Difference between revisions of "OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English"
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Revision as of 13:21, 6 March 2013
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.
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Slide 1:
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Hello and welcome to the spoken tutorial on modelling Turbulent flow in a Lid Driven Cavity using OpenFOAM
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Slide 2:
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In this tutorial I will show you
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Slide 3:
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To record this tutorial I am using Linux operating system Ubuntu 12.04
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Slide 4 :
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To practice this tutorial you should have some basic knowledge of
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Demo:
Set up working Directory
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This problem is identical in geometry and boundary
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Slide 5: Solver | We will be using the Transient solver for incompressible,
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Steps in setting up the problem | Now let me open the terminal window
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In the terminal window
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In the terminal window type run and press enter
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Two Folders les and ras
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Now type ls and press enter
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Cavity folder | Our folder name is cavity.
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Boundary and Initial conditions
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In this you will see three folders 0,constant and system.
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Inside the 0 folder
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Type the following command
cd 0 and press enter
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Let us view the constant folder | Now type cd .. and press enter
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PolyMesh folder and fluid property files
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In this you will see the polyMesh folder containing the geometry
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RASProperties | In the terminal type gedit (space) RASProperties and press enter.
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turbulentProperties | Now in the command terminal now type
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TransportModel
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Now let us open the transportProperties file
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Do ot change the blockMeshDict file
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We are not changing the geometry in this case
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Meshing the geometry
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We are done with the setup
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Running the solver : pisoFoam | Now we can run the solver
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Post-processing the results in paraview | Iterations will stop at the end of the time step.
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View the geometry
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On the left hand side in the Object Inspector menu click on Apply
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Click on the Play button on VCR control for animation
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Now on top of the paraview window you can see the VCR control
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Visualise the streamlines
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To visualise the stream lines
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Streamlines on top of the | On the left hand side of the Object inspector menu click on Apply.
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Plot streamlines about X, Y and Z axis
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You can see the X, Y and Z axis which are visible
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Plot data over line
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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 |
Plot the results
For Re= 10000 |
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 |
Slide :
Summary |
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 |
Slide : Assignment | As an assignment
Modify the grid size of the cavity Change it to (100 100 1) Visualise the results in paraview using streamlines |
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. | |
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 | |
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 | |
About the contributor | The script is contributed by Shekhar Mishra and Chaitanya talnikar
This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining |