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split a patch face on subfaces?

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Old   April 14, 2014, 19:39
Question split a patch face on subfaces?
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Luis Felipe Gutierrez Marcantoni
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Hi, I'm trying to make a mesh with blockMesh, but i'm in troubles because I need to split a face in two faces to impose different boundary conditions, My question is: is possible split a block face (patch) on sub-faces without create other block?. To clarify my question, in next fig I show the mesh made with one hex block (2 cells in x and 2 cells in y), in this fig is labeled the patch (right wall) that I can split to define a new patch, my question, Is possible to define a new patch without make other block (see fig2) ?

Thanks in advance for any hint.

Felipe G
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Old   April 19, 2014, 11:14
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Bruno Santos
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Greetings Felipe,

Do you only want to split the face? Because if you only split the face, you will have a cell with more than one boundary condition on the same side of the cell, which can lead to considerable simulation problems.

If this is what you want, you could try using modifyMesh. The location of an example dictionary is indicated by this command:
echo $FOAM_UTILITIES/mesh/advanced/modifyMesh/modifyMeshDict
Problem is that you would have to split the edges and then assign a patch name to the faces in question.

Have a look into the wiki page for more ideas, since interactively designing the dictionary might be easier:

Best regards,
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