(max)=1.5 Uavg'''

Using '''openfoam''' we obatain a '''velocity of 1.48 meters per second''' which is a good match

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14 : Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt

The '''File structure of channel '''

'''Obtained solution''' using '''steady state solver'''

Viewed the geometry in '''paraview '''

'''Validation''' with '''analytic results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15 :

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment:

Solve the problem for '''Reynold Number 1500''' and

'''validate it with the analytical result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16 : About the Spoken Tutorial Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17 : Spoken Tutorial Workshops
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 18 :

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 19 :

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 20 :

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 21:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 22 :

Acknowledgement

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English

2019-05-30T06:03:59Z

DeepaVedartham:

Tutorial: Simulating Flow in a Lid Driven Cavity.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,Lid Driven Cavity,Ghia et.al.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the '''spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

The''' Lid Driven Cavity''' '''file structure'''

'''Meshing '''the Geometry

Solving and '''post-processing results''' in '''Paraview'''

'''Plotting '''& '''validating''' results on a '''spreadsheet'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.04''' .

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

About Lid Driven Cavity flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is the most widely used '''2D test'''

case for validation of a '''CFD code'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is diagram of '''Lid Driven Cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary''' '''conditions''' remain the same

A '''moving wall''' and '''three fixedwalls'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are '''solving''' this for '''Reynolds no (Re) = 100'''

The '''moving wall''' has a velocity of '''1 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The path for the '''Lid Driven Cavity''' is the same as

discussed in the '''installation tutorial'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open a command terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Open a '''command terminal''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press ctrl +Alt+t keys simultaneously on keyboard
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity in terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorials and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' tutorials and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' incompressible and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type cd '''(space) cavity and '''Press Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''ls''' and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Three folders 0, constant and system
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''file structure of cavity''' you will see 3 folders :

'''0 , constant , and system'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''constant''' and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls '''and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Constant >> polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''constant folder '''contains another '''folder''' named '''polymesh'''

'''and a file describing the physical properties of fluid.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd (space) polymesh''' and '''Press Enter'''

'''Polymesh contains a file named blockMeshDict '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''blockMeshDict'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the file type '''gedit blockMeshDict'''

'''(Note '''that''' M and D '''here are''' capital)'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will Open up the '''blockMeshDict file'''

'''Let me drag this to the capture area'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains :

'''-cordinates for lid driven cavity'''

'''-blocking and meshing parameters'''

'''-and boundary patches.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No patches and arcs in the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''arcs''' as well as no '''patches''' to be''' merged'''

'''edges and mergePatchPairs can be kept empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal type cd .. and do this twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will come back to the''' cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd system and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''system''' and press enter,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

this contains three '''files'''

'''controlDict, fvSchemes and fvSolutions'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ControlDict

fvSolution

fvSchemes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''controlDict''' contains '''control parameters''' for start/end time.

'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.

'''fvSchemes''' contains equation for '''solver''',

'''tolerance''' etc.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again type '''cd (space) (dot dot) . . '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ( space )''' 0 (zero) and Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Initial values for bounary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''initial values''' for '''boundary conditions''' like

'''Pressure ,Velocity,Temperature etc.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type''' cd ( space ) (dot dot) . .''' to return to the '''cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh '''the''' geometry'''

'''We are using a course mesh here.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Mesh''' the '''geometry''' by typing '''blockMesh''' in the '''terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''blockMesh '''(Note that M here is capital)

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Meshing''' is done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If there is some '''error''' in the '''blockMesh file '''

it will be shown in the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the '''geometry'''

Type '''paraFoam''' , Note that '''F''' here is '''capital'''

and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will open the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on apply button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the left hand side of the '''object inspector menu''' click on '''Apply.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''lid driven cavity''' '''geometry'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the mesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Check the mesh by typing '''checkMesh''' in the''' terminal'''

Note that '''M''' here is capital

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the checkMesh command
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you can see the the '''number of cells''' ,

'''skewness''' and '''other parameters'''

which are associated with the '''mesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide ; icoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The solver we are using here is '''icoFoam''' :

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal '''type '''icoFoam'''

Note that '''F''' here is '''capital'''

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running will be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once the solving is done

type '''paraFoam''' in the terminal

to view the '''geometry''' and the '''results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu'''

'''click on Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Scroll down in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Scroll''' down the '''properties panel'''

of the '''objector inspector menu '''

'''for time step,regions and volume fields etc'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check or uncheck these boxes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check or uncheck '''these '''boxes''' in the '''mesh''' part

to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to capital U

initial condition

I will select capital U

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now after this on top of the''' active variable control '''

'''dropdown menu change from solid color to capital p or U'''

which are the '''initial conditions''' such as '''pressure or velocity'''

'''I will select capital U'''

Now this will show you the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the''' paraview window''' you can see the''' VCR control'''

'''Click on the play button'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Final result of velocity in lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now this is the final '''result''' of '''velocity''' for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Toggle on the '''color''' '''legend '''by clicking on

top left of the '''active variable control menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the''' color legend''' for '''U velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Validation of result
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to''' validate''' the '''results obtained'''

To do this let us '''plot''' the '''U and V velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to '''validate''' the result obtained

to do this let us plot the U and V velocity.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Menu > filters > data analysis > plot over line
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this Go to '''Filters Menu > Data Analysis > Plot Over line'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X , Y and Z axis'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select the X and Y axis

Select the X axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Select the '''X & Y axis''' turn by turn.

I will select the '''X axis''' and click '''Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Pressure and velocity''' '''plots''' being plotted

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For non-dimensional analysis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since it is a '''non dimensional analysis'''

we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot data Line click Y axis and apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in '''Plot Data''' click on the '''Y-axis'''

And click '''APPLY'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot can be seen

Go to file save data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the''' plot'''

In menu bar go to '''File > Save Data '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Give and appropriate name to your file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Give a name to the file

save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I will give this as '''cavity'''

The file will be saved as '''.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now click ok

Again click ok

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the cavity folder in icoFoam

cavity.csv file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to the '''cavity folder''' of '''openfoam directory'''.

'''Scroll '''down you can see the '''cavity.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open it in Open office or LibreOffice Spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy u0 and points 1 and save it another page of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the libreoffice spreadsheet copy

the U0 (u velocity) and to the right points1(Y-axis) columns

in another spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| U/U and y/L
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now divide both these coloumns

that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot the results using chart option

of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Plot the results in '''libreoffice''' '''charts''' option on top of the menu bar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Lid Driven Cavity (OpenFOAM)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Results obtained will be similar to this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Ghia et al.(1982) & Fluent
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Validate''' the result obtained on '''Lid Driven Cavity by : Ghia et al. (1982''') and

Results '''obtained from Fluent'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt how to install

'''File structure of Lid Driven cavity'''

'''Solved lid driven cavity'''.

'''Post-processing of results '''

'''Validation'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As as Assignment,

Change some '''parameters''' in the '''lid driven cavity'''

* '''Velocity Magnitude''' in the '''0 folder'''
* '''Kinematic viscosity in transportPorpoerties in constant folder'''

Plot the results of '''u/U and y/L'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 :

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact @spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14:

About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/2D-Laminar-Flow-in-a-channel/English

2019-05-30T06:03:20Z

DeepaVedartham:

Tutorial: Simulating Laminar flow in a channel.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,laminar flow,simpleFoam,channel

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''Simulating 2D Laminar Flow in a Channel using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''2D geometry of channel '''

'''Meshing the Geometry'''

'''Solving''' and '''Post Processing results''' in '''Paraview'''

and Validation with '''analytic result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3 : System requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu 12.04''' .

'''OpenFOAM version 2.1.1'''

'''ParaView version 3.12.0 '''

Note that '''OpenFOAM''' version '''2.1.1''' is supported on '''ubuntu version 12.04'''

Hence forth all the tutorials will be covered using '''OpenFOAM version 2.1.1''' and''' ubuntu version 12.04'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4 : System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Pre-requisite
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You should know how to create '''geometry''' using '''OpenFOAM '''

If not, please refer to the '''relevant tutorials''' on our '''website'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 : About flow in a channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* We simulate flow in a '''Channel''' to determine
* '''Flow development length''' along the downstream
|-
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel Flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Channel flow''' problem description.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary names''' and '''inlet conditions''' are shown in this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''flow develpoment length''' is given by the formula

'''L = 0.05 * Re * D'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Re''' which is the '''Reynolds number'''

and '''D''' which is the '''channel height'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using the '''formula''' length of the channel comes out to be '''5 meters '''

and '''height''' is kept as '''1 meters'''.

The '''Inlet velocity is 1''' '''meters per second'''

And we are solving this for a '''Reynolds number''' '''( Re ) equal 100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9 : File structure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is a '''steady state problem '''

Therefore we are using a '''steady state incompressible''' solver for this case
This is the '''file structure''' of our case
The '''folder''' should be created in the solver type that we choose
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create a floder and name it as channel in simpleFoam folder

right click >> new folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already created a '''folder''' in

'''simpleFoam folder''' of''' incompressible flow solvers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Nmae the folder channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''folder''' is named as''' channel'''

Now let me switch to the '''folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| copy 0,constant and system from pitzDaily to this channel folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy 0,Constant and System''' '''folders''' of any other case file in the '''simpleFoam directory'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have copied the''' file structure''' of case of''' pitzDaily'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Paste it in the channel folder and

make the necessary changes in the '''geometry''',

'''boundary faces''' and '''boundary condition'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me '''open the command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys simultaneously
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt +t''' keys simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal

Type '''run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''tutorials and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''incompressible and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type cd space '''simpleFoam and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| channel and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''channel and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You will see three folders '''0 , Constant and System'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type in command terminal

cd constant and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''constant and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| polymesh folder and 2 other files
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see '''files''' containing

'''properties of fluid''' and a''' folder named polymesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit RASProperties and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''RASProperties''' contains '''Reynolds-averaged stress '''model

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Transportproperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''transportProperties''' contain the '''transport model '''

and

'''kinematic viscosity (that is nu), in this case, is set at 0.001 m²/s (meter square per second)'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd polyMesh and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will see the '''blockMeshDict''' file here

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open the '''blockMeshDict''' file in the

terminal '''type gedit blockMeshDict and press enter'''

Scroll down

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file covertTometers is set to 1

Set the vertices for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The geomery is in '''meters '''so the '''convertTometers''' is set to 1

next we have''' defined''' the '''vertices of the channel '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh size for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We have used a '''100 X 100''' mesh size here and '''cell spacing''' is kept as '''( 1 1 1 )'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions and types
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Next we have set up '''boundary conditions''' and their types which are set as '''inlet ,outlet,top and bottom '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| FrontAndBack boundary type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As this is a '''2D geometry frontAndBack''' is kept as '''empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Due to a 2 dimensional geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also this being a '''simple geometry '''

'''mergePatchPair''' and '''edges''' are to kept '''empty'''.

Close the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' Type '''cd space ..(dot dot) '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again type '''cd space .. (dot dot)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terninal window type cd 0

type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd '''space '''0 (Zero) and press enter'''

Now Type''' ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal you can see these slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''intial boundary conditions '''

and''' wall functions''' for the '''channel case'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Wall functions : epsilon, k, nut, nutilda

initial flow conditions: p, R and U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It should contain various files such as

'''epsilon ,k, nut,nuTilda '''

which are the '''wall functions'''

and

'''p , R and capital U''' which the are '''initial conditions of the flow'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 : Calculate K.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Calculate k''' which is the '''turbulent kinetic energy'''

from the '''formula''' given in the slide

Where '''Ux, Uy and Uz''' are the '''velocity'''

'''components in the x, y and z direction'''

And '''U' ( dash ) = 0.05''' times '''u''' actual

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 : Calculate epsilon

epsilon - rate of disspiation turbulent kinetic energy

C mu - constant

l – length of channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Calculate '''epsilon''' from the '''formula''' given

Where '''epsilon''' is the''' rate of disspiation turbulent kinetic energy'''

'''C mu''' is a '''constant''' and its value is''' 0.09'''

And''' l''' is the '''length of the channel'''

Let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change only the boundary names
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change only the '''boundary names''' in each of the above '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not chnge the values of nu,nuTilde and R
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that the values of '''nut, nuTilda and R '''

are to kept default

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rest of the '''files''' should contain initial value

for each of the '''boundary faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window type '''cd ..''' and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal Type '''cd (space) ..(dot dot) and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No change in system folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is no change to be done in the '''system folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry

terminal window type : blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, We need to '''mesh the geometry'''

To do this

In the '''command terminal''' '''type blockMesh and press enter'''

'''Meshing''' is done

Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12 : Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''type of solver''' we are using here is '''simpleFoam'''

It is a '''Steady-state''' solver for '''incompressible, turbulent flow'''

let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' '''type simpleFoam and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations in terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations running''' will be seen in the '''command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running may take some time

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations converge or stop at end of time step
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' will stop once the solution is

'''converged''' or it reaches its '''end time value'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal

type: paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the results in '''paraview''' in the '''terminal '''

type '''paraFoam and press enter'''

This will open up the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In paraview window

View the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On let hand side of the '''paraview''' '''window''' click '''Apply'''

The '''geometry '''can be seen here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu change '''

the '''drop down menu''' from '''solid color to capital U'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Look at left side of the channel geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''initial state''' of '''velocity magnitude''' at '''inlet.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control click PLAY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of the '''paraview window''' click on the

'''play''' '''button''' of the '''VCR control'''

you can see the final value of the '''velocity magnitude'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Color legend from top left
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also''' toggle on''' the '''color legend''' from the

left hand side top of '''active variable control menu'''

'''Click APPLY''' again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu

click on rescale to data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to '''display'''

Scroll down

You can see '''Rescale''' , click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the color legend for this
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We can see that once the '''flow has fully devloped '''

it attains a '''maximum uniform velocity''' at the '''center'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13 :Validation
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The results obtained can be '''validated '''with

the '''analytical solution''' for '''laminar flow''' in a

'''channel which is u(max)=1.5 Uavg'''

Using '''openfoam''' we obatain a '''velocity of 1.48 meters per second''' which is a good match

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14 : Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt

The '''File structure of channel '''

'''Obtained solution''' using '''steady state solver'''

Viewed the geometry in '''paraview '''

'''Validation''' with '''analytic results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15 :

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment:

Solve the problem for '''Reynold Number 1500''' and

'''validate it with the analytical result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16 : About the Spoken Tutorial Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17 : Spoken Tutorial Workshops
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 18 :

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 19 :

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 20 :

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 21:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 22 :

Acknowledgement

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/2D-Laminar-Flow-in-a-channel/English

2019-05-30T06:02:42Z

DeepaVedartham:

Tutorial: Simulating Laminar flow in a channel.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,laminar flow,simpleFoam,channel

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''Simulating Laminar Flow in a Channel using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''2D geometry of channel '''

'''Meshing the Geometry'''

'''Solving''' and '''Post Processing results''' in '''Paraview'''

and Validation with '''analytic result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3 : System requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu 12.04''' .

'''OpenFOAM version 2.1.1'''

'''ParaView version 3.12.0 '''

Note that '''OpenFOAM''' version '''2.1.1''' is supported on '''ubuntu version 12.04'''

Hence forth all the tutorials will be covered using '''OpenFOAM version 2.1.1''' and''' ubuntu version 12.04'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4 : System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Pre-requisite
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You should know how to create '''geometry''' using '''OpenFOAM '''

If not, please refer to the '''relevant tutorials''' on our '''website'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 : About flow in a channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* We simulate flow in a '''Channel''' to determine
* '''Flow development length''' along the downstream
|-
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel Flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Channel flow''' problem description.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Channel flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary names''' and '''inlet conditions''' are shown in this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''flow develpoment length''' is given by the formula

'''L = 0.05 * Re * D'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Re''' which is the '''Reynolds number'''

and '''D''' which is the '''channel height'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 : Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using the '''formula''' length of the channel comes out to be '''5 meters '''

and '''height''' is kept as '''1 meters'''.

The '''Inlet velocity is 1''' '''meters per second'''

And we are solving this for a '''Reynolds number''' '''( Re ) equal 100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9 : File structure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is a '''steady state problem '''

Therefore we are using a '''steady state incompressible''' solver for this case
This is the '''file structure''' of our case
The '''folder''' should be created in the solver type that we choose
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create a floder and name it as channel in simpleFoam folder

right click >> new folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already created a '''folder''' in

'''simpleFoam folder''' of''' incompressible flow solvers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Nmae the folder channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''folder''' is named as''' channel'''

Now let me switch to the '''folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| copy 0,constant and system from pitzDaily to this channel folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy 0,Constant and System''' '''folders''' of any other case file in the '''simpleFoam directory'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have copied the''' file structure''' of case of''' pitzDaily'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Paste it in the channel folder and

make the necessary changes in the '''geometry''',

'''boundary faces''' and '''boundary condition'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me '''open the command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys simultaneously
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt +t''' keys simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal

Type '''run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''tutorials and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd space '''incompressible and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type cd space '''simpleFoam and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| channel and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''channel and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You will see three folders '''0 , Constant and System'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type in command terminal

cd constant and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type cd '''constant and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| now type '''ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| polymesh folder and 2 other files
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see '''files''' containing

'''properties of fluid''' and a''' folder named polymesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit RASProperties and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''RASProperties''' contains '''Reynolds-averaged stress '''model

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Transportproperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''transportProperties''' contain the '''transport model '''

and

'''kinematic viscosity (that is nu), in this case, is set at 0.001 m²/s (meter square per second)'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd polyMesh and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will see the '''blockMeshDict''' file here

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open the '''blockMeshDict''' file in the

terminal '''type gedit blockMeshDict and press enter'''

Scroll down

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file covertTometers is set to 1

Set the vertices for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The geomery is in '''meters '''so the '''convertTometers''' is set to 1

next we have''' defined''' the '''vertices of the channel '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh size for channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We have used a '''100 X 100''' mesh size here and '''cell spacing''' is kept as '''( 1 1 1 )'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions and types
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Next we have set up '''boundary conditions''' and their types which are set as '''inlet ,outlet,top and bottom '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| FrontAndBack boundary type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As this is a '''2D geometry frontAndBack''' is kept as '''empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Due to a 2 dimensional geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also this being a '''simple geometry '''

'''mergePatchPair''' and '''edges''' are to kept '''empty'''.

