Internal Patches : Which boundary conditions?
Dear all,
I have suceeded in incoportaring a fluent mesh with internal patches. Now I have to choose the boudary conditions I want at this patches but I can't figure out which one to choose. Zerogradient is not the good solution. Has anyone ever had such situation and if so what did you do? Thanks for your help! |
Hi,
I've just come across this problem also. If anyone knows of a boundary condition that causes OpenFoam to ignore the boundary (so it has no effect on the fluid flow) it would be great to hear! Cheers, Marion |
Hi,
what do you mean with "internal patches"? Is it something like a pair "wall" - "wall-shadow"? If so you can use the stitchMesh utility to make these faces internal. Regards, Stefan |
A very stupid sketch but it explains the situation very cleary :)
http://img714.imageshack.us/img714/21/sketchl.png |
Hi,
I think I understand your problem. The boundary faces should be present twice on two different patches (otherwise they would have owners and neighbours and would therefore be internal). Find the co-located patches (e.g. by checking with paraView) and use stitchMesh <internalPatch> <colocatedInternalPatch> for both internal boundaries to make all the faces internal. The entry in the boundary-file should show nFaces=0 after this. Tell me if it works Stefan |
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