Difference between revisions of "OpenFOAM/C3/Importing-mesh-file-in-OpenFOAM/English-timed"

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|-
 
|-
 
|03:20
 
|03:20
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|On the terminal you will see that the '''mesh file''' is converted to '''openfoam data file'''
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|On the terminal, you will see that the '''mesh''' file is now converted to '''openFoam data file'''.
  
 
|-
 
|-
 
|03:28
 
|03:28
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|Now go back to the '''cylinder''' folder
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|Now, go back to the '''cylinder''' folder.
  
 
|-
 
|-
 
|03:31
 
|03:31
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|The '''constant''' folder has been generated.Click on the '''constant''' folder to open it.
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|The '''constant''' folder has been generated. Click on the '''constant''' folder to open it.
  
 
|-
 
|-
 
|03:38
 
|03:38
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|'''Transport Property''' file is missing from the '''constant''' folder
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|'''transport Property''' file is missing from the '''constant''' folder.
  
 
|-
 
|-
 
|03:42
 
|03:42
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|Go two levels back and copy the '''transport property''' from the '''constant folder''' of the '''cavity case'''.
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|Go two levels back and copy the '''transport property''' from the '''constant''' folder of the '''cavity case'''.
  
 
|-
 
|-
 
|03:53
 
|03:53
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|Paste this inside the '''constant''' folder of '''cylinder''' which we created just now.We will keep the default '''viscosity'''.
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|'''Paste''' this inside the '''constant''' folder of '''cylinder''' which we created just now. We will keep the default '''viscosity'''.
  
 
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|04:08
 
|04:08
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|'''Note that''' we do not run '''blockMesh''' command here.To view the '''boundary conditions''' in the '''mesh''' file
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|Note that we do not run '''blockMesh''' command here. To view the '''boundary conditions''' in the '''mesh''' file,
  
 
|-
 
|-
 
|04:15
 
|04:15
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|Go to '''Constant > polyMesh'''.Type '''ls'''.You will see the '''boundary''' file.
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|go to '''Constant > polyMesh'''. Type "ls". You will see the '''boundary''' file.
  
 
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|04:36
 
|04:36
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|In case of any error with the '''boundary names''', you can refer the '''boundary file'''close this.
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|In case of any error with the '''boundary names''', you can refer the '''boundary file'''. Close this.
  
 
|-
 
|-
 
|04:45
 
|04:45
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|In the '''terminal''', go two levels back and go to the '''0''' folder.
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|In the terminal, go two levels back and go to the '0' (zero) folder.
  
 
|-
 
|-
 
|04:52
 
|04:52
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|Open the '''pressure file''' in the '''0 folder'''.
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|Open the '''pressure''' file in the '0' (zero) folder.
  
 
|-
 
|-
 
|04:57
 
|04:57
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|Note that the '''boundary''' names should exactly match with the '''boundary file'''.Change them if needed.Close this file.
+
|Note that the '''boundary''' names should exactly match with the '''boundary''' file. Change them if needed. Close this file.
  
 
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|05:18
 
|05:18
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|We will change the end time of '''controlDict''' file.Close this.
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|We will change the end time of the '''controlDict''' file. Close this.
  
 
|-
 
|-
 
|05:25
 
|05:25
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|Go one level back.To start the '''iterations''', type '''icoFoam''' and press '''Enter'''''Iterations''' running will be seen in the '''terminal'''.
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|Go one level back. To start the '''iterations''', type "icoFoam" and press '''Enter'''. Iterations running will be seen in the terminal.
  
 
|-
 
|-
 
|05:39
 
|05:39
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|To view the '''geometry''', type '''paraFoam''' and press '''Enter'''.In the '''ParaView window''', click on the '''Apply''' button in the '''object inspector''' menu.
+
|To view the '''geometry''', type '''paraFoam''' and press '''Enter'''. In the '''ParaView''' window, click on the '''Apply''' button in the '''object inspector''' menu.
  
 
|-
 
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|05:53
 
|05:53
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|You can see the '''geometry'''.In the '''Active variable control''' menu, change from '''solid color''' to '''U velocity'''
+
|You can see the '''geometry'''. In the '''Active variable control''' menu, change from '''solid color''' to ''''U' velocity'''.
  
 
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|06:08
 
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|Click on the '''play''' button in the '''VCR menu''' on the top right-hand side.
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|Click on the '''play''' button in the '''VCR menu''', on the top right-hand side.
  
