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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..."

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<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/Basic-Post-Processing-using-ParaView/English - Revision history

Nancyvarkey at 13:05, 26 August 2019

Nancyvarkey at 13:08, 22 August 2019

DeepaVedartham: Created page with "Tutorial : Basic Post-Processing using ParaView Script : Subhasree Basu Narration : Deepa Vedartham Keywords: OpenFOAM-5, Velocity vecto..."