OpenFOAM/C3/Exporting-geometry-from-Salome-to-OpenFOAM/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Hello and welcome to the spoken tutorial on Exporting the geometry from Salome to OpenFOAM. |
| 00:09 | In this tutorial, we will see : To group the meshed geometry parts in Salome
To export the geometry to OpenFOAM. To create a case directory for simulation and To view the geometry in ParaView. |
| 00:26 | To record this tutorial, I am using: Linux operating system, Ubuntu version 12.10 OpenFOAM version 2.1.1 ParaView version 3.12.0
Salome version 6.6.0 |
| 00:41 | To practice this tutorial, the learner should first perform the tutorial on Creating and meshing a Curved-Pipe Geometry in Salome. |
| 00:52 | Open Salome as shown in the previous tutorial. Go to file >> Open. Go to Desktop. Click on Curved-geometry.hdf. |
| 01:04 | Press Open. Go to mesh-module from Modules drop-down option. |
| 01:12 | Open the 'Mesh' tree from the object Browser. |
| 01:17 | Right-click on Mesh_1. Click on Show. We see the mesh on the geometry is visible. |
| 01:28 | Let me close the python console window. |
| 01:32 | Now, we have to name the meshed geometry parts as we require it in OpenFOAM. |
| 01:39 | To create Groups on this mesh, right-click on Mesh_1 and click on Create Group. |
| 01:48 | Select the Element Type as Face. Select the Group type as Group on Geometry. |
| 01:57 | Click on the button in front of Geometrical Object and select Direct Geometrical Selection. |
| 02:07 | Open the 'Geometry' tree in the Object Browser. Open the pipe_1 tree and select the inlet group in the geometry tree that we had created in the previous tutorial. |
| 02:22 | You can select the color as red. |
| 02:26 | Name the group as inlet. Click on Apply and close. inlet group is seen in the tree. |
| 02:37 | Similarly, create the outlet group. I have created the outlet group. |
| 02:44 | Now, to create the group of the whole outer surface, right-click on mesh_1 >> Create group . |
| 02:53 | Select the Element Type as Face and the Group Type as Group on filter. |
| 03:00 | Click on Set filter. Click on the Add button. In the drop-down option below Criterion menu, select Free Faces. Click on Apply and Close. |
| 03:17 | You can change the color to blue. |
| 03:23 | Again click on Apply and Close. Group_1 has been created. |
| 03:31 | Now, in the mesh menu at the top, click on Cut groups. Select the Main object as Group_1. Select the Tool object as inlet. |
| 03:45 | Hold the shift key on your keyboard and also select the Tool object as outlet. |
| 03:54 | Type the Result name as walls. |
| 03:58 | You can select the color as purple. click on Apply and Close. We see walls group has been created. |
| 04:10 | Right-click on Group_1 and delete this group as we do not want to see it in OpenFOAM. |
| 04:20 | Save the work by clicking on save document option. |
| 04:24 | Now, right-click on mesh_1. Go to Export >> Unv File. |
| 04:33 | Name the file as bentpipe. I am saving this file on the Desktop. Close Salome. We see bentpipe.unv file on the desktop. |
| 04:50 | Create a folder named "bentpipe" on the desktop. |
| 04:55 | Now, move "bentpipe.unv" file to this folder. |
| 05:01 | To perform simulation on this geometry in OpenFOAM using icoFoam solver, go to the icoFoam folder in OpenFOAM. |
| 05:10 | For the location of this folder, go to the tutorial on lid driven cavity. |
| 05:15 | Copy and Paste the "bentpipe" folder on the desktop, in this icoFoam folder. |
| 05:22 | Also, copy the system folder from the cavity folder to this bentpipe folder. |
| 05:32 | Now, go inside this bentpipe folder throgh command terminal. I am inside the bentpipe folder. |
| 05:41 | Type "ls" and press Enter. We see the systemfolder and the bentpipe.unv file. |
| 05:49 | Now, type: ideasUnvToFoam space bentpipe dot unv. Note that U, T and F are capital. Press Enter. |
| 06:11 | Now, type "ls". We see constant folder has been created. Type cd (space) Constant. |
| 06:23 | Type cd (space) polyMesh. Type "ls". Press Enter. |
| 06:31 | We see geometry files have been created. Come out of the polyMesh folder. |
| 06:38 | Come out of the constant folder. |
| 06:42 | Now, to convert the geometry scale to centimeters, type: transformPoints (space) -scale space '(0.01 space 0.01 space 0.01)' and press Enter. The Geometry has been converted to centimeters. |
| 07:17 | Minimize the terminal. Go inside the bentpipe folder. |
| 07:23 | Go inside the constant folder. We see that the transportProperties file is not there. |
| 07:30 | Copy the transportProperties file from the cavity folder and save it inside the constant folder. |
| 07:37 | I have copied the transport Properties file. Now, come out of the constant folder. |
| 07:44 | We need the 0 (zero) folder having 'P' and 'U' files.Copy the '0 '(zero) folder from the cavity folder. |
| 07:55 | I have copied the'0' (zero) folder. Go inside the '0' (zero) folder. |
| 08:02 | Open the 'p' file. Make sure that you give boundary patches for inlet, outlet and walls as we had created in Salome. |
| 08:15 | Erase movingWall and type "inlet". Erase fixedWalls and type "outlet". |
| 08:25 | Erase frontAndBack and type "walls". Save the file and Close the file. |
| 08:34 | Similarly, make changes in 'U' file. For appropriate boundary conditions, you can refer to the tutorial on Hagen-Poiseuille flow. |
| 08:46 | I have made the changes and given the appropriate boundary conditions. |
| 08:51 | You may also make the changes in transportProperties and ControlDict files by referring to the tutorial on Hagen-Poiseuille flow. |
| 09:00 | Let's close the Home folder. |
| 09:03 | Now, go to terminal. Type paraFoam. This will open ParaView. Click on Apply in the Object Inspector menu. |
| 09:16 | In the drop-down menu. click on Surface with Edges. Let's have a closer look by zooming in. |
| 09:28 | We see hexahedral mesh. We also see the groups have been created as we had named it in Salome- Inlet outlet and walls. |
| 09:38 | Volume inside the surface is automatically grouped as internal mesh.
In this tutorial, we have learned: How to group the meshed geometry parts in Salome How to export the geometry to OpenFOAM. How to create a case directory for simulation And, to view the geometry in ParaView. |
| 10:00 | For Assignment,Run the simulation by making appropriate changes in the files as described.
Export the geometries that you have created on your own. And, run the simulations on those geometries. |
| 10:14 | The video is available at the following 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. |
| 10:24 | 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 |
| 10:40 | 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: http://spoken-tutorial.org/NMEICT-Intro |
| 10:58 | I am Saurabh Sawant, from IIT Bombay. Thank you. |
