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Gmsh and createPatch (problem with mesh)

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Old   October 27, 2011, 08:44
Default Gmsh and createPatch (problem with mesh)
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Hi guys,

I have the following problem:
my geometry is very easy, just a plane that I created in gmsh.
The height is only one Layer (extrude... Layers{1}; Recombine.
I am using gmshToFoam and it gets translated. I have tried to use createPatch afterwards but i ve also tried it without. I am defining cyclic boundaries on 4 of the boundaries, that is i connect top to bottom and left to right.

This cyclic boundary conditions seems to make problems here. The solver runs, but i am really unhappy about the result.
I am having a situation with diffusion involved. So the red concentration diffuses into neighbour volumes.
But as you can see in the attached image (the white stuff on the top and bottom and the weird curvature of the red region on the boundaries)
there must be some kind of diffusion in areas that shouldnt be connected at all.

I am using the gmsh approach and not blockMesh because I am planning to model more complex geometries and do a field mapping afterwards.

I am happy about any suggestions

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Old   October 27, 2011, 08:59
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... or here is a more obvious image.

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Old   February 2, 2012, 15:39
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Hi I know, it is a late reply and you might have found a solution.

you need: createPatch
and a createPatchDict in your system folder.

Then it should work.
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