Close the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' Type '''cd space ..(dot dot) '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again type '''cd space .. (dot dot)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terninal window type cd 0

type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal type '''cd '''space '''0 (Zero) and press enter'''

Now Type''' ls and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal you can see these slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''intial boundary conditions '''

and''' wall functions''' for the '''channel case'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Wall functions : epsilon, k, nut, nutilda

initial flow conditions: p, R and U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It should contain various files such as

'''epsilon ,k, nut,nuTilda '''

which are the '''wall functions'''

and

'''p , R and capital U''' which the are '''initial conditions of the flow'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 : Calculate K.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Calculate k''' which is the '''turbulent kinetic energy'''

from the '''formula''' given in the slide

Where '''Ux, Uy and Uz''' are the '''velocity'''

'''components in the x, y and z direction'''

And '''U' ( dash ) = 0.05''' times '''u''' actual

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 : Calculate epsilon

epsilon - rate of disspiation turbulent kinetic energy

C mu - constant

l – length of channel
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Calculate '''epsilon''' from the '''formula''' given

Where '''epsilon''' is the''' rate of disspiation turbulent kinetic energy'''

'''C mu''' is a '''constant''' and its value is''' 0.09'''

And''' l''' is the '''length of the channel'''

Let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change only the boundary names
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change only the '''boundary names''' in each of the above '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not chnge the values of nu,nuTilde and R
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that the values of '''nut, nuTilda and R '''

are to kept default

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rest of the '''files''' should contain initial value

for each of the '''boundary faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window type '''cd ..''' and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the terminal Type '''cd (space) ..(dot dot) and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No change in system folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is no change to be done in the '''system folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry

terminal window type : blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, We need to '''mesh the geometry'''

To do this

In the '''command terminal''' '''type blockMesh and press enter'''

'''Meshing''' is done

Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12 : Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''type of solver''' we are using here is '''simpleFoam'''

It is a '''Steady-state''' solver for '''incompressible, turbulent flow'''

let me minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type simpleFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' '''type simpleFoam and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations in terminal window
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations running''' will be seen in the '''command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running may take some time

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Iterations converge or stop at end of time step
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''iterations''' will stop once the solution is

'''converged''' or it reaches its '''end time value'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal

type: paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the results in '''paraview''' in the '''terminal '''

type '''paraFoam and press enter'''

This will open up the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In paraview window

View the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On let hand side of the '''paraview''' '''window''' click '''Apply'''

The '''geometry '''can be seen here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu change '''

the '''drop down menu''' from '''solid color to capital U'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Look at left side of the channel geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''initial state''' of '''velocity magnitude''' at '''inlet.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control click PLAY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of the '''paraview window''' click on the

'''play''' '''button''' of the '''VCR control'''

you can see the final value of the '''velocity magnitude'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Color legend from top left
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also''' toggle on''' the '''color legend''' from the

left hand side top of '''active variable control menu'''

'''Click APPLY''' again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In object inspector menu

click on rescale to data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to '''display'''

Scroll down

You can see '''Rescale''' , click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the color legend for this
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We can see that once the '''flow has fully devloped '''

it attains a '''maximum uniform velocity''' at the '''center'''

Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13 :Validation
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The results obtained can be '''validated '''with

the '''analytical solution''' for '''laminar flow''' in a

'''channel which is u(max)=1.5 Uavg'''

Using '''openfoam''' we obatain a '''velocity of 1.48 meters per second''' which is a good match

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14 : Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt

The '''File structure of channel '''

'''Obtained solution''' using '''steady state solver'''

Viewed the geometry in '''paraview '''

'''Validation''' with '''analytic results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15 :

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment:

Solve the problem for '''Reynold Number 1500''' and

'''validate it with the analytical result'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 16 : About the Spoken Tutorial Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 17 : Spoken Tutorial Workshops
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 18 :

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 19 :

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 20 :

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 21:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 22 :

Acknowledgement

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English

2019-05-30T05:57:47Z

DeepaVedartham:

Tutorial: Simulating Flow in a Lid Driven Cavity.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,Lid Driven Cavity,Ghia et.al.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the '''spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

The''' Lid Driven Cavity''' '''file structure'''

'''Meshing '''the Geometry

Solving and '''post-processing results''' in '''Paraview'''

'''Plotting '''& '''validating''' results on a '''spreadsheet'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.04''' .

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

About Lid Driven Cavity flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is the most widely used '''2D test'''

case for validation of a '''CFD code'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is diagram of '''Lid Driven Cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary''' '''conditions''' remain the same

A '''moving wall''' and '''three fixedwalls'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are '''solving''' this for '''Reynolds no (Re) = 100'''

The '''moving wall''' has a velocity of '''1 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The path for the '''Lid Driven Cavity''' is the same as

discussed in the '''installation tutorial'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open a command terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Open a '''command terminal''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press ctrl +Alt+t keys simultaneously on keyboard
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity in terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorials and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' tutorials and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' incompressible and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type cd '''(space) cavity and '''Press Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''ls''' and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Three folders 0, constant and system
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''file structure of cavity''' you will see 3 folders :

'''0 , constant , and system'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''constant''' and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls '''and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Constant >> polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''constant folder '''contains another '''folder''' named '''polymesh'''

'''and a file describing the physical properties of fluid.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd (space) polymesh''' and '''Press Enter'''

'''Polymesh contains a file named blockMeshDict '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''blockMeshDict'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the file type '''gedit blockMeshDict'''

'''(Note '''that''' M and D '''here are''' capital)'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will Open up the '''blockMeshDict file'''

'''Let me drag this to the capture area'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains :

'''-cordinates for lid driven cavity'''

'''-blocking and meshing parameters'''

'''-and boundary patches.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No patches and arcs in the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''arcs''' as well as no '''patches''' to be''' merged'''

'''edges and mergePatchPairs can be kept empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal type cd .. and do this twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will come back to the''' cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd system and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''system''' and press enter,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

this contains three '''files'''

'''controlDict, fvSchemes and fvSolutions'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ControlDict

fvSolution

fvSchemes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''controlDict''' contains '''control parameters''' for start/end time.

'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.

'''fvSchemes''' contains equation for '''solver''',

'''tolerance''' etc.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again type '''cd (space) (dot dot) . . '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ( space )''' 0 (zero) and Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Initial values for bounary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''initial values''' for '''boundary conditions''' like

'''Pressure ,Velocity,Temperature etc.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type''' cd ( space ) (dot dot) . .''' to return to the '''cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh '''the''' geometry'''

'''We are using a course mesh here.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Mesh''' the '''geometry''' by typing '''blockMesh''' in the '''terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''blockMesh '''(Note that M here is capital)

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Meshing''' is done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If there is some '''error''' in the '''blockMesh file '''

it will be shown in the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the '''geometry'''

Type '''paraFoam''' , Note that '''F''' here is '''capital'''

and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will open the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on apply button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the left hand side of the '''object inspector menu''' click on '''Apply.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''lid driven cavity''' '''geometry'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the mesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Check the mesh by typing '''checkMesh''' in the''' terminal'''

Note that '''M''' here is capital

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the checkMesh command
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you can see the the '''number of cells''' ,

'''skewness''' and '''other parameters'''

which are associated with the '''mesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide ; icoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The solver we are using here is '''icoFoam''' :

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal '''type '''icoFoam'''

Note that '''F''' here is '''capital'''

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running will be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once the solving is done

type '''paraFoam''' in the terminal

to view the '''geometry''' and the '''results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu'''

'''click on Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Scroll down in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Scroll''' down the '''properties panel'''

of the '''objector inspector menu '''

'''for time step,regions and volume fields etc'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check or uncheck these boxes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check or uncheck '''these '''boxes''' in the '''mesh''' part

to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to capital U

initial condition

I will select capital U

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now after this on top of the''' active variable control '''

'''dropdown menu change from solid color to capital p or U'''

which are the '''initial conditions''' such as '''pressure or velocity'''

'''I will select capital U'''
Now this will show you the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the''' paraview window''' you can see the''' VCR control'''

'''Click on the play button'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Final result of velocity in lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now this is the final '''result''' of '''velocity''' for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Toggle on the '''color''' '''legend '''by clicking on

top left of the '''active variable control menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the''' color legend''' for '''U velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Validation of result
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to''' validate''' the '''results obtained'''

To do this let us '''plot''' the '''U and V velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to '''validate''' the result obtained

to do this let us plot the U and V velocity.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Menu > filters > data analysis > plot over line
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this Go to '''Filters Menu > Data Analysis > Plot Over line'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X , Y and Z axis'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select the X and Y axis

Select the X axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Select the '''X & Y axis''' turn by turn.

I will select the '''X axis''' and click '''Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Pressure and velocity''' '''plots''' being plotted

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For non-dimensional analysis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since it is a '''non dimensional analysis'''

we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot data Line click Y axis and apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in '''Plot Data''' click on the '''Y-axis'''

And click '''APPLY'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot can be seen

Go to file save data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the''' plot'''

In menu bar go to '''File > Save Data '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Give and appropriate name to your file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Give a name to the file

save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I will give this as '''cavity'''

The file will be saved as '''.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now click ok

Again click ok

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the cavity folder in icoFoam

cavity.csv file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to the '''cavity folder''' of '''openfoam directory'''.

'''Scroll '''down you can see the '''cavity.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open it in Open office or LibreOffice Spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy u0 and points 1 and save it another page of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the libreoffice spreadsheet copy

the U0 (u velocity) and to the right points1(Y-axis) columns

in another spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| U/U and y/L
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now divide both these coloumns

that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot the results using chart option

of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Plot the results in '''libreoffice''' '''charts''' option on top of the menu bar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Lid Driven Cavity (OpenFOAM)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Results obtained will be similar to this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Ghia et al.(1982) & Fluent
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Validate''' the result obtained on '''Lid Driven Cavity by : Ghia et al. (1982''') and

Results '''obtained from Fluent'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt how to install

'''File structure of Lid Driven cavity'''

'''Solved lid driven cavity'''.

'''Post-processing of results '''

'''Validation'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As as Assignment,

Change some '''parameters''' in the '''lid driven cavity'''

* '''Velocity Magnitude''' in the '''0 folder'''
* '''Kinematic viscosity in transportPorpoerties in constant folder'''

Plot the results of '''u/U and y/L'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 :

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact @spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14:

About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English

2019-05-30T05:50:21Z

DeepaVedartham:

Tutorial: Simulating Flow in a Lid Driven Cavity.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,Lid Driven Cavity,Ghia et.al.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the '''spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

The''' Lid Driven Cavity''' '''file structure'''

'''Meshing '''the Geometry

Solving and '''post-processing results''' in '''Paraview'''

'''Plotting '''& '''validating''' results on a '''spreadsheet'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.04''' .

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

About Lid Driven Cavity flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is the most widely used '''2D test'''

case for validation of a '''CFD code'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is diagram of '''Lid Driven Cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary''' '''conditions''' remain the same

A '''moving wall''' and '''three fixedwalls'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are '''solving''' this for '''Reynolds no (Re) = 100'''

The '''moving wall''' has a velocity of '''1 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The path for the '''Lid Driven Cavity''' is the same as

discussed in the '''installation tutorial'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open a command terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Open a '''command terminal''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press ctrl +Alt+t keys simultaneously on keyboard
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity in terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorials and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' tutorials and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' incompressible and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type cd '''(space) cavity and '''Press Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''ls''' and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Three folders 0, constant and system
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''file structure of cavity''' you will see 3 folders :

'''0 , constant , and system'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''constant''' and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls '''and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Constant >> polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''constant folder '''contains another '''folder''' named '''polymesh'''

'''and a file describing the physical properties of fluid.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd (space) polymesh''' and '''Press Enter'''

'''Polymesh contains a file named blockMeshDict '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''blockMeshDict'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the file type '''gedit blockMeshDict'''

'''(Note '''that''' M and D '''here are''' capital)'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will Open up the '''blockMeshDict file'''

'''Let me drag this to the capture area'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains :

'''-cordinates for lid driven cavity'''

'''-blocking and meshing parameters'''

'''-and boundary patches.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No patches and arcs in the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''arcs''' as well as no '''patches''' to be''' merged'''

'''edges and mergePatchPairs can be kept empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal type cd .. and do this twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will come back to the''' cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd system and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''system''' and press enter,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

this contains three '''files'''

'''controlDict, fvSchemes and fvSolutions'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ControlDict

fvSolution

fvSchemes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''controlDict''' contains '''control parameters''' for start/end time.

'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.

'''fvSchemes''' contains equation for '''solver''',

'''tolerance''' etc.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again type '''cd (space) (dot dot) . . '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ( space )''' 0 (zero) and Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Initial values for bounary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''initial values''' for '''boundary conditions''' like

'''Pressure ,Velocity,Temperature etc.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type''' cd ( space ) (dot dot) . .''' to return to the '''cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh '''the''' geometry'''

'''We are using a course mesh here.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Mesh''' the '''geometry''' by typing '''blockMesh''' in the '''terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''blockMesh '''(Note that M here is capital)

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Meshing''' is done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If there is some '''error''' in the '''blockMesh file '''

it will be shown in the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the '''geometry'''

Type '''paraFoam''' , Note that '''F''' here is '''capital'''

and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will open the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on apply button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the left hand side of the '''object inspector menu''' click on '''Apply.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''lid driven cavity''' '''geometry'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the mesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Check the mesh by typing '''checkMesh''' in the''' terminal'''

Note that '''M''' here is capital

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the checkMesh command
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you can see the the '''number of cells''' ,

'''skewness''' and '''other parameters'''

which are associated with the '''mesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide ; icoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The solver we are using here is '''icoFoam''' :

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal '''type '''icoFoam'''

Note that '''F''' here is '''capital'''

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running will be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once the solving is done

type '''paraFoam''' in the terminal

to view the '''geometry''' and the '''results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu'''

'''click on Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Scroll down in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Scroll''' down the '''properties panel'''

of the '''objector inspector menu '''

'''for time step,regions and volume fields etc'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check or uncheck these boxes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check or uncheck '''these '''boxes''' in the '''mesh''' part

to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to capital U

initial condition

I will select capital U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now after this on top of the''' active variable control '''

'''dropdown menu change from solid color to capital p or U'''

which are the '''initial conditions''' such as '''pressure or velocity'''

'''I will select capital U'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the''' paraview window''' you can see the''' VCR control'''

'''Click on the play button'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Final result of velocity in lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now this is the final '''result''' of '''velocity''' for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Toggle on the '''color''' '''legend '''by clicking on

top left of the '''active variable control menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the''' color legend''' for '''U velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Validation of result
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to''' validate''' the '''results obtained'''

To do this let us '''plot''' the '''U and V velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to '''validate''' the result obtained

to do this let us plot the U and V velocity.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Menu > filters > data analysis > plot over line
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this Go to '''Filters Menu > Data Analysis > Plot Over line'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X , Y and Z axis'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select the X and Y axis

Select the X axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Select the '''X & Y axis''' turn by turn.

I will select the '''X axis''' and click '''Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Pressure and velocity''' '''plots''' being plotted

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For non-dimensional analysis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since it is a '''non dimensional analysis'''

we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot data Line click Y axis and apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in '''Plot Data''' click on the '''Y-axis'''

And click '''APPLY'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot can be seen

Go to file save data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the''' plot'''

In menu bar go to '''File > Save Data '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Give and appropriate name to your file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Give a name to the file

save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I will give this as '''cavity'''

The file will be saved as '''.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now click ok

Again click ok

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the cavity folder in icoFoam

cavity.csv file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to the '''cavity folder''' of '''openfoam directory'''.

'''Scroll '''down you can see the '''cavity.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open it in Open office or LibreOffice Spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy u0 and points 1 and save it another page of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the libreoffice spreadsheet copy

the U0 (u velocity) and to the right points1(Y-axis) columns

in another spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| U/U and y/L
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now divide both these coloumns

that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot the results using chart option

of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Plot the results in '''libreoffice''' '''charts''' option on top of the menu bar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Lid Driven Cavity (OpenFOAM)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Results obtained will be similar to this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Ghia et al.(1982) & Fluent
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Validate''' the result obtained on '''Lid Driven Cavity by : Ghia et al. (1982''') and

Results '''obtained from Fluent'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt how to install

'''File structure of Lid Driven cavity'''

'''Solved lid driven cavity'''.

'''Post-processing of results '''

'''Validation'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As as Assignment,

Change some '''parameters''' in the '''lid driven cavity'''

* '''Velocity Magnitude''' in the '''0 folder'''
* '''Kinematic viscosity in transportPorpoerties in constant folder'''

Plot the results of '''u/U and y/L'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 :

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact @spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14:

About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English

2019-05-30T05:43:25Z

DeepaVedartham:

Tutorial: Simulating Flow in a Lid Driven Cavity.

Script and Narration : Rahul Joshi

Keywords: Video tutorial,CFD,Lid Driven Cavity,Ghia et.al.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the '''spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

The''' Lid Driven Cavity''' '''file structure'''

'''Meshing '''the Geometry

Solving and '''post-processing results''' in '''Paraview'''

'''Plotting '''& '''validating''' results on a '''spreadsheet'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.04''' .

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

About Lid Driven Cavity flow
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is the most widely used '''2D test'''

case for validation of a '''CFD code'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : Diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is diagram of '''Lid Driven Cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Boundary Conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''boundary''' '''conditions''' remain the same

A '''moving wall''' and '''three fixedwalls'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are '''solving''' this for '''Reynolds no (Re) = 100'''

The '''moving wall''' has a velocity of '''1 meters per second'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The path for the '''Lid Driven Cavity''' is the same as

discussed in the '''installation tutorial'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open a command terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Open a '''command terminal''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press ctrl +Alt+t keys simultaneously on keyboard
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Path for lid driven cavity in terminal
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type run and press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd tutorials and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' tutorials and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd incompressible and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' incompressible and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''type cd '''(space) cavity and '''Press Enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''ls''' and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Three folders 0, constant and system
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''file structure of cavity''' you will see 3 folders :

'''0 , constant , and system'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''constant''' and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls '''and''' press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Constant >> polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''constant folder '''contains another '''folder''' named '''polymesh'''

'''and a file describing the physical properties of fluid.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd polyMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd (space) polymesh''' and '''Press Enter'''

'''Polymesh contains a file named blockMeshDict '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''blockMeshDict'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type gedit blockMeshDict and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the file type '''gedit blockMeshDict'''

'''(Note '''that''' M and D '''here are''' capital)'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will Open up the '''blockMeshDict file'''

'''Let me drag this to the capture area'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains :

'''-cordinates for lid driven cavity'''

'''-blocking and meshing parameters'''

'''-and boundary patches.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| No patches and arcs in the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''arcs''' as well as no '''patches''' to be''' merged'''

'''edges and mergePatchPairs can be kept empty'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal type cd .. and do this twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you will come back to the''' cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd system and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd''' (space) '''system''' and press enter,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press enter

this contains three '''files'''

'''controlDict, fvSchemes and fvSolutions'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| ControlDict

fvSolution

fvSchemes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''controlDict''' contains '''control parameters''' for start/end time.

'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.

'''fvSchemes''' contains equation for '''solver''',

'''tolerance''' etc.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now again type '''cd (space) (dot dot) . . '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cd 0 and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ( space )''' 0 (zero) and Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Initial values for bounary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''initial values''' for '''boundary conditions''' like

'''Pressure ,Velocity,Temperature etc.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ..
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type''' cd ( space ) (dot dot) . .''' to return to the '''cavity folder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mesh the geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we need to '''mesh '''the''' geometry'''

'''We are using a course mesh here.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Mesh''' the '''geometry''' by typing '''blockMesh''' in the '''terminal'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''blockMesh '''(Note that M and D here is capital)

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Meshing''' is done.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If there is some '''error''' in the '''blockMesh file '''

it will be shown in the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the '''geometry'''

Type '''paraFoam''' , Note that '''F''' here is '''capital'''

and '''press enter'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This will open the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on apply button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the left hand side of the '''object inspector menu''' click on '''Apply.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''lid driven cavity''' '''geometry'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check the mesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Check the mesh by typing '''checkMesh''' in the''' terminal'''

Note that '''M''' here is capital

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the checkMesh command
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| you can see the the '''number of cells''' ,

'''skewness''' and '''other parameters'''

which are associated with the '''mesh'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''slides'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide ; icoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The solver we are using here is '''icoFoam''' :

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the '''terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In terminal type icoFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal '''type '''icoFoam'''

Note that '''F''' here is '''capital'''

and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations '''running will be seen in the '''terminal window'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once the solving is done

type '''paraFoam''' in the terminal

to view the '''geometry''' and the '''results'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on APPLY
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of '''object inspector menu'''

'''click on Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Scroll down in object inspector menu
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Scroll''' down the '''properties panel'''

of the '''objector inspector menu '''

'''for time step,regions and volume fields etc'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check or uncheck these boxes
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check or uncheck '''these '''boxes''' in the '''mesh''' part

to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change from solid color to capital U

initial condition

I will select capital U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now after this on top of the''' active variable control '''

'''dropdown menu change from solid color to capital p or U'''

which are the '''initial conditions''' such as '''pressure or velocity'''

'''I will select capital U'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| VCR control on top
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the''' paraview window''' you can see the''' VCR control'''

'''Click on the play button'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Final result of velocity in lid driven cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now this is the final '''result''' of '''velocity''' for '''lid driven cavity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Toggle on the '''color''' '''legend '''by clicking on

top left of the '''active variable control menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is the''' color legend''' for '''U velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Validation of result
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to''' validate''' the '''results obtained'''

To do this let us '''plot''' the '''U and V velocity'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We need to '''validate''' the result obtained

to do this let us plot the U and V velocity.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Menu > filters > data analysis > plot over line
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this Go to '''Filters Menu > Data Analysis > Plot Over line'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X , Y and Z axis'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Select the X and Y axis

Select the X axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Select the '''X & Y axis''' turn by turn.

I will select the '''X axis''' and click '''Apply'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''Pressure and velocity''' '''plots''' being plotted

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For non-dimensional analysis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since it is a '''non dimensional analysis'''

we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot data Line click Y axis and apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this in '''Plot Data''' click on the '''Y-axis'''

And click '''APPLY'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot can be seen

Go to file save data
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the''' plot'''

In menu bar go to '''File > Save Data '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Give and appropriate name to your file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Give a name to the file

save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I will give this as '''cavity'''

The file will be saved as '''.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now click ok

Again click ok

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the cavity folder in icoFoam

cavity.csv file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now go to the '''cavity folder''' of '''openfoam directory'''.

'''Scroll '''down you can see the '''cavity.csv file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open it in Open office or LibreOffice Spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy u0 and points 1 and save it another page of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the libreoffice spreadsheet copy

the U0 (u velocity) and to the right points1(Y-axis) columns

in another spreadsheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| U/U and y/L
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now divide both these coloumns

that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PLot the results using chart option

of spreadsheet
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Plot the results in '''libreoffice''' '''charts''' option on top of the menu bar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7 : Lid Driven Cavity (OpenFOAM)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Results obtained will be similar to this figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Ghia et al.(1982) & Fluent
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Validate''' the result obtained on '''Lid Driven Cavity by : Ghia et al. (1982''') and

Results '''obtained from Fluent'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt how to install

'''File structure of Lid Driven cavity'''

'''Solved lid driven cavity'''.

'''Post-processing of results '''

'''Validation'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As as Assignment,

Change some '''parameters''' in the '''lid driven cavity'''

* '''Velocity Magnitude''' in the '''0 folder'''
* '''Kinematic viscosity in transportPorpoerties in constant folder'''

Plot the results of '''u/U and y/L'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11 :

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact @spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14:

About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/English

2019-05-30T05:38:21Z

DeepaVedartham:

Tutorial: Creating curved geometry in OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flow over cylinder, edges, blocks.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual Cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating Curved geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''Steps''' for creating a create a '''curved geometry in openfoam'''

Viewing the '''results in paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.0'''4.

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5:

Hover over cylinder

Hover over the geometry

Hover over blocks

break the circle into 4 parts
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will create a '''geometry''' for '''flow over cylinder'''.

Note that I am using this case just for '''explanation'''.

The '''cylinder '''is in a form of a '''semi circle.'''

'''Meshing is a body fitted grid'''.

The entire '''geometry''' is divided into blocks.

We break the '''semi circle''' into equal number of '''parts'''.

Now minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the lid driven cavity blockMeshDict file

Hover over arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''blockMeshDict '''file of the previous tutorial

I have already opened it

Scroll down, for '''simple geometries''' you can see that

'''edges '''is kept empty

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Create a new '''blockMeshDict''' file

To do this let us '''minimise''' this first

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| On the desktop

Right click > create document >create file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Right click > create document > empty file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Name this as blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| name this as '''blockMeshDict'''.

Note that '''M and D here are capital'''

'''Open this'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy the blockMeshDict of Lid driven cavity file from line 0 to line

convert to meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now you can copy the initial few lines from the '''lid driven cavity upto convertTometers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy these lines
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Go up '''copy''' this upto '''convertToMeters'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Paste in the new blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy this''' and '''paste it''' in the new '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change the geometry to point one to one
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change the '''convert to meters''' from '''point one to one'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Geometry is in meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As our '''geometry''' is in '''meters''' we will keep this as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now press enter ,

press enter again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the figure of flow over cylinder in slide 4

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this you need to enter the '''co-ordinates''' of the''' geometry''' in '''vertices'''

Note that the points should be in an ordered way starting from '''0,1,2,3''' etc. as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type vertices after convertTometers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''vertices''' in the '''blockMeshDict''' file and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open bracket '''

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the co-ordinates as shown in the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the '''co-ordinates''' of points as shown in the '''diagram'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the next slide for half semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For '''explanation''' I will use the '''right half of the semi-circle'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the values for the points in the figure starting '''from 0'''

Let me switch back to the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinates''' of '''point 0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 0 - Insert (0.5 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket and enter '''(0.5 (space) 0 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again leave some space , '''open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 1- Insert (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter co-ordinates for point 1 (1 (space) 0 (space) 0)

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave two '''vertical spaces''' ,

press enter

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinate '''for the point number 4

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 – Insert (0.707 0.707 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Open close bracket''',''' enter (0.707 (space) 0.707 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Leave some space

'''Open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 5 -Insert (0.353 0.353 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the co-ordinates for point 5'''

'''Enter (0.353 (space) 0.353 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Now leave 4 vertical spaces''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter co-ordinates for point number 9'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Vertical spaces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''1 2 3 4 ,''' again press enter

leave some space

'''Open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 9 – Insert (0 1 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''(0 (space) 1 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter '''co-ordinates''' for '''point number 10'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 10 -Insert (0 0.5 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket''' (0 (space) 0.5 (space) 0)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Remaining part of the semi-circle

use the same procedure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly '''enter the co-ordinates for remaining points''' in the geometry.

Insert a close bracket and put a''' semi-colon '''

Press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file type blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type blocks''' and press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide showing blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Block numbers''' are circled as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the type of block here
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter the type of '''block i.e. Hex'''

leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter points for blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the''' points''' for the '''blocks'''

'''Open close brackets'''

Leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| SimpleGrading (1 1 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| ths '''simple grading''' can be kept as '''(1 1 1) '''

press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the previous tutorial on simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For creating the '''blocks''' please refer to the '''tutorial'''

on '''creating simple geometry in OpenFOAM'''

'''Note that''' there will be more number of '''blocks''' in this example

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert close bracket and

semi-colon

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Insert a close bracket'''

'''Insert a semi-colon''' and press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in the next line type '''edges''' and press enter

insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''points''' which are the '''end points of the arcs'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the arc points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space and '''type arc''' and leave some space

Type the points which are the '''end points of the arc'''
Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert end points of the arc

From ths slide

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this insert the '''end points of the arc'''

We '''start''' with '''0 5'''

Let me switch back to the '''blockMeshDict file'''

Enter''' 0 space 5'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Insert '''open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In brackets enter the co-ordinate of any '''intermediate''' point in between the two '''arc points'''.

Now Let me switch back again to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: for arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the figure you can see that you have to pick up a point

in between the two points.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this geometry I have picked up '''right half''' of the circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide shwoing trignometric relations

Sin(theta) and cos(theta) relations
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using '''simple geometric relations'''

you can find the co-ordinates of the intermediate point shown in the semi-circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Repeat the above procedure for the remaining semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly you can '''repeat''' the procedure for rest of the '''semi-circle geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Note that there are more number of arcs in this example'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I'''nsert a close bracket'''

'''Insert a semi -colon and press enter'''

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the next line after arcs

refer to the tutorial on creating simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the boundary patches after arcs'''

'''Refer to the tutorial on Simple geometry in OpenFOAM '''

For entering the '''boundary patches'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter boundary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''boundary'''

'''Insert open-close bracket and press enter'''

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type mergePatchPairs

P here is capital
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the next line type '''mergePatchPairs'''

Note that '''P here is capital'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''no patches''' to be '''merged''' this can be kept empty

Insert a '''close bracket'''

Insert a '''semi -colon '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide :

Points for the front face in the geometry

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

Similarly enter the '''co-ordinate''' points for the points

in the '''front face''' of unit thickness of the '''geometry'''

as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''Command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter

cd tutorials and press enter

cd basic and press enter

cd potentialFoam and press enter

cd cylinder and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for your case file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already set the path for the '''tutorial case of flow over cylinder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''blockMesh '''for '''meshing''' the geometry''' and press enter'''

Meshing is done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: For OpenFOAM v 5.0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open cylinder case directory, type the following in your run folder:

'''$cd tutorials/basic/potentialFoam/cylinder'''

To run Allrun script file, type:

'''$./Allrun'''

This will run blockMesh and potentialFoam commands

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type paraFoam''' in the terminal

and press enter

to view the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me drag this to the capture area

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click APPLY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the '''left''' side of '''object inspector menu''' click '''Apply'''

The '''geometry''' created will be seen in the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down the '''Object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check and uncheck the mesh field box
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check and uncheck the Mesh field box'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see '''different regions''' of the geometry.

You can also see the''' wire frame '''of the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For wireframe of the geometry

Change from surface to wireframe
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu''' in the '''drop down menu'''

Change from '''Surface to wireframe'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''wireframe model''' of the geometry

close this

Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

How to '''create a curved geometry'''.

How to '''enter points for edges in OpenFOAM'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an Assignment

Create a geometry with '''inner semi-circle of radius 2 meters'''

'''and outer circle of radius 4 meters'''

and

View the results in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.com

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining

|}

OpenFOAM/C2/Creating-curved-geometry-in-OpenFOAM/English

2019-05-30T05:32:44Z

DeepaVedartham:

Tutorial: Creating curved geometry in OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flow over cylinder, edges, blocks.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visual Cue
| style="border:0.05pt solid #000000;padding:0.097cm;"| Narration

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating Curved geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

'''Steps''' for creating a create a '''curved geometry in openfoam'''

Viewing the '''results in paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial

I am using '''Linux Operating system Ubuntu version 10.0'''4.

'''OpenFOAM version 2.1.0 '''

'''ParaView version 3.12.0 '''

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5:

Hover over cylinder

Hover over the geometry

Hover over blocks

break the circle into 4 parts
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will create a '''geometry''' for '''flow over cylinder'''.

Note that I am using this case just for '''explanation'''.

The '''cylinder '''is in a form of a '''semi circle.'''

'''Meshing is a body fitted grid'''.

The entire '''geometry''' is divided into blocks.

We break the '''semi circle''' into equal number of '''parts'''.

Now minimise this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the lid driven cavity blockMeshDict file

Hover over arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''blockMeshDict '''file of the previous tutorial

I have already opened it

Scroll down, for '''simple geometries''' you can see that

'''edges '''is kept empty

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Create a new '''blockMeshDict''' file

To do this let us '''minimise''' this first

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| On the desktop

Right click > create document >create file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Right click > create document > empty file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Name this as blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| name this as '''blockMeshDict'''.

Note that '''M and D here are capital'''

'''Open this'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy the blockMeshDict of Lid driven cavity file from line 0 to line

convert to meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now you can copy the initial few lines from the '''lid driven cavity upto convertTometers'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy these lines
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Go up '''copy''' this upto '''convertToMeters'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Paste in the new blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Copy this''' and '''paste it''' in the new '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Change the geometry to point one to one
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Change the '''convert to meters''' from '''point one to one'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Geometry is in meters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As our '''geometry''' is in '''meters''' we will keep this as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now press enter ,

press enter again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the figure of flow over cylinder in slide 4

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this you need to enter the '''co-ordinates''' of the''' geometry''' in '''vertices'''

Note that the points should be in an ordered way starting from '''0,1,2,3''' etc. as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type vertices after convertTometers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''vertices''' in the '''blockMeshDict''' file and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open bracket '''

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the co-ordinates as shown in the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the '''co-ordinates''' of points as shown in the '''diagram'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the next slide for half semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For '''explanation''' I will use the '''right half of the semi-circle'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the values for the points in the figure starting '''from 0'''

Let me switch back to the '''blockMeshDict''' file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinates''' of '''point 0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 0 - Insert (0.5 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket and enter '''(0.5 (space) 0 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again leave some space , '''open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 1- Insert (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter co-ordinates for point 1 (1 (space) 0 (space) 0)

Press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave two '''vertical spaces''' ,

press enter

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| leave some space and enter '''co-ordinate '''for the point number 4

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 – Insert (0.707 0.707 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Open close bracket''',''' enter (0.707 (space) 0.707 (space) 0)'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Leave some space

'''Open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 5 -Insert (0.353 0.353 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the co-ordinates for point 5'''

'''Enter (0.353 (space) 0.353 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Now leave 4 vertical spaces''' and

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter co-ordinates for point number 9'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Vertical spaces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''1 2 3 4 ,''' again press enter

leave some space

'''Open close bracket '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 9 – Insert (0 1 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''(0 (space) 1 (space) 0)''', press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter '''co-ordinates''' for '''point number 10'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 10 -Insert (0 0.5 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open close bracket''' (0 (space) 0.5 (space) 0)''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Remaining part of the semi-circle

use the same procedure
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly '''enter the co-ordinates for remaining points''' in the geometry.

Insert a close bracket and put a''' semi-colon '''

Press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In blockMeshDict file type blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type blocks''' and press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide showing blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Block numbers''' are circled as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the type of block here
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Enter the type of '''block i.e. Hex'''

leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter points for blocks
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now enter the''' points''' for the '''blocks'''

'''Open close brackets'''

Leave some space

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| SimpleGrading (1 1 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| ths '''simple grading''' can be kept as '''(1 1 1) '''

press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Refer to the previous tutorial on simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For creating the '''blocks''' please refer to the '''tutorial'''

on '''creating simple geometry in OpenFOAM'''

'''Note that''' there will be more number of '''blocks''' in this example

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert close bracket and

semi-colon

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Insert a close bracket'''

'''Insert a semi-colon''' and press enter

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in the next line type '''edges''' and press enter

insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''points''' which are the '''end points of the arcs'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the arc points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space and '''type arc''' and leave some space

Type the points which are the '''end points of the arc'''
Let me switch back to the slide

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert end points of the arc

From ths slide

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this insert the '''end points of the arc'''

We '''start''' with '''0 5'''

Let me switch back to the '''blockMeshDict file'''

Enter''' 0 space 5'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Leave some space

Insert '''open close bracket'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In brackets enter the co-ordinate of any '''intermediate''' point in between the two '''arc points'''.

Now Let me switch back again to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: for arcs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the figure you can see that you have to pick up a point

in between the two points.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this geometry I have picked up '''right half''' of the circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide shwoing trignometric relations

Sin(theta) and cos(theta) relations
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Using '''simple geometric relations'''

you can find the co-ordinates of the intermediate point shown in the semi-circle

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Repeat the above procedure for the remaining semi-circle
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly you can '''repeat''' the procedure for rest of the '''semi-circle geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me switch back to the '''blockMeshDict file'''

Now press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Note that there are more number of arcs in this example'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I'''nsert a close bracket'''

'''Insert a semi -colon and press enter'''

again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the next line after arcs

refer to the tutorial on creating simple geometry in openfoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Enter the boundary patches after arcs'''

'''Refer to the tutorial on Simple geometry in OpenFOAM '''

For entering the '''boundary patches'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter boundary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''boundary'''

'''Insert open-close bracket and press enter'''

Again press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type mergePatchPairs

P here is capital
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the next line type '''mergePatchPairs'''

Note that '''P here is capital'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Press enter

Insert a '''open bracket''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Since there are '''no patches''' to be '''merged''' this can be kept empty

Insert a '''close bracket'''

Insert a '''semi -colon '''and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide :

Points for the front face in the geometry

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

Similarly enter the '''co-ordinate''' points for the points

in the '''front face''' of unit thickness of the '''geometry'''

as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press Ctrl+Alt+t keys
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open a '''Command terminal'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press enter

cd tutorials and press enter

cd basic and press enter

cd potentialFoam and press enter

cd cylinder and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type the path for your case file

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already set the path for the '''tutorial case of flow over cylinder'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blockMesh and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''terminal''' type '''blockMesh '''for '''meshing''' the geometry''' and press enter'''

Meshing is done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: For OpenFOAM v 5.0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To open cylinder case directory, type the following in your run folder:

'''$cd tutorials/basic/potentialFoam/cylinder'''

To run Allrun script file, type:

'''$./Allrun'''

This will run blockMesh and potentialFoam commands

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type paraFoam and press enter
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now '''Type paraFoam''' in the terminal

and press enter

to view the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me drag this to the capture area

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click APPLY button
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on the '''left''' side of '''object inspector menu''' click '''Apply'''

The '''geometry''' created will be seen in the '''paraview window'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Scroll down the '''Object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Check and uncheck the mesh field box
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Check and uncheck the Mesh field box'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see '''different regions''' of the geometry.

You can also see the''' wire frame '''of the geometry

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For wireframe of the geometry

Change from surface to wireframe
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On top of '''active variable control menu''' in the '''drop down menu'''

Change from '''Surface to wireframe'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''wireframe model''' of the geometry

close this

Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

How to '''create a curved geometry'''.

How to '''enter points for edges in OpenFOAM'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an Assignment

Create a geometry with '''inner semi-circle of radius 2 meters'''

'''and outer circle of radius 4 meters'''

and

View the results in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

About Spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.com

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-05-29T11:45:05Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent flow''' case in '''OpenFOAM'''

* Plotting '''streamlines''' in '''Paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
* '''Linux operating system''' '''Ubuntu 12.04'''

* '''OpenFoam version 2.1.1'''

* '''Paraview version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

* '''Turbulence modelling'''

* Knowledge of how to solve flow in a '''Lid driven cavity'''

* If not so please refer to the revelent '''tutorial''' on our website

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary'''

'''conditions''' to the ''''Lid Driven Cavity'''' problem discussed in the

basic level tutorial.

Please make a note this '''problem''' is already set up in

'''pisoFoam solver''' in OpenFoam directory.

The '''boundary conditions''' are Lid velocity , '''U =1m/s'''

And we are solving this for a '''Reynolds number''' '''Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will be using the '''Transient''' '''solver''' for '''incompressible''',

'''turbulent flow of Newtonian fluids'''.

called as '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''terminal window'''

By pressing '''Ctrl+Atl+t keys''' together.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Go to the pisoFoam folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal window '''type run''' and press enter

Now type '''cd tutorials''' and press enter

type '''cd incompressible''' and press enter

type '''cd pisoFoam''' (Note that F here is capital ) and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

In this you will see two folders '''les and ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cavity folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd ras''' and press enter

Now type''' ls''' and press enter

You can see the '''cavity''' folder. Let me clear this off.

type '''cd cavity''' and press enter

Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see three folders''' 0,constant and system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

ls to view the files inside this folder

Do not edit the files unitil inlet parameters don't change

Refer to the earlier tutorial on channel flow for calculating these values

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To do this, In the command '''terminal''' type

'''cd 0''' and press enter

Now type '''ls''' and press enter

You can see files named as '''epsilon, k, nut, nutilda,p,R and U'''.

These files are to be kept as default until the '''inlet''' parameters don't change.

If any changes are to be done please refer to the tutorial

On '''Simulating flow in a channel''' using OpenFoam

to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Let us view the constant folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ..''' and press enter

Let me clear this off

Let us open the '''constant''' folder.

To do this type '''cd constant''' and press enter

Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing the geometry

of the case inside '''blockMeshDict'''

And the '''fluid properties'''.

In this case you will see two more files

other than '''transportProperties''' named as

'''RASProperties''' and''' turbulenceProperties'''

Let us open these two '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal type''' gedit (space) RASProperties''' and press enter.

Scroll Down

'''RASProperties''' contain the '''Reynolds average stress model''' for this case.

Which is kept as '''kEpsilon'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the command terminal, type

'''gedit (space) turbulentproperties''' and press enter

'''turbulentProperties''' contain the '''turbulent model''' ,

'''Simulation type model''' for this case is kept as '''RASModel'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties''' model

To do this, In the terminal type '''gedit transportProperties '''and press enter.

The '''transportModel '''we are using here is '''Newtonian '''and

Viscosity is kept as '''1 e raise to -4'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the geometry in this case

So we need not go inside the '''polyMesh '''folder

and look at the '''blockMeshDict''' file

It can be kept as it is

In the terminal type '''cd ..''' and press enter

We will keep the '''system''' folder default

As there are no changes inside it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, We are done with the setup

Now we can '''mesh''' the geometry

To do this in the terminal window '''type blockMesh''' and press Enter

'''Meshing '''has been done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can run the '''solver'''

To do this in the terminal type '''pisoFoam''' and press enter

the '''iterations''' running can be seen in the terminal window.

It may take some time for the '''iterations''' to stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''Iterations''' running will stop at the end of the time step.

To visualize the results let us open the '''paraview''' window.

To do this in the terminal '''type paraFoam''' and press enter.

This will open the '''paraview''' window

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''

You can see the '''lid driven cavity''' geometry.

A common visualisation is '''surface plots'''.

Change the display to '''Surface''' in the column and

from the drop down menu change from '''solid color to U'''

You can see the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the paraview window you can see the '''VCR control'''

Click the '''play''' button

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle on''' the '''color legend''' on the left hand side top

of '''paraview''' '''active variable control menu'''.

Click on it, You can see the colour legend

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To visualise the '''stream lines'''

On the top menu bar of '''paraview'''

Go to '''Filters > Common > Stream Tracer'''s

Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top of the
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' click on '''Apply'''.

You can see the '''stream lines''' at the center of the lid driven cavity.

You can also change the '''orientation''' in which the stream lines are viewed.

To do this , scroll down

You can see the''' seed type'''

Let me shift this to the right

and change from''' point source to line source'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X''', '''Y''' and '''Z''' '''axis''' which are visible

select any one of these axis

in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and

'''plot streamlines''' along the '''X axis'''

Now delete this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the velocity along the x and y axis using plot over line

To do this go to '''Filter > Data Analysis > Plot over line'''

Save the data as''' .(dot) csv''' file from file menu

Click on '''save data'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libre office spreadsheet '''or any other '''plotting''' software of your choice

Now let me switch back to the slides

The results obtained can be '''validated''' by results obtained by '''Ghia et.al for Reynolds No , Re= 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Thats all we have in this tutorial

Let us summarise

In this tutorial we learnt '''Turbulent Flow in a Lid Driven Cavity'''

And '''plotting streamlines '''in''' paraView'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

* Modify the '''grid size''' of the cavity

* Change it to (100 100 1)

* Visualise the results in paraview using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

This project is coordinated by http://spoken-tutorial.org

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English

2019-05-29T11:24:54Z

DeepaVedartham:

'''Title of script''': Creating simple geometry in OpenFOAM

'''Author''': Rahul Ashok Joshi

'''Keywords''': Video Tutorial,Computational Fluid Dynamics (CFD),OpenFOAM geometry

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating a simple geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objective
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*How to create a '''simple geometry'''
*How to view geometry in '''paraview '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
*'''Linux Operating system Ubuntu 10.04 '''
*'''OpenFOAM version 2.1.0 '''
*'''ParaView version 3.12.0 '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Only narration

run>> tutorials >> incompressible>> icoFoam >>cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''CFD''' the '''Pre-processing''' part consists of creating geometry and '''meshing''' it.

Let us take the '''Lid driven cavity''' case as an example.

I have already opened the '''command terminal''' and entered

the path for '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5: For OpenFOAM v 5.0

To source the OpenFOAM version 5, type:

'''$of5 '''

To go to the run folder, type:

'''$cd $FOAM_RUN '''

To open the cavity case directory, type:

'''$cd tutorials/incompressible/icoFoam/cavity/cavity '''

To list the contents of case directory, type:

'''$ls '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the command terminal

constant>>polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There are three folders '''0,constant''',and '''system'''

'''Geometry''' is inside the '''polymesh''' folder of '''constant'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window: type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type '''cd constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

In this there is another folder called as''' polymesh'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd polymesh''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.
|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: For OpenFOAM v 5.0

To list the contents of the '''cavity''' directory, type:

'''$ls'''
'''0 constant system'''

To open the system directory, type:

'''$cd system'''

To list the contents of the system directory, type:

'''$ls'''
'''blockMeshDict controlDict fvSchemes fvSolution'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the blockMeshDict file.

Type gedit blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''geometry''' file called as '''blockMeshDict'''.

Open the '''blockMeshDict''' file with any '''editor''' of your choice.

In the '''terminal''' type '''gedit blockMeshDict'''.

Note that '''M''' and '''D''' here are capital and press '''Enter'''.

Let me drag this to the '''capture area'''.

Now minimise this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover over the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''OpenFoam''' the entire geometry is broken into '''blocks.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Block vertex starts from 0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''blocks''' are numbered starting from''' 0 '''as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For 2D geometry enter a unit thickness cell in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that in '''OpenFOAM''' for creating a '''2D geometry''', you need to give '''cell thickness value''' in the '''z-axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Dimension of Cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is of '''length 1 and height 1'''.

Minimise the slide.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create empty file

right click >create document>empty file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On your '''desktop''' create an '''empty file''' by

'''right click > create document > Empty file '''

Name this as '''blockMeshDict.'''

(Note that M and D here are capital)

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy data from old blockMeshDict file

upto convertToMeters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|Open this.

Now copy the data from the original '''lid driven cavity blockMeshDict''' file to the new '''blockMeshDict''' file from '''line 0'''.

Scroll up. '''line 0''' upto '''convertTometers'''.

Copy this and paste it here.

Scroll down.

Now leave some space after '''convertTometers'''.

Enter '''1''' as the geometry is in meters.

Insert a semi-colon and press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file

type vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the file type '''vertices''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert the '''open bracket''' and press '''Enter'''.

Press the '''Tab''' key.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Start with point 0

(0 0 0) and move to positive x axis

enter (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Start with point '''0'''.

Insert open close brackets.

Enter

'''(0 space 0 space 0) '''and press '''Enter'''.

Again press '''Tab''' key.

Open close bracket.

Move towards point 1 in positive '''x-axis''' and enter '''(1 space 0 space 0)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 2 in the x-y plane
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Move towards point 2 in the '''positive x-y plane''' and enter '''(1 space 1 space 0)'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 3 in y direction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Enter the 3rd point in '''positive y axis (0 space 1 space 0 )'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 in the front face

enter (1 0 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key.

Enter the 4th point on the '''front face.

Open close bracket. (0 space 0 space 0.1)'''

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points 5,6,7 with unit cell thickness in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter the other '''points''' with one unit value in the '''positive z -axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the''' bracket''' and insert a '''semicolon''' after it.

Press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blocks and insert (

Lid driven cavity is a single block
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below vertices are the '''blocks'''.

Type '''blocks''' and press '''Enter'''.

Insert an open bracket and press '''Enter'''.

Let me switch back to the slides.

Note that Lid driven cavity is taken as a '''single block '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the vertices of block

block (0 1 2 3 4 5 6 7 ) total 8 points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to '''blockMeshDict'''.

Enter the points for the blocks in the clockwise sense.

We are using here hexahedral blocks for meshing.

Now type hex '''H E X''', leave some space, in brackets enter '''(0 space 1 space 2 space 3 space 4 space 5 space 6 space 7)'''. Again leave some space.

Note that for '''multiple blocks''' the points will be more.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter grid points in x, y and z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this enter the '''grid points''' in the x,y,and z directions

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the mesh/grid size

enter ( 30 30 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''brackets''' enter '''(30 space 30 space 1)''', leave some space. You can '''modify''' the '''grid''' as when needed.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Grid point in z axis is kept as 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Grid point in z-axis''' can be taken as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter simpleGrading value ( 1 1 1 )

insert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now leave some space and type '''simple grading''' leave some space and enter '''(1 space 1 space 1)'''.
This is the grid spacing in the x,y and z direction.

Press enter, insert a '''close bracket''' and insert the '''semicolon''' and press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''edges''' and press enter,as this is a simple geometry edges can be kept empty.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert ( );
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert '''open bracket''' press enter, close a bracket insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below '''edges''' are the '''boundary conditions'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''boundary name''' for the '''faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type boundary

insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''boundary''' and press enter

insert a''' open bracket''' and press enter

Let me switch back to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the geometry the '''upper wall is moving''' and other '''three walls are fixed'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Front and back faces are named as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''front and back faces''' are termed as '''empty''' as this is a 2D problem

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open the '''New blockMeshDict''' file again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patch as moving wall
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary''' put the name of the '''patch''' as '''moving wall''' press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert {
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open curly bracket''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type of moving wall : wall

insert ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''type''' for the '''moving wall'''. Enter '''type space wall'''

insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type faces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now faces, now press enter, insert '''open bracket''', press enter, press a '''tab''' key, '''open close''' bracket and in this bracket type '''faces'''
Enter open and close brackets
In brackets enter the points for faces

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that order the points in such a way that the '''thumb''' should be '''normal''' to that '''face '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Clockwise curl of fingers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| And '''fingers''' make a '''curl''' as shown in the figure. The '''curl''' can be '''clockwise''' or '''anticlockwise'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points should be entered matching the points inserted in vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also note that the '''points''' should match with the '''points inserted in vertices'''. Now let me switch back to new '''blockMeshDict''' file.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter (3 7 6 2)

insert } and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the '''face point'''s as '''(3 space 7 space 6 space 2)'''. Let me switch back to the slide. These are the points for the moving wall '''(3 7 6 2)'''. Minimize this. Note that you can start from any point on that face.
Now press enter. Close the bracket. You need to enter the '''semicolon'''.
After you insert the points for the faces again press enter. Close the '''curly''' bracket. Another note now after the curly brackets press enter again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patches for fixedWalls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter '''boundary condition''' and '''faces''' for the '''fixed wall '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For front and back face enter type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Being a 2D problem the '''type of boundary'''

for '''front and back face''' can be kept as '''empty'''.
Refer to figure in this slide for entering the points.
Insert the '''closed brackets''' and put a '''semicolon'''. Again press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert mergePatchPairs
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''mergePatchPairs''' and press enter. Since there are no patches to be merged, it can be kept empty. Insert the '''Open-closed brackets''' and insert a '''semicolon'''. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| BlockMeshDict file is completed

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with creating the '''blockMeshDict''' file.

The complete''' blockMeshDict '''file is as shown here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the original blockMeshDict file

The command terminal will not work till blockMeshDict is closed
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''original blockMeshDict''' file

Note that '''command terminal''' will not work until '''blockMeshDict file''' is '''closed'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''cd (dot) (dot)''' twice to return to the '''cavity''' folder '''Mesh the geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing, type blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in '''terminal''' type: '''blockMesh''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Viewing the geometry type paraFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| View the '''geometry''' by typing in the '''command terminal''' '''paraFoam''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click Apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side click '''Apply''' on '''object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

Creating a simple geometry in '''OpenFOAM'''

Viewed the '''geometry''' in '''Paraview '''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment

Change the geometry parameters : Enter the '''grid point'''s as '''(40 40 1) and (50 50 1)'''.

View the geometry in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : About spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL: [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial.org/What_is_a_Spoken_Tutorial]

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : about spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at contact@spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English

2019-05-29T11:16:03Z

DeepaVedartham:

'''Title of script''': Creating simple geometry in OpenFOAM

'''Author''': Rahul Ashok Joshi

'''Keywords''': Video Tutorial,Computational Fluid Dynamics (CFD),OpenFOAM geometry

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating a simple geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objective
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*How to create a '''simple geometry'''
*How to view geometry in '''paraview '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
*'''Linux Operating system Ubuntu 10.04 '''
*'''OpenFOAM version 2.1.0 '''
*'''ParaView version 3.12.0 '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Only narration

run>> tutorials >> incompressible>> icoFoam >>cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''CFD''' the '''Pre-processing''' part consists of creating geometry and '''meshing''' it.

Let us take the '''Lid driven cavity''' case as an example.

I have already opened the '''command terminal''' and entered

the path for '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5: For OpenFOAM v 5.0

To source the OpenFOAM version 5, type:

'''$of5 '''

To go to the run folder, type:

'''$cd $FOAM_RUN '''

To open the cavity case directory, type:

'''$cd tutorials/incompressible/icoFoam/cavity/cavity '''

To list the contents of case directory, type:

'''$ls '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the command terminal

constant>>polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There are three folders '''0,constant''',and '''system'''

'''Geometry''' is inside the '''polymesh''' folder of '''constant'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window: type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type '''cd constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

In this there is another folder called as''' polymesh'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd polymesh''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.
|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: For OpenFOAM v 5.0

To list the contents of the '''cavity''' directory, type:

'''$ls'''
'''0 constant system'''

To open the system directory, type:

'''$cd system'''

To list the contents of the system directory, type:

'''$ls'''
'''blockMeshDict controlDict fvSchemes fvSolution'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the blockMeshDict file.

Type gedit blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''geometry''' file called as '''blockMeshDict'''.

Open the '''blockMeshDict''' file with any '''editor''' of your choice.

In the '''terminal''' type '''gedit blockMeshDict'''.

Note that '''M''' and '''D''' here are capital and press '''Enter'''.

Let me drag this to the '''capture area'''.

Now minimise this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover over the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''OpenFoam''' the entire geometry is broken into '''blocks.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Block vertex starts from 0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''blocks''' are numbered starting from''' 0 '''as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For 2D geometry enter a unit thickness cell in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that in '''OpenFOAM''' for creating a '''2D geometry''', you need to give '''cell thickness value''' in the '''z-axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Dimension of Cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is of '''length 1 and height 1'''.

Minimise the slide.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create empty file

right click >create document>empty file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On your '''desktop''' create an '''empty file''' by

'''right click > create document > Empty file '''

Name this as '''blockMeshDict.'''

(Note that M and D here are capital)

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy data from old blockMeshDict file

upto convertToMeters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|Open this.

Now copy the data from the original '''lid driven cavity blockMeshDict''' file to the new '''blockMeshDict''' file from '''line 0'''.

Scroll up. '''line 0''' upto '''convertTometers'''.

Copy this and paste it here.

Scroll down.

Now leave some space after '''convertTometers'''.

Enter '''1''' as the geometry is in meters.

Insert a semi-colon and press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file

type vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the file type '''vertices''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert the '''open bracket''' and press '''Enter'''.

Press the '''Tab''' key.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Start with point 0

(0 0 0) and move to positive x axis

enter (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Start with point '''0'''.

Insert open close brackets.

Enter

'''(0 space 0 space 0) '''and press '''Enter'''.

Again press '''Tab''' key.

Open close bracket.

Move towards point 1 in positive '''x-axis''' and enter '''(1 space 0 space 0)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 2 in the x-y plane
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Move towards point 2 in the '''positive x-y plane''' and enter '''(1 space 1 space 0)'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 3 in y direction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Enter the 3rd point in '''positive y axis (0 space 1 space 0 )'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 in the front face

enter (1 0 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key.

Enter the 4th point on the '''front face.

Open close bracket. (0 space 0 space 0.1)'''

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points 5,6,7 with unit cell thickness in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter the other '''points''' with one unit value in the '''positive z -axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the''' bracket''' and insert a '''semicolon''' after it.

Press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blocks and insert (

Lid driven cavity is a single block
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below vertices are the '''blocks'''.

Type '''blocks''' and press '''Enter'''.

Insert an open bracket and press '''Enter'''.

Let me switch back to the slides.

Note that Lid driven cavity is taken as a '''single block '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the vertices of block

block (0 1 2 3 4 5 6 7 ) total 8 points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to '''blockMeshDict'''.

Enter the points for the blocks in the clockwise sense.

We are using here hexahedral blocks for meshing.

Now type hex '''H E X''', leave some space, in brackets enter '''(0 space 1 space 2 space 3 space 4 space 5 space 6 space 7)'''. Again leave some space.

Note that for '''multiple blocks''' the points will be more.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter grid points in x, y and z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this enter the '''grid points''' in the x,y,and z directions

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the mesh/grid size

enter ( 30 30 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''brackets''' enter '''(30 space 30 space 1)''', leave some space. You can '''modify''' the '''grid''' as when needed.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Grid point in z axis is kept as 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Grid point in z-axis''' can be taken as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter simpleGrading value ( 1 1 1 )

insert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now leave some space and type '''simple grading''' leave some space and enter '''(1 space 1 space 1)'''.
This is the grid spacing in the x,y and z direction.

Press enter, insert a '''close bracket''' and insert the '''semicolon''' and press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''edges''' and press enter,as this is a simple geometry edges can be kept empty.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert ( );
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert '''open bracket''' press enter, close a bracket insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below '''edges''' are the '''boundary conditions'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''boundary name''' for the '''faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type boundary

insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''boundary''' and press enter

insert a''' open bracket''' and press enter

Let me switch back to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the geometry the '''upper wall is moving''' and other '''three walls are fixed'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Front and back faces are named as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''front and back faces''' are termed as '''empty''' as this is a 2D problem

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open the '''New blockMeshDict''' file again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patch as moving wall
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary''' put the name of the '''patch''' as '''moving wall''' press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert {
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open curly bracket''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type of moving wall : wall

insert ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''type''' for the '''moving wall'''. Enter '''type space wall'''

insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type faces
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now faces, now press enter, insert '''open bracket''', press enter, press a '''tab''' key, '''open close''' bracket and in this bracket type '''faces'''
Enter open and close brackets
In brackets enter the points for faces

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that order the points in such a way that the '''thumb''' should be '''normal''' to that '''face '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Clockwise curl of fingers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| And '''fingers''' make a '''curl''' as shown in the figure. The '''curl''' can be '''clockwise''' or '''anticlockwise'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points should be entered matching the points inserted in vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also note that the '''points''' should match with the '''points inserted in vertices'''. Now let me switch back to new '''blockMeshDict''' file.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter (3 7 6 2)

insert } and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the '''face point'''s as '''(3 space 7 space 6 space 2)'''. Let me switch back to the slide. These are the points for the moving wall '''(3 7 6 2)'''. Minimize this. Note that you can start from any point on that face.
Now press enter. Close the bracket. You need to enter the '''semicolon'''.
After you insert the points for the faces again press enter. Close the '''curly''' bracket. Another note now after the curly brackets press enter again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patches for fixedWalls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter '''boundary condition''' and '''faces''' for the '''fixed wall '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For front and back face enter type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Being a 2D problem the '''type of boundary'''

for '''front and back face''' can be kept as '''empty'''.
Refer to figure in this slide for entering the points.
Insert the '''closed brackets''' and put a '''semicolon'''. Again press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''mergePatchPairs''' and press enter. Since there are no patches to be merged, it can be kept empty. Insert the '''Open-closed brackets''' and insert a '''semicolon'''. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| BlockMeshDict file is completed

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with creating the '''blockMeshDict''' file.

The complete''' blockMeshDict '''file is as shown here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the original blockMeshDict file

The command terminal will not work till blockMeshDict is closed
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''original blockMeshDict''' file

Note that '''command terminal''' will not work until '''blockMeshDict file''' is '''closed'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''cd (dot) (dot)''' twice to return to the '''cavity''' folder '''Mesh the geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing, type blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in '''terminal''' type: '''blockMesh''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Viewing the geometry type paraFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| View the '''geometry''' by typing in the '''command terminal''' '''paraFoam''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click Apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side click '''Apply''' on '''object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

Creating a simple geometry in '''OpenFOAM'''

Viewed the '''geometry''' in '''Paraview '''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment

Change the geometry parameters : Enter the '''grid point'''s as '''(40 40 1) and (50 50 1)'''.

View the geometry in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : About spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL: [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial.org/What_is_a_Spoken_Tutorial]

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : about spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at contact@spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-05-29T11:15:35Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

* Solving '''turbulent flow''' case in '''OpenFOAM'''

* Plotting '''streamlines''' in '''Paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using '''Linux operating system''' '''Ubuntu 12.04'''

'''OpenFoam version 2.1.1'''

'''Paraview version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

'''Turbulence modelling'''

Knowledge of how to solve flow in a '''Lid driven cavity'''

If not so please refer to the revelent '''tutorial''' on our website

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary'''

'''conditions''' to the ''''Lid Driven Cavity'''' problem discussed in the

basic level tutorial.

Please make a note this '''problem''' is already set up in

'''pisoFoam solver''' in OpenFoam directory.

The '''boundary conditions''' are Lid velocity , '''U =1m/s'''

And we are solving this for a '''Reynolds number''' '''Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will be using the '''Transient''' '''solver''' for '''incompressible''',

'''turbulent flow of Newtonian fluids'''.

It is called '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me open the '''terminal window'''

To do this press '''Ctrl+Atl+t keys''' simultaneously on your '''keyboard'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Go to the pisoFoam folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal window '''type run''' and press enter

Now type '''cd tutorials''' and press enter

type '''cd incompressible''' and press enter

type '''cd pisoFoam''' (Note that F here is capital ) and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

In this you will see two folders '''les and ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cavity folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd ras''' and press enter

Now type''' ls''' and press enter

You can see the '''cavity''' folder

type '''cd cavity''' and press enter

Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see three folders''' 0,constant and system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

ls to view the files inside this folder

Do not edit the files unitil inlet parameters don't change

Refer to the earlier tutorial on channel flow for calculating these values

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type the following command

'''cd 0''' and press enter

Now type '''ls''' and press enter

You can see files named as '''epsilon, k, nut, nutilda,p,R and U'''.