 
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|06:23
 
|06:23
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|Here is a list of command to''' import geometry''' from other '''meshing software'''.
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|Here is a list of commands to''' import geometry''' from other '''meshing software'''.
−
* '''ANSYS : ansysMeshToFoam space <filename>'''
+
* '''ANSYS : ansysToFoam space <filename>'''
−
*'''IDEAS : ideasTofoam space <filename>'''
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* '''IDEAS : ideasTofoam space <filename>'''
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*'''CFX : cfxToFoam space <filename>'''
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* '''CFX : cfxToFoam space <filename>'''
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*'''SALOME : ideasUnvToFoam space <filename>'''
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* '''SALOME : ideasUnvToFoam space <filename>'''
  
 
This brings us to the end of the tutorial.
 
This brings us to the end of the tutorial.
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|-
 
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|06:54
 
|06:54
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|As an '''assignment'''
+
|As an assignment-
−
* Try importing the '''mesh''' file of circular cylinder.
+
* Try importing the '''mesh''' file of a circular cylinder.
 
* '''Mesh''' file by the name '''circcyl.msh'''is provided with this tutorial.
 
* '''Mesh''' file by the name '''circcyl.msh'''is provided with this tutorial.
−
* Solve it using the '''icoFoam solver'''.
+
Solve it using the ''''icoFoam' solver'''.
  
 
|-
 
|-
 
|07:12
 
|07:12
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|In this tutorial we learnt :
+
|In this tutorial, we learnt importing geometry from other '''meshing''' softwares.
−
*Importing geometry from other '''meshing''' software.
+
  
 
|-
 
|-
 
|07:18
 
|07:18
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|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
+
|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
 
|07:30
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|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
+
|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
 
|07:46
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|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
+
|'''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 the following URL:
 +
http://spoken-tutorial.org/NMEICT-Intro
  
 
|-
 
|-
 
|08:03
 
|08:03
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|This is Rahul Joshi from IIT BOMBAY signing off.Thanks for joining
+
|This is Rahul Joshi from '''IIT Bombay''', signing off. Thanks for joining.
  
 
|-
 
|-
 
|}
 
|}

Revision as of 15:17, 5 July 2016

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:

Import Mesh files from a meshing software in OpenFOAM.

00:14 To record this tutorial, I am using:
  • Linux Operating system Ubuntu version 12.04
  • OpenFOAM version 2.1.1
  • ParaView version 3.12.0
00:26 As a prerequisite, the user should know how to generate a Mesh in softwares like -

Gambit, Ansys ICEM , CFX, Salome etc.

00:40 Using blockMesh, we can easily make simple geometries. For example- box, pipe etc.

It is difficult to create complex geometries using blockMesh.

00:53 But OpenFOAM supports importing mesh from third party meshing software.

There are commands available in OpenFOAM to import these mesh files.

01:05 We will now learn to import these files.
01:08 Here is the geometry of our case.

We have a square cylinder:

  • length 1m and height 1m.
  • Inlet velocity is 1 m/s.
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' (zero0 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 space tutorials; press Enter.
02:42 Type: cd space incompressible and press Enter. Type cd space icoFoam; press Enter. Type cd space cylinder and press Enter.
02:58 For a Fluent mesh file, in the command terminal, we need to type "fluentMeshToFoam" (Note that M, T, F are capital here) (space) "cylmesh.msh" and press Enter.
03:20 On the terminal, you will see that the mesh file is now 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 file. Close this.
04:45 In the terminal, go two levels back and go to the '0' (zero) folder.
04:52 Open the pressure file in the '0' (zero) 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 the controlDict file. Close this.
05:25 Go one level back. To start the iterations, type "icoFoam" and press Enter. Iterations 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 commands to import geometry from other meshing software.
  • ANSYS : ansysToFoam space <filename>
  • IDEAS : ideasTofoam space <filename>
  • CFX : cfxToFoam space <filename>
  • SALOME : ideasUnvToFoam space <filename>

This brings us to the end of the tutorial.

06:54 As an assignment-
  • Try importing the mesh file of a circular cylinder.
  • Mesh file by the name circcyl.mshis provided with this tutorial.

Solve it using the 'icoFoam' solver.

07:12 In this tutorial, we learnt importing geometry from other meshing softwares.
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 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 the following URL:

http://spoken-tutorial.org/NMEICT-Intro

08:03 This is Rahul Joshi from IIT Bombay, signing off. Thanks for joining.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14

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