Difference between revisions of "OpenFOAM/C3/Importing-mesh-file-in-OpenFOAM/English-timed"
From Script | Spoken-Tutorial
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| In this tutorial, you will learn to: | | In this tutorial, you will learn to: | ||
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* from a meshing software | * from a meshing software | ||
* in '''OpenFOAM'''. | * in '''OpenFOAM'''. | ||
Revision as of 15:39, 27 November 2015
| Time | Narration |
| 00:00 | Hello and welcome to the spoken tutorial on Importing Mesh files in OpenFOAM |
| 00:07 | In this tutorial, you will learn to:
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| 00:14 | To record this tutorial I am using
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| 00:26 | As a pre-requisite, the user should know how to generate a Mesh in software like -
Gambit, Ansys ICEM , CFX, Salome etc. |
| 00:40 | *Using blockMesh, we can easily make simple geometries.*For example- box, pipe etc.
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| 00:53 | *But OpenFOAM supports importing mesh from third party meshing software.
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| 01:05 | We will now learn to import these files. |
| 01:08 | Here is the geometry of our case.
We have a square cylinder
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| 01:22 | *We are solving this for a Reynolds Number (Re) = 100 *The domain chosen is 40m by 60m *The Boundary conditions are as shown in the diagram |
| 01:36 | This is the mesh file generated in a meshing software. |
| 01:40 | In your OpenFOAM working directory, go to the icoFoam solver and click on it. |
| 01:47 | Now Create a folder by the name cylinder |
| 01:52 | Now go to the cavity case.Copy the 0 and system folders from the cavity case. |
| 01:59 | Paste this inside the cylinder folder.Note that, you do not need the constant folder. |
| 02:10 | On my desktop, I have a Fluent mesh file with a .(dot) msh extension.It is named as cylmesh.msh |
| 02:23 | Copy-and-paste this file in the cylinder folder in icoFoam.Our setup is now ready. |
| 02:32 | Open the command terminal.Type run and press Enter. |
| 02:37 | Type cd tutorials; press Enter. |
| 02:42 | Type cd incompressible; press Enter.Type cd icoFoam; press EnterType cd cylinder and press Enter. |
| 02:58 | For a Fluent mesh file, in the command terminal we need to typefluentMeshToFoam note that (MTF) are capital here (space) cylmesh.mshand press Enter |
| 03:20 | On the terminal you will see that the mesh file is converted to openfoam data file |
| 03:28 | Now go back to the cylinder folder |
| 03:31 | The constant folder has been generated.Click on the constant folder to open it. |
| 03:38 | Transport Property file is missing from the constant folder |
| 03:42 | Go two levels back and copy the transport property from the constant folder of the cavity case. |
| 03:53 | Paste this inside the constant folder of cylinder which we created just now.We will keep the default viscosity. |
| 04:05 | Switch back to the terminal. |
| 04:08 | Note that we do not run blockMesh command here.To view the boundary conditions in the mesh file |
| 04:15 | Go to Constant > polyMesh.Type ls.You will see the boundary file. |
| 04:25 | Open it in any editor of your choice. |
| 04:30 | The boundary condition names are as seen in the geometry slide. |
| 04:36 | In case of any error with the boundary names, you can refer the boundary fileclose this. |
| 04:45 | In the terminal, go two levels back and go to the 0 folder. |
| 04:52 | Open the pressure file in the 0 folder. |
| 04:57 | Note that the boundary names should exactly match with the boundary file.Change them if needed.Close this file. |
| 05:08 | Go one level back and go to the system folder. |
| 05:15 | Open the controlDict file. |
| 05:18 | We will change the end time of controlDict file.Close this. |
| 05:25 | Go one level back.To start the iterations', type icoFoam and press EnterIterations running will be seen in the terminal. |
| 05:39 | To view the geometry, type paraFoam and press Enter.In the ParaView window, click on the Apply button in the object inspector menu. |
| 05:53 | You can see the geometry.In the Active variable control menu, change from solid color to U velocity |
| 06:03 | The initial velocity condition is seen here. |
| 06:08 | Click on the play button in the VCR menu on the top right-hand side. |
| 06:15 | We can see the velocity contours with the passage of time. |
| 06:20 | Close the paraview window. |
| 06:23 | Here is a list of command to import geometry from other meshing software.
This brings us to the end of the tutorial. |
| 06:54 | As an assignment
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| 07:12 | In this tutorial we learnt :
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| 07:18 | 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 |
| 07:30 | 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 |
| 07:46 | 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.This project is coordinated by http://spoken-tutorialMore information on the same is available at the following URL linkhttp://spoken-tutorial.org/NMEICT-Intro |
| 08:03 | This is Rahul Joshi from IIT BOMBAY signing off.Thanks for joining |