These files are to be kept as default until the '''inlet''' parameters don't change.

If any changes are to be done please refer to the tutorial

On '''Simulating flow in a channel''' using OpenFoam

to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Let us view the constant folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ..''' and press enter

Let me clear this off

Let us open the '''constant''' folder.

To do this type '''cd constant''' and press enter

Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing the geometry

of the case inside '''blockMeshDict'''

And the '''fluid properties'''.

In this case you will see two more files

other than '''transportProperties''' named as

'''RASProperties''' and''' turbulenceProperties'''

Let us open these two '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal type''' gedit (space) RASProperties''' and press enter.

Let me drag this to the capture area

Scroll Down

'''RASProperties''' contain the '''Reynolds average stress model''' for this case.

Which is kept as '''kepsilon'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the command terminal now type

'''gedit (space) turbulentproperties''' and press enter

'''turbulentProperties''' contain the '''turbulent model''' ,

'''Simulation type model''' for this case is kept as '''RASModel'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties''' file

In the terminal window type '''transportProperties '''and press enter.

The '''transportModel '''we are using here is '''Newtonian '''and

Viscosity is kept as '''1 e raise to -4'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do ot change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the geometry in this case

So we need not go inside the '''polyMesh '''folder

and look at the '''blockMeshDict''' file

It can be kept as it is

In the terminal type '''cd ..''' and press enter

We will keep the '''system''' folder default

As there are no changes inside it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with the setup

Now we can '''mesh''' the geometry

To do this in the teminal window '''type blockMesh''' and press Enter

'''Meshing '''has been done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can run the '''solver'''

To do this in the terminal type '''pisoFoam''' and press enter

the '''iterations''' running can be seen in the terminal window.

It may take some time till the '''iterations''' stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations''' will stop at the end of the time step.

To visualize the results let us open the '''paraview''' window.

To do this in the terminal '''type paraFoam''' and press enter.

This will open the '''paraview''' window

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''

You can see the '''lid driven cavity''' geometry.

A common visualisation is '''surface plots'''.

Change the display to '''Surface''' in the column and

from the drop down menu change from '''solid color to U'''

You can see the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the paraview window you can see the '''VCR control'''

Click the '''play''' button

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle on''' the '''color legend''' on the left hand side top

of '''paraview''' '''active variable control menu'''.

Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To visualise the '''stream lines'''

On the top menu bar of '''paraview'''

Go to '''Filters > Common > Stream Tracer'''s

Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top of the
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' click on '''Apply'''.

You can see the '''stream lines''' at the center of the lid driven cavity.

You can also change the '''orientation''' in which the stream lines are viewed.

To do this , scroll down

You can see the''' seed type'''

Let me shift this to the right

and change the seed type from''' point source to line source'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X''', '''Y''' and '''Z''' '''axis''' which are visible

select any one of these axis

in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and

'''plot streamlines''' along the '''X axis'''

Now delete this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the velocity along the x and y axis using plot over line

To do this go to '''Filter > Data Analysis > Plot over line'''

Save the data as''' .(dot) csv''' file from file menu

Click on '''save data'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libreoffice spreadsheet '''or any other '''plotting''' software of your choice

Now let me switch back to the slides

The results obtained can be '''validated''' by results obtained by '''Ghia et.al for Reynolds No , Re= 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Thats all we have in this tutorial

Let us summarise

In this tutorial we learnt '''Turbulent Flow in a Lid Driven Cavity'''

And '''plotting streamlines '''in''' paraView'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

Modify the '''grid size''' of the cavity

Change it to (100 100 1)

Visualise the results in paraview using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

This project is coordinated by http://spoken-tutorial.org

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English

2019-05-29T11:13:38Z

DeepaVedartham:

Tutorial: Turbulent flow in a lid driven cavity

Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi

Narration : Rahul Joshi

Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

Solving '''turbulent flow''' case in '''OpenFOAM'''

Plotting '''streamlines''' in '''Paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using '''Linux operating system''' '''Ubuntu 12.04'''

'''OpenFoam version 2.1.1'''

'''Paraview version 3.12.0'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4:

System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 :

Prerequisites
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial you should have some basic knowledge of

'''Turbulence modelling'''

Knowledge of how to solve flow in a '''Lid driven cavity'''

If not so please refer to the revelent '''tutorial''' on our website

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Demo:

Set up working Directory

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This problem is identical in '''geometry and boundary'''

'''conditions''' to the ''''Lid Driven Cavity'''' problem discussed in the

basic level tutorial.

Please make a note this '''problem''' is already set up in

'''pisoFoam solver''' in OpenFoam directory.

The '''boundary conditions''' are Lid velocity , '''U =1m/s'''

And we are solving this for a '''Reynolds number''' '''Re =10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We will be using the '''Transient''' '''solver''' for '''incompressible''',

'''turbulent flow of Newtonian fluids'''.

It is called '''pisoFoam'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let me open the '''terminal window'''

To do this press '''Ctrl+Atl+t keys''' simultaneously on your '''keyboard'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window

Go to the pisoFoam folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal window '''type run''' and press enter

Now type '''cd tutorials''' and press enter

type '''cd incompressible''' and press enter

type '''cd pisoFoam''' (Note that F here is capital ) and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Two Folders les and ras

Cavity folder inside RAS
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type''' ls''' and press enter

In this you will see two folders '''les and ras'''

Our problem is setup inside '''ras''' folder which is called as '''reynolds averaged stress'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Cavity folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Our folder name is '''cavity'''.

Now type '''cd ras''' and press enter

Now type''' ls''' and press enter

You can see the '''cavity''' folder

type '''cd cavity''' and press enter

Now type''' ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary and Initial conditions

0 folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see three folders''' 0,constant and system'''.

The '''initial conditions''' are specified within the files in the ''''0'''' directory.

Let us take a look at the files in the ''''0'''' directory.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inside the 0 folder

ls to view the files inside this folder

Do not edit the files unitil inlet parameters don't change

Refer to the earlier tutorial on channel flow for calculating these values

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type the following command

'''cd 0''' and press enter

Now type '''ls''' and press enter

You can see files named as '''epsilon, k, nut, nutilda,p,R and U'''.

These files are to be kept as default until the '''inlet''' parameters don't change.

If any changes are to be done please refer to the tutorial

On '''Simulating flow in a channel''' using OpenFoam

to calculate these values.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Let us view the constant folder
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''cd ..''' and press enter

Let me clear this off

Let us open the '''constant''' folder.

To do this type '''cd constant''' and press enter

Now type '''ls''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this you will see the '''polyMesh''' folder containing the geometry

of the case inside '''blockMeshDict'''

And the '''fluid properties'''.

In this case you will see two more files

other than '''transportProperties''' named as

'''RASProperties''' and''' turbulenceProperties'''

Let us open these two '''files'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the terminal type''' gedit (space) RASProperties''' and press enter.

Let me drag this to the capture area

Scroll Down

'''RASProperties''' contain the '''Reynolds average stress model''' for this case.

Which is kept as '''kepsilon'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now in the command terminal now type

'''gedit (space) turbulentproperties''' and press enter

'''turbulentProperties''' contain the '''turbulent model''' ,

'''Simulation type model''' for this case is kept as '''RASModel'''

Close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| TransportModel

Change the value of viscosity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now let us open the '''transportProperties''' file

In the terminal window type '''transportProperties '''and press enter.

The '''transportModel '''we are using here is '''Newtonian '''and

Viscosity is kept as '''1 e raise to -4'''

close this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do ot change the blockMeshDict file

The system folder is to be kept default
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are not changing the geometry in this case

So we need not go inside the '''polyMesh '''folder

and look at the '''blockMeshDict''' file

It can be kept as it is

In the terminal type '''cd ..''' and press enter

We will keep the '''system''' folder default

As there are no changes inside it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing the geometry

blockMesh

Meshing is done
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with the setup

Now we can '''mesh''' the geometry

To do this in the teminal window '''type blockMesh''' and press Enter

'''Meshing '''has been done

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now we can run the '''solver'''

To do this in the terminal type '''pisoFoam''' and press enter

the '''iterations''' running can be seen in the terminal window.

It may take some time till the '''iterations''' stop.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Iterations''' will stop at the end of the time step.

To visualize the results let us open the '''paraview''' window.

To do this in the terminal '''type paraFoam''' and press enter.

This will open the '''paraview''' window

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| View the geometry

Lid driven cavity geometry

Change the drop down menu from solid color to U
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side in the '''Object Inspector menu''' click on '''Apply'''

You can see the '''lid driven cavity''' geometry.

A common visualisation is '''surface plots'''.

Change the display to '''Surface''' in the column and

from the drop down menu change from '''solid color to U'''

You can see the initial condition of velocity

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the Play button on VCR control for animation

Toggle on the color legend
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now on top of the paraview window you can see the '''VCR control'''

Click the '''play''' button

You can see the motion of the fluid inside the '''cavity'''.

You can also '''toggle on''' the '''color legend''' on the left hand side top

of '''paraview''' '''active variable control menu'''.

Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Visualise the streamlines

Filters > Common > Stream Tracers

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To visualise the '''stream lines'''

On the top menu bar of '''paraview'''

Go to '''Filters > Common > Stream Tracer'''s

Click on it

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top of the
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side of the '''Object inspector menu''' click on '''Apply'''.

You can see the '''stream lines''' at the center of the lid driven cavity.

You can also change the '''orientation''' in which the stream lines are viewed.

To do this , scroll down

You can see the''' seed type'''

Let me shift this to the right

and change the seed type from''' point source to line source'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot streamlines about X, Y and Z axis

Click on the Y axis

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see the '''X''', '''Y''' and '''Z''' '''axis''' which are visible

select any one of these axis

in which you would like to view the '''stream lines'''.

I will select the '''Y axis''' and click '''Apply'''

You can see the '''streamlines''' along the Y axis.

Similarly you can select the '''X axis''' and

'''plot streamlines''' along the '''X axis'''

Now delete this

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot data over line

Save as .csv format
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can also plot the velocity along the x and y axis using plot over line

To do this go to '''Filter > Data Analysis > Plot over line'''

Save the data as''' .(dot) csv''' file from file menu

Click on '''save data'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Plot the results

Validate the results with Ghia et.al.

For Re= 10000
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can plot this data in '''libreoffice spreadsheet '''or any other '''plotting''' software of your choice

Now let me switch back to the slides

The results obtained can be '''validated''' by results obtained by '''Ghia et.al for Reynolds No , Re= 10000'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7:

Summary
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Thats all we have in this tutorial

Let us summarise

In this tutorial we learnt '''Turbulent Flow in a Lid Driven Cavity'''

And '''plotting streamlines '''in''' paraView'''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment

Modify the '''grid size''' of the cavity

Change it to (100 100 1)

Visualise the results in paraview using '''streamlines'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at

contact@spoken-tutorial.org

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:

Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10:

Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11:

Lab Migration Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12:

Case Study Project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

This project is coordinated by http://spoken-tutorial.org

More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The script is contributed by Shekhar Mishra and Chaitanya talnikar

This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining

|}

OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English

2019-05-29T10:59:57Z

DeepaVedartham:

'''Title of script''': Creating simple geometry in OpenFOAM

'''Author''': Rahul Ashok Joshi

'''Keywords''': Video Tutorial,Computational Fluid Dynamics (CFD),OpenFOAM geometry

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating a simple geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objective
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*How to create a '''simple geometry'''
*How to view geometry in '''paraview '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
*'''Linux Operating system Ubuntu 10.04 '''
*'''OpenFOAM version 2.1.0 '''
*'''ParaView version 3.12.0 '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Only narration

run>> tutorials >> incompressible>> icoFoam >>cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''CFD''' the '''Pre-processing''' part consists of creating geometry and '''meshing''' it.

Let us take the '''Lid driven cavity''' case as an example.

I have already opened the '''command terminal''' and entered

the path for '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5: For OpenFOAM v 5.0

To source the OpenFOAM version 5, type:

'''$of5 '''

To go to the run folder, type:

'''$cd $FOAM_RUN '''

To open the cavity case directory, type:

'''$cd tutorials/incompressible/icoFoam/cavity/cavity '''

To list the contents of case directory, type:

'''$ls '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the command terminal

constant>>polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There are three folders '''0,constant''',and '''system'''

'''Geometry''' is inside the '''polymesh''' folder of '''constant'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window: type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type '''cd constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

In this there is another folder called as''' polymesh'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd polymesh''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.
|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: For OpenFOAM v 5.0

To list the contents of the '''cavity''' directory, type:

'''$ls'''
'''0 constant system'''

To open the system directory, type:

'''$cd system'''

To list the contents of the system directory, type:

'''$ls'''
'''blockMeshDict controlDict fvSchemes fvSolution'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the blockMeshDict file.

Type gedit blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''geometry''' file called as '''blockMeshDict'''.

Open the '''blockMeshDict''' file with any '''editor''' of your choice.

In the '''terminal''' type '''gedit blockMeshDict'''.

Note that '''M''' and '''D''' here are capital and press '''Enter'''.

Let me drag this to the '''capture area'''.

Now minimise this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover over the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''OpenFoam''' the entire geometry is broken into '''blocks.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Block vertex starts from 0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''blocks''' are numbered starting from''' 0 '''as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For 2D geometry enter a unit thickness cell in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that in '''OpenFOAM''' for creating a '''2D geometry''', you need to give '''cell thickness value''' in the '''z-axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Dimension of Cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is of '''length 1 and height 1'''.

Minimise the slide.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create empty file

right click >create document>empty file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On your '''desktop''' create an '''empty file''' by

'''right click > create document > Empty file '''

Name this as '''blockMeshDict.'''

(Note that M and D here are capital)

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy data from old blockMeshDict file

upto convertToMeters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|Open this.

Now copy the data from the original '''lid driven cavity blockMeshDict''' file to the new '''blockMeshDict''' file from '''line 0'''.

Scroll up. '''line 0''' upto '''convertTometers'''.

Copy this and paste it here.

Scroll down.

Now leave some space after '''convertTometers'''.

Enter '''1''' as the geometry is in meters.

Insert a semi-colon and press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file

type vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the file type '''vertices''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert the '''open bracket''' and press '''Enter'''.

Press the '''Tab''' key.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Start with point 0

(0 0 0) and move to positive x axis

enter (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Start with point '''0'''.

Insert open close brackets.

Enter

'''(0 space 0 space 0) '''and press '''Enter'''.

Again press '''Tab''' key.

Open close bracket.

Move towards point 1 in positive '''x-axis''' and enter '''(1 space 0 space 0)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 2 in the x-y plane
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Move towards point 2 in the '''positive x-y plane''' and enter '''(1 space 1 space 0)'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 3 in y direction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Enter the 3rd point in '''positive y axis (0 space 1 space 0 )'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 in the front face

enter (1 0 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key.

Enter the 4th point on the '''front face.

Open close bracket. (0 space 0 space 0.1)'''

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points 5,6,7 with unit cell thickness in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter the other '''points''' with one unit value in the '''positive z -axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the''' bracket''' and insert a '''semicolon''' after it.

Press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blocks and insert (

Lid driven cavity is a single block
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below vertices are the '''blocks'''.

Type '''blocks''' and press '''Enter'''.

Insert an open bracket and press '''Enter'''.

Let me switch back to the slides.

Note that Lid driven cavity is taken as a '''single block '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the vertices of block

block (0 1 2 3 4 5 6 7 ) total 8 points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to '''blockMeshDict'''.

Enter the points for the blocks in the clockwise sense.

We are using here hexahedral blocks for meshing.

Now type hex '''H E X''', leave some space, in brackets enter '''(0 space 1 space 2 space 3 space 4 space 5 space 6 space 7)'''. Again leave some space.

Note that for '''multiple blocks''' the points will be more.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter grid points in x, y and z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this enter the '''grid points''' in the x,y,and z directions

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the mesh/grid size

enter ( 30 30 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''brackets''' enter '''(30 space 30 space 1)''', leave some space. You can '''modify''' the '''grid''' as when needed.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Grid point in z axis is kept as 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Grid point in z-axis''' can be taken as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter simpleGrading value ( 1 1 1 )

insert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now leave some space and type '''simple grading''' leave some space and enter '''(1 space 1 space 1)'''.
This is the grid spacing in the x,y and z direction.

Press enter, insert a '''close bracket''' and insert the '''semicolon''' and press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''edges''' and press enter,as this is a simple geometry edges can be kept empty.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert ( );
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert '''open bracket''' press enter, close a bracket insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below '''edges''' are the '''boundary conditions'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''boundary name''' for the '''faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type boundary

insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''boundary''' and press enter

insert a''' open bracket''' and press enter

Let me switch back to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the geometry the '''upper wall is moving''' and other '''three walls are fixed'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Front and back faces are named as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''front and back faces''' are termed as '''empty''' as this is a 2D problem

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open the '''New blockMeshDict''' file again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patch as moving wall
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary''' put the name of the '''patch''' as '''moving wall''' press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert {
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open curly bracket''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type of moving wall : wall

insert ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''type''' for the '''moving wall'''. Enter '''type space wall'''

insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now faces, now press enter, insert '''open bracket''', press enter, press a '''tab''' key, '''open close''' bracket and in this bracket type '''faces'''
Enter open and close brackets
In brackets enter the points for faces

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that order the points in such a way that the '''thumb''' should be '''normal''' to that '''face '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Clockwise curl of fingers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| And '''fingers''' make a '''curl''' as shown in the figure. The '''curl''' can be '''clockwise''' or '''anticlockwise'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points should be entered matching the points inserted in vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also note that the '''points''' should match with the '''points inserted in vertices'''. Now let me switch back to new '''blockMeshDict''' file.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter (3 7 6 2)

insert } and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the '''face point'''s as '''(3 space 7 space 6 space 2)'''. Let me switch back to the slide. These are the points for the moving wall '''(3 7 6 2)'''. Minimize this. Note that you can start from any point on that face.
Now press enter. Close the bracket. You need to enter the '''semicolon'''.
After you insert the points for the faces again press enter. Close the '''curly''' bracket. Another note now after the curly brackets press enter again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patches for fixedWalls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter '''boundary condition''' and '''faces''' for the '''fixed wall '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For front and back face enter type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Being a 2D problem the '''type of boundary'''

for '''front and back face''' can be kept as '''empty'''.
Refer to figure in this slide for entering the points.
Insert the '''closed brackets''' and put a '''semicolon'''. Again press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''mergePatchPairs''' and press enter. Since there are no patches to be merged, it can be kept empty. Insert the '''Open-closed brackets''' and insert a '''semicolon'''. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| BlockMeshDict file is completed

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with creating the '''blockMeshDict''' file.

The complete''' blockMeshDict '''file is as shown here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the original blockMeshDict file

The command terminal will not work till blockMeshDict is closed
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''original blockMeshDict''' file

Note that '''command terminal''' will not work until '''blockMeshDict file''' is '''closed'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''cd (dot) (dot)''' twice to return to the '''cavity''' folder '''Mesh the geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing, type blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in '''terminal''' type: '''blockMesh''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Viewing the geometry type paraFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| View the '''geometry''' by typing in the '''command terminal''' '''paraFoam''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click Apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side click '''Apply''' on '''object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

Creating a simple geometry in '''OpenFOAM'''

Viewed the '''geometry''' in '''Paraview '''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment

Change the geometry parameters : Enter the '''grid point'''s as '''(40 40 1) and (50 50 1)'''.

View the geometry in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : About spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL: [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial.org/What_is_a_Spoken_Tutorial]

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : about spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at contact@spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English

2019-05-29T10:53:25Z

DeepaVedartham:

'''Title of script''': Creating simple geometry in OpenFOAM

'''Author''': Rahul Ashok Joshi

'''Keywords''': Video Tutorial,Computational Fluid Dynamics (CFD),OpenFOAM geometry

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on '''creating a simple geometry in OpenFOAM'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2: Learning Objective
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial I will show you

*How to create a '''simple geometry'''
*How to view geometry in '''paraview '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial I am using
*'''Linux Operating system Ubuntu 10.04 '''
*'''OpenFOAM version 2.1.0 '''
*'''ParaView version 3.12.0 '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide.

