[snappyHexMesh] Snappy : Multi-region meshing

danvica · March 28, 2012, 08:12

@aurelien

That's all ? So simple ? I thought the common surfaces between two regions need to be meshed exactly the same way (same points)... actually I thought they were the same mesh named in two different ways.

@antonessiu
I think you can try lower your refinement level requirement.
In the sHMDict I posted yesterday the setup is quite coarse...

Daniele

Aurelien Thinat · March 28, 2012, 08:30

In "wonderfull land", you should use only structured mesh (the exact same surface mesh for both fluid region and solid region) to get the best results.

But in real life since I was not able to deal with SHM, an unstructured mesh is a first solution. If you use the same cell size for both regions, you will be able to limit the error from the meshes differences.

I have already checked OpenFOAM can deal with it on a simple test case. With SHM, The only problem that could appear is from the feature edge option. Sometimes SHM is a bit crafty. But with an other mesh tool, it would be easy.

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March 28, 2012, 08:12		#61
danvica Senior Member Daniele Vicario Join Date: Mar 2009 Location: Novara, Italy Posts: 142 Rep Power: 17	@aurelien That's all ? So simple ? I thought the common surfaces between two regions need to be meshed exactly the same way (same points)... actually I thought they were the same mesh named in two different ways. @antonessiu I think you can try lower your refinement level requirement. In the sHMDict I posted yesterday the setup is quite coarse... Daniele

March 28, 2012, 08:30		#62
Aurelien Thinat Senior Member Aurelien Thinat Join Date: Jul 2010 Posts: 165 Rep Power: 16	In "wonderfull land", you should use only structured mesh (the exact same surface mesh for both fluid region and solid region) to get the best results. But in real life since I was not able to deal with SHM, an unstructured mesh is a first solution. If you use the same cell size for both regions, you will be able to limit the error from the meshes differences. I have already checked OpenFOAM can deal with it on a simple test case. With SHM, The only problem that could appear is from the feature edge option. Sometimes SHM is a bit crafty. But with an other mesh tool, it would be easy.