Subsequently the tutorials were edited to latest versions.

To install latest system requirements go to Installation Sheet.
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Only narration

run>> tutorials >> incompressible>> icoFoam >>cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''CFD''' the '''Pre-processing''' part consists of creating geometry and '''meshing''' it.

Let us take the '''Lid driven cavity''' case as an example.

I have already opened the '''command terminal''' and entered

the path for '''lid driven cavity'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5: For OpenFOAM v 5.0

To source the OpenFOAM version 5, type:

'''$of5 '''

To go to the run folder, type:

'''$cd $FOAM_RUN '''

To open the cavity case directory, type:

'''$cd tutorials/incompressible/icoFoam/cavity/cavity '''

To list the contents of case directory, type:

'''$ls '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the command terminal

constant>>polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There are three folders '''0,constant''',and '''system'''

'''Geometry''' is inside the '''polymesh''' folder of '''constant'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Terminal window: type cd constant
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the '''command terminal''' type '''cd constant''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.

In this there is another folder called as''' polymesh'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd polyMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd polymesh''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''ls''' and press '''Enter'''.
|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: For OpenFOAM v 5.0

To list the contents of the '''cavity''' directory, type:

'''$ls'''
'''0 constant system'''

To open the system directory, type:

'''$cd system'''

To list the contents of the system directory, type:

'''$ls'''
'''blockMeshDict controlDict fvSchemes fvSolution'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the blockMeshDict file.

Type gedit blockMeshDict
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This contains the '''geometry''' file called as '''blockMeshDict'''.

Open the '''blockMeshDict''' file with any '''editor''' of your choice.

In the '''terminal''' type '''gedit blockMeshDict'''.

Note that '''M''' and '''D''' here are capital and press '''Enter'''.

Let me drag this to the '''capture area'''.

Now minimise this.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slides
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover over the diagram
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''OpenFoam''' the entire geometry is broken into '''blocks.'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Block vertex starts from 0
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''blocks''' are numbered starting from''' 0 '''as shown in the figure.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For 2D geometry enter a unit thickness cell in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that in '''OpenFOAM''' for creating a '''2D geometry''', you need to give '''cell thickness value''' in the '''z-axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Dimension of Cavity
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Lid driven cavity''' is of '''length 1 and height 1'''.

Minimise the slide.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Create empty file

right click >create document>empty file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On your '''desktop''' create an '''empty file''' by

'''right click > create document > Empty file '''

Name this as '''blockMeshDict.'''

(Note that M and D here are capital)

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Copy data from old blockMeshDict file

upto convertToMeters
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|Open this.

Now copy the data from the original '''lid driven cavity blockMeshDict''' file to the new '''blockMeshDict''' file from '''line 0'''.

Scroll up. '''line 0''' upto '''convertTometers'''.

Copy this and paste it here.

Scroll down.

Now leave some space after '''convertTometers'''.

Enter '''1''' as the geometry is in meters.

Insert a semi-colon and press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the blockMeshDict file

type vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the file type '''vertices''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert the '''open bracket''' and press '''Enter'''.

Press the '''Tab''' key.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Start with point 0

(0 0 0) and move to positive x axis

enter (1 0 0)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Start with point '''0'''.

Insert open close brackets.

Enter

'''(0 space 0 space 0) '''and press '''Enter'''.

Again press '''Tab''' key.

Open close bracket.

Move towards point 1 in positive '''x-axis''' and enter '''(1 space 0 space 0)''' and press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 2 in the x-y plane
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Move towards point 2 in the '''positive x-y plane''' and enter '''(1 space 1 space 0)'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 3 in y direction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key. Open close bracket.

Enter the 3rd point in '''positive y axis (0 space 1 space 0 )'''

Press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point 4 in the front face

enter (1 0 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Again press the '''Tab''' key.

Enter the 4th point on the '''front face.

Open close bracket. (0 space 0 space 0.1)'''

And press '''Enter'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points 5,6,7 with unit cell thickness in z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter the other '''points''' with one unit value in the '''positive z -axis'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Inert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the''' bracket''' and insert a '''semicolon''' after it.

Press '''Enter'''.

Again press '''Enter'''.
|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blocks and insert (

Lid driven cavity is a single block
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below vertices are the '''blocks'''.

Type '''blocks''' and press '''Enter'''.

Insert an open bracket and press '''Enter'''.

Let me switch back to the slides.

Note that Lid driven cavity is taken as a '''single block '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the vertices of block

block (0 1 2 3 4 5 6 7 ) total 8 points
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to '''blockMeshDict'''.

Enter the points for the blocks in the clockwise sense.

We are using here hexahedral blocks for meshing.

Now type hex '''H E X''', leave some space, in brackets enter '''(0 space 1 space 2 space 3 space 4 space 5 space 6 space 7)'''. Again leave some space.

Note that for '''multiple blocks''' the points will be more.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter grid points in x, y and z axis
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| After this enter the '''grid points''' in the x,y,and z directions

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter the mesh/grid size

enter ( 30 30 1)
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''brackets''' enter '''(30 space 30 space 1)''', leave some space. You can '''modify''' the '''grid''' as when needed.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Grid point in z axis is kept as 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Grid point in z-axis''' can be taken as one

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter simpleGrading value ( 1 1 1 )

insert ) and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now leave some space and type '''simple grading''' leave some space and enter '''(1 space 1 space 1)'''.
This is the grid spacing in the x,y and z direction.

Press enter, insert a '''close bracket''' and insert the '''semicolon''' and press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type edges
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now type '''edges''' and press enter,as this is a simple geometry edges can be kept empty.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert ( );
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert '''open bracket''' press enter, close a bracket insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary conditions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Below '''edges''' are the '''boundary conditions'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here you need to enter the '''boundary name''' for the '''faces'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type boundary

insert (
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''boundary''' and press enter

insert a''' open bracket''' and press enter

Let me switch back to slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the geometry the '''upper wall is moving''' and other '''three walls are fixed'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Front and back faces are named as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''front and back faces''' are termed as '''empty''' as this is a 2D problem

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the current blockMeshDict file
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Open the '''New blockMeshDict''' file again

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patch as moving wall
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In '''boundary''' put the name of the '''patch''' as '''moving wall''' press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert {
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Insert a '''open curly bracket''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type of moving wall : wall

insert ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter '''type''' for the '''moving wall'''. Enter '''type space wall'''

insert a '''semicolon''' and press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now faces, now press enter, insert '''open bracket''', press enter, press a '''tab''' key, '''open close''' bracket and in this bracket type '''faces'''
Enter open and close brackets
In brackets enter the points for faces

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me switch back to the slides

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Geometry
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that order the points in such a way that the '''thumb''' should be '''normal''' to that '''face '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Clockwise curl of fingers
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| And '''fingers''' make a '''clockwise curl''' as shown in the figure

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Points should be entered matching the points inserted in vertices
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Also note that the '''points''' should match with the '''points inserted in vertices'''. Now let me switch back to new '''blockMeshDict''' file.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Enter (3 7 6 2)

insert } and ;
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Enter the '''face point'''s as '''(3 space 7 space 6 space 2)'''. Let me switch back to the slide. These are the points for the moving wall '''(3 7 6 2)'''. Minimize this. Note that you can start from any point on that face.
Now press enter. Close the bracket. You need to enter the '''semicolon'''.
After you insert the points for the faces again press enter. Close the '''curly''' bracket. Another note now after the curly brackets press enter again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary patches for fixedWalls
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Similarly enter '''boundary condition''' and '''faces''' for the '''fixed wall '''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| For front and back face enter type as empty
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Being a 2D problem the '''type of boundary'''

for '''front and back face''' can be kept as '''empty'''.
Refer to figure in this slide for entering the points.
Insert the '''closed brackets''' and put a '''semicolon'''. Again press enter. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Insert
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''mergePatchPairs''' and press enter. Since there are no patches to be merged, it can be kept empty. Insert the '''Open-closed brackets''' and insert a '''semicolon'''. Again press enter.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| BlockMeshDict file is completed

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We are done with creating the '''blockMeshDict''' file.

The complete''' blockMeshDict '''file is as shown here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the original blockMeshDict file

The command terminal will not work till blockMeshDict is closed
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close the '''original blockMeshDict''' file

Note that '''command terminal''' will not work until '''blockMeshDict file''' is '''closed'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd .. twice
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| type '''cd (dot) (dot)''' twice to return to the '''cavity''' folder '''Mesh the geometry'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Meshing, type blockMesh
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| in '''terminal''' type: '''blockMesh''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Viewing the geometry type paraFoam
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| View the '''geometry''' by typing in the '''command terminal''' '''paraFoam''' and press enter

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the object inspector menu click Apply
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| On the left hand side click '''Apply''' on '''object inspector menu'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we learnt:

Creating a simple geometry in '''OpenFOAM'''

Viewed the '''geometry''' in '''Paraview '''

This brings us to the end of the tutorial

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Assignment

Change the geometry parameters : Enter the '''grid point'''s as '''(40 40 1) and (50 50 1)'''.

View the geometry in '''paraview'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : About spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video available at this URL: [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial.org/What_is_a_Spoken_Tutorial]

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : about spoken tutorials
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to us at contact@spoken-tutorial.org

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Do you have questions on THIS Spoken Tutorial?
Choose the minute and second where you have the question
Explain your question briefly
Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Forum to answer questions
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Questions not related to the Spoken Tutorial?
Do you have general/technical questions on the Software?
Please visit the FOSSEE forum
http://forums.fossee.in/
Choose the Software and post your question

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Lab Migration project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : Case Study project
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide: Acknowledgement
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorials are part of Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on the same is available at the following URL link [http://spoken-tutorial.org/NMEICT-Intro http://spoken-tutorial.org/NMEICT-Intro]

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| About the contributor
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C3/Simulating-Hagen-Poiseuille-flow/English

2019-05-29T09:52:42Z

DeepaVedartham:

Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.

Script and Narration : Saurabh S. Sawant

Keywords: Video tutorial,CFD.

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1:

| Hello and welcome to the spoken tutorial on simulating '''Hagen-Poiseuille flow''' in '''OpenFOAM'''.

|-
| Slide 2 : Learning Objectives

| In this tutorial we will see:

* To create and '''mesh 3D cylindrical pipe.'''<br/>

* To '''simulate '''the '''Hagen-Poiseuille flow''' <br/> having''' fixed pressure ratio''' across '''boundaries.'''<br/> and

* To visualize the '''velocity contour '''in '''ParaView'''.

|-
| Slide 3: System Requirement

| To record this tutorial, I am using

*'''Linux Operating system Ubuntu '''12.04

*'''OpenFOAM version '''2.1.1 and

*'''ParaView''' '''version '''3.12.0

|-
| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet
|
|-
| Slide 5: Prerequisites

| To practice this tutorial learner should have the knowledge of

Basic '''Fluid Dynamics'''

and '''Hagen-Poiseuille''' '''flow'''

|-
| Slide 6:

Hagen-Poiseuille Flow Diagram

Read aloud the given points and show the contents in the diagram with the mouse pointer.
| Here is, '''Hagen-Poiseuille''' '''Flow''' Diagram.

We can see the '''dimensions and boundaries''' of the pipe.

'''Viscosity''' of the fluid used, that is, water is given.

Pressure at the '''inlet''' is 20''' Pascals''' and at the '''outlet''' is 0''' Pascals.'''

As it is an '''incompressible flow''', only the pressure difference is of importance.

|-
| Slide 7:

Formulas and Analytical Solution

Read aloud the given points
| '''Formulas and Analytical Solution:'''

For '''Hagen-Poiseuille flow,'''

'''Pressure drop''' along the pipe is:

('''P1 minus P2''') equals ('''32 mew Uaverage L''') upon ('''D square''')

By substituting the values from the previous diagram, we get,

'''Uaverage''' equals to 0.208 '''m/s'''

'''Maximum Velocity''' is given as,

Two times the '''average velocity''', which would be, 0.416''' m/s'''

'''Reynolds Number''' for the flow is,

'''Uaverage '''into '''D '''upon '''nu''', that comes out to be, '''2080'''

Hence, the flow is '''transient'''.

|-
| Slide 8: Solver

| Type of solver used here is,

'''IcoFOAM'''

It is a '''Transient Solver'''

It is used for '''incompressible, laminar flow of Newtonian fluids.'''

|-
| Slide 9:

Pressure Boundary Conditions

| '''Pressure Boundary Conditions '''used,

At '''Inlet: fixedPressure'''

At '''Outlet: fixedPressure'''

At '''Walls: ZeroGradient'''

|-
| Slide 10:

Velocity Boundary Conditions

| '''Velocity Boundary Conditions''' used,

At '''Inlet: pressureInletVelocity'''

At '''Outlet: zeroGradient'''

At '''Walls: fixedValue'''

|-
| Show 3dpipe folder.

Show the 3dpipe folder
| For executing this case,

First, Let's create the '''case directory''' in the ''''icoFoam'''' folder.

And Give it some name.

I have named it as''' '3dpipe''''.

|-
| Point the mouse pointer from lid driven folder to 3d pipe folder.
| To know the location of this folder, go through the tutorial on '''lid driven cavity'''.

Copy this ''''0' (zero), 'constant'''' and ''''system'''' folders of '''lid driven cavity''' problem in the newly created folder.

|-
| Go inside the 3dpipe folder.
| Let's go inside the ''''3dpipe'''' folder.

|-
| Hover the pointer over the folder inside the 3dpipe folder.
| I have already copied the folders into my ''''3dpipe'''' folder and modified the files in it.

|-
| Go into the '0' folder and open P file and show it
| Now, let's go into the ''''0'''' folder.

And open the ''''P'''' file.

This is the''' pressure boundary condition''' file.

|-
| Show the pressure boundary condition file and show the dimensions inside it.
| Note that the dimensions are in '''(meter square) per (second square)''' '''(m2/s2)'''.

|-
| Show the pressure value written
| Hence the''' pressure '''value in '''pascals''' is divided by the '''density''', that is, 1000''' Kg/m3''' '''(Kg per meter cube),''' and written here.

|-
| Close the file
| Let's close the file.

|-
| Open U file in the same folder and show
| File containing the '''velocity boundary condition '''is as seen:lets open the file we can see the '''velocity boundary condition ''' for inlet, outlet and fixed walls

|-
| Close the file and come out of the '0' folder
| Let's close the file and come out of the ''''0'''' folder.

|-
| Switch back to the slides
| To see the '''blocking strategy''', let me switch back to the slides.

|-
| Slide 11: Blocking Strategy

Hover the pointer on the geometry and drag it towards the z direction.
| To create a '''3D geometry''' of a pipe I have made a '''2D''' circular '''geometry '''and extruded the length in z direction.

|-
| Point out the numbering pattern.
| Numbering Pattern is as shown. You can also see the dimension of the mesh.

|-
| Minimize the slides
| To see the '''blockMeshDict''' file, let's minimize the slides.

|-
| Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it.
| Let's go into the folder ''''constant',''' and then ''''polyMesh'.''' lets open the'''blockMeshDict ' file. We can see the vertices, blocks,edges and boundaries for inlet, outlet and fixed walls.

|-
| Close the file and come out of the folder 'polyMesh
| Let's close the file and lets come out of the ''''polyMesh'''' folder.

|-
| Open and show transportProperties file and point at the value viscosity value
| We see the ''''transportProperties' '''file. Lets open the file

Note the '''dynamic viscosity '''value, here, is 1e-06.

|-
| Close the file and come out of the 'constant' folder.
| Let's close the file and come out of the 'folder ''''constant' ''.

|-
| Go into the system folder and open the controlDict file. Show it.
| Let's go into the ''''system'''' folder.

Now, let's have a look at the ''''controlDict'''' file.

|-
| Show time step value
| The solution '''converges''' after 18 seconds therefore the final '''time step''' is kept 19.The '''time step''' has been set to 1e-03.

|-
| Close the file and the Home folder
| Let's close the file.

Let's close the ''''Home'''' folder.

|-
| Press 'control', 'alt' and 't' keys altogether
| Now to '''execute''' the case, we will, first, go inside the ''''3dpipe'''' folder through terminal.Let's open the terminal by pressing ''''control', 'alt' '''and''' 't'''' key, altogether.

|-
| Type run and press Enter in the terminal.
| Type '''run''' and press '''Enter'''

|-
| Type cd (space) tutorials and press Enter
| Type '''cd''' '''(space) tutorials''' and press '''Enter'''

|-
| Type cd (space) incompressible and press Enter
| Type '''cd (space)''' '''incompressible''' and press '''Enter'''

|-
| Type cd (space) icoFoam and press Enter
| Type '''cd''' '''(space)''' '''icoFoam '''and press '''Enter'''

|-
| Type cd (space) 3dpipe and press Enter
| Type '''cd (space)''' '''3dpipe '''and press '''Enter'''

|-
| Type blockMesh and press Enter
| Now to create the '''mesh''', type '''blockMesh''' and press '''Enter'''.

'''Meshing''' has been done.

|-
| After the meshing is done, type icoFoam to start the iterations
| To start the '''iterations''' type '''icoFoam''' and press '''Enter'''.

We see the '''iterations''' are running.

|-
| After the iterations are done, type paraFoam for postprocessing the results and press Enter.
| Iterations has been done.

After the '''iterations''' end type '''paraFoam''' for '''postprocessing''' the results and press '''Enter'''. It will open the" paraview". This is " paraview"

|-
| Click on Apply.
| Let's click on '''Apply''' on the left hand side of the '''Object inspector menu''' to see the''' geometry.'''

|-
| Rotate the geometry by pressing the button of the mouse and move it in the required direction.
| Let's rotate the '''geometry''' for a better view.

|-
| Click on the active variable control menu and select U in the drop-down menu
| Click on the '''active variable control menu''' and select '''U''' in the drop-down menu.

|-
| Click on play button
| At the top, in '''VCR toolbar''', click on '''Play''' button.

|-
| Go to Object Inspector menu, go to Display, click on Rescale data range
| Go to '''Object Inspector menu''', go to '''Display''', click on '''Rescale''' to '''data range.'''

|-
| go to the toolbar named common, click on Clips and press Apply
| To view the half section, go to the toolbar named '''common''', click on '''Clips''' go to object inspector menu properties and press '''Apply'''.Lets Zoom in

|-
| Open the color legend
| Let's open the '''color legend.'''

|-
|
| We can see the '''maximum velocity''' is near to the actual '''maximum velocity'''i.e 0.4 metersp/s

|-
| Go to Filters> Data Analysis> Plot Over Lines
| To view the graph Go to '''Filters'''at the top '''Data Analysis'''and press '''Plot Over Lines.'''

|-
| click on Y axis and press Apply
|Press '''Y''' axis and press '''Apply'''.

|-
| Point towards the parabolic profile
| We can see the '''parabolic''' '''profile''' for '''Hagen-Poiseuille flow'''.

|-
| Close the graph
| Let's close the '''graph'''.

|-
| Close ParaView
| lets Close '''ParaView'''.

|-
| Switch to the slides
|And switch to the''' slides'''.

|-
| Slide 12: Summary
| In this tutorial we have learned:

*To create and mesh '''3D pipe geometry.
*To simulate '''Hagen-Poiseuille flow''' for a '''fixed pressure ratio'''across boundaries and
*To visualize the '''velocity''' results in '''Parafoam '''.

|-
| Slide 13 : Assignment

| As an assignment,

Change the '''geometry parameters '''such as length and diameter.

Change the corresponding '''pressure ratio.''' and

Use the fluid of different '''viscosity.'''

|-
| Slide 14: About Spoken tutorials

|
* Watch the video available at the following link

* It summarises the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

|-
| Slide 15: About Spoken tutorials

| The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to contact at spoken hyphen tutorial dot org

|-
| Slide 16: Forum to answer questions

* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 17: Forum to answer questions

* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|
|-
| Slide 18: Lab Migration project

* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 19: Case Study project

* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 20: Acknowledgement

| Spoken Tutorial Project is a part of the Talk to a Teacher project

* It is supported by the National Mission on Education through ICT, MHRD, Government of India

* More information on this Mission is available at

* spoken hyphen tutorial dot org slash NMEICT hyphen Intro
|}

OpenFOAM/C3/Simulating-Hagen-Poiseuille-flow/English

2019-05-29T09:50:32Z

DeepaVedartham:

Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.

Script and Narration : Saurabh S. Sawant

Keywords: Video tutorial,CFD.

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1:

| Hello and welcome to the spoken tutorial on simulating '''Hagen-Poiseuille flow''' in '''OpenFOAM'''.

|-
| Slide 2 : Learning Objectives

| In this tutorial we will see:

* To create and '''mesh 3D cylindrical pipe.'''<br/>

* To '''simulate '''the '''Hagen-Poiseuille flow''' <br/> having''' fixed pressure ratio''' across '''boundaries.'''<br/> and

* To visualize the '''velocity contour '''in '''ParaView'''.

|-
| Slide 3: System Requirement

| To record this tutorial, I am using

*'''Linux Operating system Ubuntu '''12.04

*'''OpenFOAM version '''2.1.1 and

*'''ParaView''' '''version '''3.12.0

|-
| Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet
|
|-
| Slide 5: Prerequisites

| To practice this tutorial learner should have the knowledge of

Basic '''Fluid Dynamics'''

and '''Hagen-Poiseuille''' '''flow'''

|-
| Slide 6:

Hagen-Poiseuille Flow Diagram

Read aloud the given points and show the contents in the diagram with the mouse pointer.
| Here is, '''Hagen-Poiseuille''' '''Flow''' Diagram.

We can see the '''dimensions and boundaries''' of the pipe.

'''Viscosity''' of the fluid used, that is, water is given.

Pressure at the '''inlet''' is 20''' Pascals''' and at the '''outlet''' is 0''' Pascals.'''

As it is an '''incompressible flow''', only the pressure difference is of importance.

|-
| Slide 7:

Formulas and Analytical Solution

Read aloud the given points
| '''Formulas and Analytical Solution:'''

For '''Hagen-Poiseuille flow,'''

'''Pressure drop''' along the pipe is:

('''P1 minus P2''') equals ('''32 mew Uaverage L''') upon ('''D square''')

By substituting the values from the previous diagram, we get,

'''Uaverage''' equals to 0.208 '''m/s'''

'''Maximum Velocity''' is given as,

Two times the '''average velocity''', which would be, 0.416''' m/s'''

'''Reynolds Number''' for the flow is,

'''Uaverage '''into '''D '''upon '''nu''', that comes out to be, '''2080'''

Hence, the flow is '''transient'''.

|-
| Slide 8: Solver

| Type of solver used here is,

'''IcoFOAM'''

It is a '''Transient Solver'''

It is used for '''incompressible, laminar flow of Newtonian fluids.'''

|-
| Slide 9:

Pressure Boundary Conditions

| '''Pressure Boundary Conditions '''used,

At '''Inlet: fixedPressure'''

At '''Outlet: fixedPressure'''

At '''Walls: ZeroGradient'''

|-
| Slide 10:

Velocity Boundary Conditions

| '''Velocity Boundary Conditions''' used,

At '''Inlet: pressureInletVelocity'''

At '''Outlet: zeroGradient'''

At '''Walls: fixedValue'''

|-
| Show 3dpipe folder.

Show the 3dpipe folder
| For executing this case,

First, Let's create the '''case directory''' in the ''''icoFoam'''' folder.

And Give it some name.

I have named it as''' '3dpipe''''.

|-
| Point the mouse pointer from lid driven folder to 3d pipe folder.
| To know the location of this folder, go through the tutorial on '''lid driven cavity'''.

Copy this ''''0' (zero), 'constant'''' and ''''system'''' folders of '''lid driven cavity''' problem in the newly created folder.

|-
| Go inside the 3dpipe folder.
| Let's go inside the ''''3dpipe'''' folder.

|-
| Hover the pointer over the folder inside the 3dpipe folder.
| I have already copied the folders into my ''''3dpipe'''' folder and modified the files in it.

|-
| Go into the '0' folder and open P file and show it
| Now, let's go into the ''''0'''' folder.

And open the ''''P'''' file.

This is the''' pressure boundary condition''' file.

|-
| Show the pressure boundary condition file and show the dimensions inside it.
| Note that the dimensions are in '''(meter square) per (second square)''' '''(m2/s2)'''.

|-
| Show the pressure value written
| Hence the''' pressure '''value in '''pascals''' is divided by the '''density''', that is, 1000''' Kg/m3''' '''(Kg per meter cube),''' and written here.

|-
| Close the file
| Let's close the file.

|-
| Open U file in the same folder and show
| File containing the '''velocity boundary condition '''is as seen:lets open the file we can see the '''velocity boundary condition ''' for inlet, outlet and fixed walls

|-
| Close the file and come out of the '0' folder
| Let's close the file and come out of the ''''0'''' folder.

|-
| Switch back to the slides
| To see the '''blocking strategy''', let me switch back to the slides.

|-
| Slide 11: Blocking Strategy

Hover the pointer on the geometry and drag it towards the z direction.
| To create a '''3D geometry''' of a pipe I have made a '''2D''' circular '''geometry '''and extruded the length in z direction.

|-
| Point out the numbering pattern.
| Numbering Pattern is as shown. You can also see the dimension of the mesh.

|-
| Minimize the slides
| To see the '''blockMeshDict''' file, let's minimize the slides.

|-
| Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it.
| Let's go into the folder ''''constant',''' and then ''''polyMesh'.''' lets open the'''blockMeshDict ' file. We can see the vertices, blocks,edges and boundaries for inlet, outlet and fixed walls.

|-
| Close the file and come out of the folder 'polyMesh
| Let's close the file and lets come out of the ''''polyMesh'''' folder.

|-
| Open and show transportProperties file and point at the value viscosity value
| We see the ''''transportProperties' '''file. Lets open the file

Note the '''dynamic viscosity '''value, here, is 1e-06.

|-
| Close the file and come out of the 'constant' folder.
| Let's close the file and come out of the 'folder ''''constant' ''.

|-
| Go into the system folder and open the controlDict file. Show it.
| Let's go into the ''''system'''' folder.

Now, let's have a look at the ''''controlDict'''' file.

|-
| Show time step value
| The solution '''converges''' after 18 seconds therefore the final '''time step''' is kept 19.The '''time step''' has been set to 1e-03.

|-
| Close the file and the Home folder
| Let's close the file.

Let's close the ''''Home'''' folder.

|-
| Press 'control', 'alt' and 't' keys altogether
| Now to '''execute''' the case, we will, first, go inside the ''''3dpipe'''' folder through terminal.Let's open the terminal by pressing ''''control', 'alt' '''and''' 't'''' key, altogether.

|-
| Type run and press Enter in the terminal.
| Type '''run''' and press '''Enter'''

|-
| Type cd (space) tutorials and press Enter
| Type '''cd''' '''(space) tutorials''' and press '''Enter'''

|-
| Type cd (space) incompressible and press Enter
| Type '''cd (space)''' '''incompressible''' and press '''Enter'''

|-
| Type cd (space) icoFoam and press Enter
| Type '''cd''' '''(space)''' '''icoFoam '''and press '''Enter'''

|-
| Type cd (space) 3dpipe and press Enter
| Type '''cd (space)''' '''3dpipe '''and press '''Enter'''

|-
| Type blockMesh and press Enter
| Now to create the '''mesh''', type '''blockMesh''' and press '''Enter'''.

'''Meshing''' has been done.

|-
| After the meshing is done, type icoFoam to start the iterations
| To start the '''iterations''' type '''icoFoam''' and press '''Enter'''.

We see the '''iterations''' are running.

|-
| After the iterations are done, type paraFoam for postprocessing the results and press Enter.
| Iterations has been done.

After the '''iterations''' end type '''paraFoam''' for '''postprocessing''' the results and press '''Enter'''. It will open the" paraview". This is " paraview"

|-
| Click on Apply.
| Let's click on '''Apply''' on the left hand side of the '''Object inspector menu''' to see the''' geometry.'''

|-
| Rotate the geometry by pressing the button of the mouse and move it in the required direction.
| Let's rotate the '''geometry''' for a better view.

|-
| Click on the active variable control menu and select U in the drop-down menu
| Click on the '''active variable control menu''' and select '''U''' in the drop-down menu.

|-
| Click on play button
| At the top, in '''VCR toolbar''', click on '''Play''' button.

|-
| Go to Object Inspector menu, go to Display, click on Rescale data range
| Go to '''Object Inspector menu''', go to '''Display''', click on '''Rescale''' to '''data range.'''

|-
| go to the toolbar named common, click on Clips and press Apply
| To view the half section, go to the toolbar named '''common''', click on '''Clips''' go to object inspector menu properties and press '''Apply'''.Lets Zoom in

|-
| Open the color legend
| Let's open the '''color legend.'''

|-
|
| We can see the '''maximum velocity''' is near to the actual '''maximum velocity'''i.e 0.4 metersp/s

|-
| Go to Filters> Data Analysis> Plot Over Lines
| To view the graph Go to '''Filters'''at the top '''Data Analysis'''and press '''Plot Over Lines.'''

|-
| click on Y axis and press Apply
|Press '''Y''' axis and press '''Apply'''.

|-
| Point towards the parabolic profile
| We can see the '''parabolic''' '''profile''' for '''Hagen-Poiseuille flow'''.

|-
| Close the graph
| Let's close the '''graph'''.

|-
| Close ParaView
| lets Close '''ParaView'''.

|-
| Switch to the slides
|And switch to the''' slides'''.

|-
| Slide 12: Summary
| In this tutorial we have learned:

*To create and mesh '''3D pipe geometry.
*To simulate '''Hagen-Poiseuille flow''' for a '''fixed pressure ratio'''across boundaries and
*To visualize the '''velocity''' results in '''Parafoam '''.

|-
| Slide 13 : Assignment

| As an assignment,

Change the '''geometry parameters '''such as length and diameter.

Change the corresponding '''pressure ratio.''' and

Use the fluid of different '''viscosity.'''

|-
| Slide 14: About Spoken tutorials

|
* Watch the video available at the following link

* It summarises the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

|-
| Slide 15: About Spoken tutorials

| The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to contact at spoken hyphen tutorial dot org

|-
| Slide 16: Forum to answer questions

* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 17: Forum to answer questions

* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|
|-
| Slide 18: Lab Migration project

* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 19: Case Study project

* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 20: Acknowledgement

| Spoken Tutorial Project is a part of the Talk to a Teacher project

* It is supported by the National Mission on Education through ICT, MHRD, Government of India

* More information on this Mission is available at

* spoken hyphen tutorial dot org slash NMEICT hyphen Intro
|}

OpenFOAM/C3/Flow-over-a-flat-plate/English

2019-05-29T09:48:40Z

DeepaVedartham:

Tutorial: Flow over a flat plate using OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flat plate, Boundary layer, glyph (vector plotting).

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1
| Hello and welcome to the spoken tutorial on Flow over a flat plate using '''OpenFOAM'''.

|-
| Slide 2 : Learning Objectives
| In this tutorial I will teach you about

* Geometry of the flat plate
* Changing the grid spacing in '''meshing'''
* Post Processing results in '''ParaView''' and
* Visualizing using '''Vector Plot'''.

|-
| Slide 3:

System Requirement
| To record this tutorial

I am using
* '''Linux''' Operating system '''Ubuntu''' version 12.04.
*'''OpenFOAM''' version 2.1.1 and
*'''ParaView''' version 3.12.0

|-
| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet
|

|-
| Slide 5: Flow over Flat Plate

|'''Flow over flat plate''' is a '''fundamental problem in fluid mechanics'''

|-
| Slide 6: Flow over Flat Plate

Flow over a flat plate diagram
| We can visualise the growth of '''boundary layer'''

'''Boundary layer''' is a very thin region above the body

where the velocity is 0.99 times the '''free stream velocity'''.

|-
| Slide 7: Diagram of boundary conditions.
| This is a '''diagram''' of '''flow over the flat plate'''

The''' boundary conditions''' are given as follows

*You have the '''Inlet'''
*the '''Plate'''
*'''Top''' – which is the '''Farfield'''
*and '''Outlet''' – which is the''' pressure outlet boundary'''
|-
| Slide 8: Inlet parameters
|
* The Free stream velocity '''U = 1 m/s''', and

* we are solving this for '''Reynolds no (Re) = 100'''

|-
| Click on home>> OpenFoam >> Run >> Tutorials >> Incompressible >> SimpleFoam
|Now let us Go to the '''Home''' folder, In the '''Home''' folder, click on the '''OpenFoam''' folder

Then go to the '''Run''' '''directory '''

You will see '''Tutorials. '''Click on it.

'''Scroll down''' and then click on '''Incompressible.'''

'''Scroll down'''.

You will see the '''simpleFoam '''folder.

Click on it

This '''solver''' suits our case.

|-
| Right click >> Create new folder >> flatplate
| In this, create a '''folder''' by the name '''flatplate.'''

Right click - '''Create New Folder -''' '''flatplate'''

|-
| Double-click '''pitzdaily '''folder
| Now, let's open the '''pitzdaily case.'''

|-
| Zoom in
| Let me zoom this.

|-
| Select '''0''', '''constant '''and '''system '''folders
| Copy the '''three folders''' - '''0''', '''constant '''and '''system'''

|-
| Copy them
| Copy this

|-
| Go back to '''SimpleFoam''' >> '''flatplate '''folder

Paste them there
| Now let us go one level back.

Paste these three '''folders''' inside the''' flatplate '''folder.

|-
| Click on '''constant >> polyMesh'''
| Open the '''constant folder''' and then the '''polyMesh folder'''

|-
|
| Change the geometry and boundary condition names in the '''blockMeshDict '''file.

|-
|
| I have already made the changes.

Let us open the '''blockMeshDict''' file . Scroll down

The geometry is in '''meters'''.

|-
|
| We have set the '''dimensions''' of the '''flatplate'''

|-
| Simplegrading (1 3 1)
| We can see that '''simpleGrading. '''

It is kept as (1 3 1) as we need a finer '''mesh''' near the plate.

|-
|
| Now close this.

Go two '''levels''' back.

|-
|
| Similarly, make changes in the '''boundary condition''' names inside the '''files''' in the '''0''' folder.

These '''files''' have '''pressure''', '''velocity''' and '''wall''' functions.

|-
|
| To '''calculate''' the values of '''wall''' functions,

please refer to the earlier '''tutorials''' in the '''OpenFoam''' series.

Let us go one '''level''' back.

|-
|
| The '''system''' folder can be kept '''default'''

Let us close this

|-
|Let us Open the terminal window :

Press Ctrl+Alt+t keys simultaneously
| Now let us open the '''terminal window.'''

In the '''terminal window''', type '''run '''and press '''Enter.'''

|-
| Type cd tutorials
| Type '''cd space tutorials '' press''' Enter.'''

|-
| Type cd incompressible
| Type '''cd incompressible '''press''' Enter.'''

|-
| Type cd simpleFoam
| Type '''cd space simpleFoam '''press''' Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| We can see the '''flatplate''' folder.

|-
| Type cd flatplate
| Now type '''cd space flatplate '''and press '''Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| You can see the three '''folders''' '''0,constant''' and '''system.'''

|-
| Type blockMesh
| Now, we will mesh the geometry.

We are using a '''course mesh''' for this problem.

'''Meshing''' can be done by typing '''blockMesh''' in the '''terminal'''.

|-
|
| Press '''Enter.'''

'''Meshing''' has been done.

|-
|
| Note that if there is some error in the '''blockMesh''' file,

it will be shown in the '''terminal''' window.

|-
| Type paraFoam
| To view the geometry, type “'''paraFoam'''”

press '''Enter.'''

|-
| Paraview window click on APPLY button on left hand side

| After the '''ParaView''' window opens, on the left hand side of the '''object inspector''' menu, click '''Apply'''.

We can see the '''geometry'''.

Close the '''ParaView''' window.

Let me switch back to the''' slides.'''

|-
| Slide 9: solver
| The solver we are using here is: '''simpleFoam.'''

'''SimpleFoam''' is a '''steady state solver '''for '''incompressible '''

and''' turbulent''' flows

|-
| Demo :

type simpleFoam
| Let me switch back to the '''terminal '''window.

In the '''terminal window''' ,type '''simpleFoam''' and press '''Enter.'''

You will see the '''iterations''' running in the '''terminal '''window.

|-
| Type paraFoam
| Once the solving is done, type '''paraFoam''' to view the results.

|-
| In the Paraview window click on APPLY button on left hand side
| On the left hand side of the '''Object Inspector''' menu, click '''Apply to '''view the geometry.

|-
| Properties
| Scroll down the '''properties''' panel of the '''Object Inspector''' menu for '''time step''', '''regions''' and '''fields'''

|-
| Change the drop down menu from Solid Color to U
| To view the '''contours''' from the''' '''drop down menu,

in the '''Active Variable Control '''menu,

change from '''solid color''' to '''capital U'''

|-
|
| You can see the initial condition of the '''velocity'''

|-
| VCR control
| Now on top of the '''ParaView''' window, you will see the '''VCR''' controls.

|-
| Click on Play button of VCR control
| Click on the '''Play''' button.

|-
|
| You will see the '''contour''' of '''Pressure''' or '''Velocity''' on the flat plate accordingly

|-
| Toggle on the '''Color legend'''
| This is the '''velocity contour'''

'''Toggle''' on the '''Color legend'''

|-
| Color legend left hand side top icon
| To do this, click on the '''color legend '''icon on the '''Active Variable Control''' menu

|-
| Click on APPLY button
| Click '''Apply''' in the '''Object inspector '''menu

|-
| Click on Display
| In the '''Object inspector '''menu, click on '''Display'''

|-
| Click on rescale to data range
|'''Scroll down''' and click on '''Rescale''' '''to data range'''

|-
| Shift color legend on top of the geometry
| Let me shift this '''Color legend''' on top

|-
| Top menu >> Filter > Common > glyph
| To visualize the '''Vector Plot''',

go to the '''Filters Menu''' > '''Common''' > '''glyph'''

|-
|
| Go to the '''Properties''' in '''Object Inspector menu'''

|-
|
| Click '''Apply''' on the left hand side of '''Object Inspector Menu'''.

|-
| Changing vector size
| You can change the number of '''vectors''' by changing their size at the bottom.

|-
| Scroll down and click on edit button

set scale factor 0.1
| Also, the size of the '''vectors''' can be changed by '''clicking''' on the '''Edit''' button.

The '''set scale''' '''factor''' can be changed to '''0.1'''

|-
| Click the apply button
| Again, click the '''Apply''' button.

|-
|
| Now let me zoom this

|-
| Click on ZoomToBox icon
| To do this, in the '''Active Variable Control '''menu, click on '''zoomToBox '''option

|-
|
| And '''zoom''' over any area that you desire

|-
| Parabolic variation of vector plot
| We can see the '''parabolic variation''' of '''vector plot '''as the '''flow''' moves over the''' plate'''.

|-
| Delete the vector plot
| Delete this. Now delete the '''vector plot.'''

|-
| Corresponding to color of 1 in color legend
| Also, we can see that the color near to 1

corresponds to the '''velocity''' of '''0.99 '''times the free stream velocity.

|-
| To plot the data along x and y axis
| You can also plot the '''variation''' of velocity along the '''x '''and '''y '''axes using the '''plot data over line'''.

|-
| Slide 10: Summary
| This brings us to the end of the tutorial.

In this tutorial we learnt :

* '''Geometry and meshing''' of the '''flat plate geometry''' and
* Vector plotting in '''ParaView'''

|-
| Slide 11: Assignment
| As an Assignment,

Create a '''geometry''' of '''flow over a flat plate'''

'''Refine the grid spacing''' near the plate

|-
| Slide 12 : About Spoken tutorials
|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| Slide 13: Spoken Tutorial Worekshops
| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| Slide 14: Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/
|
|-
| Slide 15: Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question
|

|-
| Slide 16: Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/
|

|-
| Slide 17: Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/
|
|-
| Slide 18:

Acknowledgement

| Spoken Tutorial project is a part of the Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| About the contributor
| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C3/Flow-over-a-flat-plate/English

2019-05-29T09:45:13Z

DeepaVedartham:

Tutorial: Flow over a flat plate using OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flat plate, Boundary layer, glyph (vector plotting).

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1
| Hello and welcome to the spoken tutorial on Flow over a flat plate using '''OpenFOAM'''.

|-
| Slide 2 : Learning Objectives
| In this tutorial I will teach you about

* Geometry of the flat plate
* Changing the grid spacing in '''meshing'''
* Post Processing results in '''ParaView''' and
* Visualizing using '''Vector Plot'''.

|-
| Slide 3:

System Requirement
| To record this tutorial

I am using
* '''Linux''' Operating system '''Ubuntu''' version 12.04.
*'''OpenFOAM''' version 2.1.1 and
*'''ParaView''' version 3.12.0

|-
| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

|-
| Slide 5: Flow over Flat Plate

|'''Flow over flat plate''' is a '''fundamental problem in fluid mechanics'''

|-
| Slide 6: Flow over Flat Plate

Flow over a flat plate diagram
| We can visualise the growth of '''boundary layer'''

'''Boundary layer''' is a very thin region above the body

where the velocity is 0.99 times the '''free stream velocity'''.

|-
| Slide 7: Diagram of boundary conditions.
| This is a '''diagram''' of '''flow over the flat plate'''

The''' boundary conditions''' are given as follows

*You have the '''Inlet'''
*the '''Plate'''
*'''Top''' – which is the '''Farfield'''
*and '''Outlet''' – which is the''' pressure outlet boundary'''
|-
| Slide 8: Inlet parameters
|
* The Free stream velocity '''U = 1 m/s''', and

* we are solving this for '''Reynolds no (Re) = 100'''

|-
| Click on home>> OpenFoam >> Run >> Tutorials >> Incompressible >> SimpleFoam
|Now let us Go to the '''Home''' folder, In the '''Home''' folder, click on the '''OpenFoam''' folder

Then go to the '''Run''' '''directory '''

You will see '''Tutorials. '''Click on it.

'''Scroll down''' and then click on '''Incompressible.'''

'''Scroll down'''.

You will see the '''simpleFoam '''folder.

Click on it

This '''solver''' suits our case.

|-
| Right click >> Create new folder >> flatplate
| In this, create a '''folder''' by the name '''flatplate.'''

Right click - '''Create New Folder -''' '''flatplate'''

|-
| Double-click '''pitzdaily '''folder
| Now, let's open the '''pitzdaily case.'''

|-
| Zoom in
| Let me zoom this.

|-
| Select '''0''', '''constant '''and '''system '''folders
| Copy the '''three folders''' - '''0''', '''constant '''and '''system'''

|-
| Copy them
| Copy this

|-
| Go back to '''SimpleFoam''' >> '''flatplate '''folder

Paste them there
| Now let us go one level back.

Paste these three '''folders''' inside the''' flatplate '''folder.

|-
| Click on '''constant >> polyMesh'''
| Open the '''constant folder''' and then the '''polyMesh folder'''

|-
|
| Change the geometry and boundary condition names in the '''blockMeshDict '''file.

|-
|
| I have already made the changes.

Let us open the '''blockMeshDict''' file . Scroll down

The geometry is in '''meters'''.

|-
|
| We have set the '''dimensions''' of the '''flatplate'''

|-
| Simplegrading (1 3 1)
| We can see that '''simpleGrading. '''

It is kept as (1 3 1) as we need a finer '''mesh''' near the plate.

|-
|
| Now close this.

Go two '''levels''' back.

|-
|
| Similarly, make changes in the '''boundary condition''' names inside the '''files''' in the '''0''' folder.

These '''files''' have '''pressure''', '''velocity''' and '''wall''' functions.

|-
|
| To '''calculate''' the values of '''wall''' functions,

please refer to the earlier '''tutorials''' in the '''OpenFoam''' series.

Let us go one '''level''' back.

|-
|
| The '''system''' folder can be kept '''default'''

Let us close this

|-
|Let us Open the terminal window :

Press Ctrl+Alt+t keys simultaneously
| Now let us open the '''terminal window.'''

In the '''terminal window''', type '''run '''and press '''Enter.'''

|-
| Type cd tutorials
| Type '''cd space tutorials '' press''' Enter.'''

|-
| Type cd incompressible
| Type '''cd incompressible '''press''' Enter.'''

|-
| Type cd simpleFoam
| Type '''cd space simpleFoam '''press''' Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| We can see the '''flatplate''' folder.

|-
| Type cd flatplate
| Now type '''cd space flatplate '''and press '''Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| You can see the three '''folders''' '''0,constant''' and '''system.'''

|-
| Type blockMesh
| Now, we will mesh the geometry.

We are using a '''course mesh''' for this problem.

'''Meshing''' can be done by typing '''blockMesh''' in the '''terminal'''.

|-
|
| Press '''Enter.'''

'''Meshing''' has been done.

|-
|
| Note that if there is some error in the '''blockMesh''' file,

it will be shown in the '''terminal''' window.

|-
| Type paraFoam
| To view the geometry, type “'''paraFoam'''”

press '''Enter.'''

|-
| Paraview window click on APPLY button on left hand side

| After the '''ParaView''' window opens, on the left hand side of the '''object inspector''' menu, click '''Apply'''.

We can see the '''geometry'''.

Close the '''ParaView''' window.

Let me switch back to the''' slides.'''

|-
| Slide 9: solver
| The solver we are using here is: '''simpleFoam.'''

'''SimpleFoam''' is a '''steady state solver '''for '''incompressible '''

and''' turbulent''' flows

|-
| Demo :

type simpleFoam
| Let me switch back to the '''terminal '''window.

In the '''terminal window''' ,type '''simpleFoam''' and press '''Enter.'''

You will see the '''iterations''' running in the '''terminal '''window.

|-
| Type paraFoam
| Once the solving is done, type '''paraFoam''' to view the results.

|-
| In the Paraview window click on APPLY button on left hand side
| On the left hand side of the '''Object Inspector''' menu, click '''Apply to '''view the geometry.

|-
| Properties
| Scroll down the '''properties''' panel of the '''Object Inspector''' menu for '''time step''', '''regions''' and '''fields'''

|-
| Change the drop down menu from Solid Color to U
| To view the '''contours''' from the''' '''drop down menu,

in the '''Active Variable Control '''menu,

change from '''solid color''' to '''capital U'''

|-
|
| You can see the initial condition of the '''velocity'''

|-
| VCR control
| Now on top of the '''ParaView''' window, you will see the '''VCR''' controls.

|-
| Click on Play button of VCR control
| Click on the '''Play''' button.

|-
|
| You will see the '''contour''' of '''Pressure''' or '''Velocity''' on the flat plate accordingly

|-
| Toggle on the '''Color legend'''
| This is the '''velocity contour'''

'''Toggle''' on the '''Color legend'''

|-
| Color legend left hand side top icon
| To do this, click on the '''color legend '''icon on the '''Active Variable Control''' menu

|-
| Click on APPLY button
| Click '''Apply''' in the '''Object inspector '''menu

|-
| Click on Display
| In the '''Object inspector '''menu, click on '''Display'''

|-
| Click on rescale to data range
|'''Scroll down''' and click on '''Rescale''' '''to data range'''

|-
| Shift color legend on top of the geometry
| Let me shift this '''Color legend''' on top

|-
| Top menu >> Filter > Common > glyph
| To visualize the '''Vector Plot''',

go to the '''Filters Menu''' > '''Common''' > '''glyph'''

|-
|
| Go to the '''Properties''' in '''Object Inspector menu'''

|-
|
| Click '''Apply''' on the left hand side of '''Object Inspector Menu'''.

|-
| Changing vector size
| You can change the number of '''vectors''' by changing their size at the bottom.

|-
| Scroll down and click on edit button

set scale factor 0.1
| Also, the size of the '''vectors''' can be changed by '''clicking''' on the '''Edit''' button.

The '''set scale''' '''factor''' can be changed to '''0.1'''

|-
| Click the apply button
| Again, click the '''Apply''' button.

|-
|
| Now let me zoom this

|-
| Click on ZoomToBox icon
| To do this, in the '''Active Variable Control '''menu, click on '''zoomToBox '''option

|-
|
| And '''zoom''' over any area that you desire

|-
| Parabolic variation of vector plot
| We can see the '''parabolic variation''' of '''vector plot '''as the '''flow''' moves over the''' plate'''.

|-
| Delete the vector plot
| Delete this. Now delete the '''vector plot.'''

|-
| Corresponding to color of 1 in color legend
| Also, we can see that the color near to 1

corresponds to the '''velocity''' of '''0.99 '''times the free stream velocity.

|-
| To plot the data along x and y axis
| You can also plot the '''variation''' of velocity along the '''x '''and '''y '''axes using the '''plot data over line'''.

|-
| Slide 10: Summary
| This brings us to the end of the tutorial.

In this tutorial we learnt :

* '''Geometry and meshing''' of the '''flat plate geometry''' and
* Vector plotting in '''ParaView'''

|-
| Slide 11: Assignment
| As an Assignment,

Create a '''geometry''' of '''flow over a flat plate'''

'''Refine the grid spacing''' near the plate

|-
| Slide 12 : About Spoken tutorials
|
* Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| Slide 13: Spoken Tutorial Worekshops
| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| Slide 14: Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-
| Slide 15: Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question

|-
| Slide 16: Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-
| Slide 17: Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-
| Slide 18:

Acknowledgement

| Spoken Tutorial project is a part of the Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| About the contributor
| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}

OpenFOAM/C3/Flow-over-a-flat-plate/English

2019-05-29T09:35:41Z

DeepaVedartham:

Tutorial: Flow over a flat plate using OpenFOAM.

Script and Narration: Rahul Joshi

Keywords: Video tutorial, CFD, Flat plate, Boundary layer, glyph (vector plotting).

{|Border=1
!Visual Cue
!Narration

|-
| Slide 1
| Hello and welcome to the spoken tutorial on Flow over a flat plate using '''OpenFOAM'''.

|-
| Slide 2 : Learning Objectives
| In this tutorial I will teach you about

* Geometry of the flat plate
* Changing the grid spacing in '''meshing'''
* Post Processing results in '''ParaView''' and
* Visualizing using '''Vector Plot'''.

|-
| Slide 3:

System Requirement
| To record this tutorial

I am using
* '''Linux''' Operating system '''Ubuntu''' version 12.04.
*'''OpenFOAM''' version 2.1.1 and
*'''ParaView''' version 3.12.0

|-
| Slide 4:

System Requirement
* The tutorials were recorded using the versions specified in previous slide

* Subsequently the tutorials were edited to latest versions

* To install latest system requirements go to Installation Sheet

|-
| Slide 5: Flow over Flat Plate

|'''Flow over flat plate''' is a '''fundamental problem in fluid mechanics'''

|-
| Slide 6: Flow over Flat Plate

Flow over a flat plate diagram
| We can visualise the growth of '''boundary layer'''

'''Boundary layer''' is a very thin region above the body

where the velocity is 0.99 times the '''free stream velocity'''.

|-
| Slide 7: Diagram of boundary conditions.
| This is a '''diagram''' of '''flow over the flat plate'''

The''' boundary conditions''' are given as follows

*You have the '''Inlet'''
*the '''Plate'''
*'''Top''' – which is the '''Farfield'''
*and '''Outlet''' – which is the''' pressure outlet boundary'''
|-
| Slide 8: Inlet parameters
|
* The Free stream velocity '''U = 1 m/s''', and

* we are solving this for '''Reynolds no (Re) = 100'''

|-
| Click on home>> OpenFoam >> Run >> Tutorials >> Incompressible >> SimpleFoam
|Now let us Go to the '''Home''' folder, In the '''Home''' folder, click on the '''OpenFoam''' folder

Then go to the '''Run''' '''directory '''

You will see '''Tutorials. '''Click on it.

'''Scroll down''' and then click on '''Incompressible.'''

'''Scroll down'''.

You will see the '''simpleFoam '''folder.

Click on it

This '''solver''' suits our case.

|-
| Right click >> Create new folder >> flatplate
| In this, create a '''folder''' by the name '''flatplate.'''

Right click - '''Create New Folder -''' '''flatplate'''

|-
| Double-click '''pitzdaily '''folder
| Now, let's open the '''pitzdaily case.'''

|-
| Zoom in
| Let me zoom this.

|-
| Select '''0''', '''constant '''and '''system '''folders
| Copy the '''three folders''' - '''0''', '''constant '''and '''system'''

|-
| Copy them
| Copy this

|-
| Go back to '''SimpleFoam''' >> '''flatplate '''folder

Paste them there
| Now let us go one level back.

Paste these three '''folders''' inside the''' flatplate '''folder.

|-
| Click on '''constant >> polyMesh'''
| Open the '''constant folder''' and then the '''polyMesh folder'''

|-
|
| Change the geometry and boundary condition names in the '''blockMeshDict '''file.

|-
|
| I have already made the changes.

Let us open the '''blockMeshDict''' file . Scroll down

The geometry is in '''meters'''.

|-
|
| We have set the '''dimensions''' of the '''flatplate'''

|-
| Simplegrading (1 3 1)
| We can see that '''simpleGrading. '''

It is kept as (1 3 1) as we need a finer '''mesh''' near the plate.

|-
|
| Now close this.

Go two '''levels''' back.

|-
|
| Similarly, make changes in the '''boundary condition''' names inside the '''files''' in the '''0''' folder.

These '''files''' have '''pressure''', '''velocity''' and '''wall''' functions.

|-
|
| To '''calculate''' the values of '''wall''' functions,

please refer to the earlier '''tutorials''' in the '''OpenFoam''' series.

Let us go one '''level''' back.

|-
|
| The '''system''' folder can be kept '''default'''

Let us close this

|-
|Let us Open the terminal window :

Press Ctrl+Alt+t keys simultaneously
| Now let us open the '''terminal window.'''

In the '''terminal window''', type '''run '''and press '''Enter.'''

|-
| Type cd tutorials
| Type '''cd space tutorials '' press''' Enter.'''

|-
| Type cd incompressible
| Type '''cd incompressible '''press''' Enter.'''

|-
| Type cd simpleFoam
| Type '''cd space simpleFoam '''press''' Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| We can see the '''flatplate''' folder.

|-
| Type cd flatplate
| Now type '''cd space flatplate '''and press '''Enter.'''

|-
| Type ls
| Now type '''ls''' and press '''Enter.'''

|-
|
| You can see the three '''folders''' '''0,constant''' and '''system.'''

|-
| Type blockMesh
| Now, we will mesh the geometry.

We are using a '''course mesh''' for this problem.

'''Meshing''' can be done by typing '''blockMesh''' in the '''terminal'''.

|-
|
| Press '''Enter.'''

'''Meshing''' has been done.

|-
|
| Note that if there is some error in the '''blockMesh''' file,

it will be shown in the '''terminal''' window.

|-
| Type paraFoam
| To view the geometry, type “'''paraFoam'''”

press '''Enter.'''

|-
| Paraview window click on APPLY button on left hand side

| After the '''ParaView''' window opens, on the left hand side of the '''object inspector''' menu, click '''Apply'''.

We can see the '''geometry'''.

Close the '''ParaView''' window.

Let me switch back to the''' slides.'''

|-
| Slide 9: solver
| The solver we are using here is: '''simpleFoam.'''

'''SimpleFoam''' is a '''steady state solver '''for '''incompressible '''

and''' turbulent''' flows

|-
| Demo :

type simpleFoam
| Let me switch back to the '''terminal '''window.

In the '''terminal window''' ,type '''simpleFoam''' and press '''Enter.'''

You will see the '''iterations''' running in the '''terminal '''window.

|-
| Type paraFoam
| Once the solving is done, type '''paraFoam''' to view the results.

|-
| In the Paraview window click on APPLY button on left hand side
| On the left hand side of the '''Object Inspector''' menu, click '''Apply to '''view the geometry.

|-
| Properties
| Scroll down the '''properties''' panel of the '''Object Inspector''' menu for '''time step''', '''regions''' and '''fields'''

|-
| Change the drop down menu from Solid Color to U
| To view the '''contours''' from the''' '''drop down menu,

in the '''Active Variable Control '''menu,

change from '''solid color''' to '''capital U'''

|-
|
| You can see the initial condition of the '''velocity'''

|-
| VCR control
| Now on top of the '''ParaView''' window, you will see the '''VCR''' controls.

|-
| Click on Play button of VCR control
| Click on the '''Play''' button.

|-
|
| You will see the '''contour''' of '''Pressure''' or '''Velocity''' on the flat plate accordingly

|-
| Toggle on the '''Color legend'''
| This is the '''velocity contour'''

'''Toggle''' on the '''Color legend'''

|-
| Color legend left hand side top icon
| To do this, click on the '''color legend '''icon on the '''Active Variable Control''' menu

|-
| Click on APPLY button
| Click '''Apply''' in the '''Object inspector '''menu

|-
| Click on Display
| In the '''Object inspector '''menu, click on '''Display'''

|-
| Click on rescale to data range
|'''Scroll down''' and click on '''Rescale''' '''to data range'''

|-
| Shift color legend on top of the geometry
| Let me shift this '''Color legend''' on top

|-
| Top menu >> Filter > Common > glyph
| To visualize the '''Vector Plot''',

go to the '''Filters Menu''' > '''Common''' > '''glyph'''

|-
|
| Go to the '''Properties''' in '''Object Inspector menu'''

|-
|
| Click '''Apply''' on the left hand side of '''Object Inspector Menu'''.

|-
| Changing vector size
| You can change the number of '''vectors''' by changing their size at the bottom.

|-
| Scroll down and click on edit button

set scale factor 0.1
| Also, the size of the '''vectors''' can be changed by '''clicking''' on the '''Edit''' button.

The '''set scale''' '''factor''' can be changed to '''0.1'''

|-
| Click the apply button
| Again, click the '''Apply''' button.

|-
|
| Now let me zoom this

|-
| Click on ZoomToBox icon
| To do this, in the '''Active Variable Control '''menu, click on '''zoomToBox '''option

|-
|
| And '''zoom''' over any area that you desire

|-
| Parabolic variation of vector plot
| We can see the '''parabolic variation''' of '''vector plot '''as the '''flow''' moves over the''' plate'''.

|-
| Delete the vector plot
| Delete this. Now delete the '''vector plot.'''

|-
| Corresponding to color of 1 in color legend
| Also, we can see that the color near to 1

corresponds to the '''velocity''' of '''0.99 '''times the free stream velocity.

|-
| To plot the data along x and y axis
| You can also plot the '''variation''' of velocity along the '''x '''and '''y '''axes using the '''plot data over line'''.

|-
| Slide 10: Summary
| This brings us to the end of the tutorial.

In this tutorial we learnt :

* '''Geometry and meshing''' of the '''flat plate geometry''' and
* Vector plotting in '''ParaView'''

|-
| Slide 11: Assignment
| As an Assignment,

Create a '''geometry''' of '''flow over a flat plate'''

'''Refine the grid spacing''' near the plate

|-
| Slide 12 : About Spoken tutorials
| * Watch the video available at this URL:

http://spoken-tutorial.org/What_is_a_Spoken_Tutorial

* It summarizes the Spoken Tutorial project.

* If you do not have good bandwidth, you can download and watch it.

|-
| Slide 13: Spoken Tutorial Worekshops
| The Spoken Tutorial Project Team

-Conducts workshops using spoken tutorials

-Gives certificates to those who pass an online test

-For more details, please write to

contact@spoken-tutorial.org

|-
| Slide 14: Forum to answer questions
* Do you have questions on THIS Spoken Tutorial?
* Choose the minute and second where you have the question
* Explain your question briefly
* Someone from the FOSSEE team will answer them. Please visit
http://forums.spoken-tutorial.org/

|-
| Slide 15: Forum to answer questions
* Questions not related to the Spoken Tutorial?
* Do you have general/technical questions on the Software?
* Please visit the FOSSEE forum
http://forums.fossee.in/
* Choose the Software and post your question

|-
| Slide 16: Lab Migration Project
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
For more details visit this site:
http://cfd.fossee.in/

|-
| Slide 17: Case Study Project
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
* We give honorarium and certificate to those who do this
For more details visit this site:
http://cfd.fossee.in/

|-
| Slide 18:

Acknowledgement

| Spoken Tutorial project is a part of the Talk to a Teacher project,

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro

|-
| About the contributor
| This is Rahul Joshi from IIT BOMBAY signing off.

Thanks for joining.

|}