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[snappyHexMesh] Strange SnappyHexMesh behavior at the symmetry plane |
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#1 |
Member
Jack
Join Date: Dec 2011
Posts: 94
Rep Power: 14 ![]() |
Dear foamers,
I am using SnappyHexMesh for a relatively simple case (symmetric geometry). I found a strange behavior that sometimes the mesh spacing suddenly becomes very small at the symmetry plane, even though the geometry is very smooth there (see the attached figure). Not sure how to avoid this. Any ideas? Thanks very much in advance! BTW: I tried to mesh the whole geometry (without the symmetry plane) and this issue is gone. But I really want to save 50% of CPU time using half geometry. Best regards, Jack |
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#2 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
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Is that surface division where different patches/boundaries meet? I found that was the case for some of my meshes. That tet/wedge it adds can sometimes even cause zero area faces.
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#3 | |
Member
Jack
Join Date: Dec 2011
Posts: 94
Rep Power: 14 ![]() |
Quote:
Best, Jack |
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#4 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24 ![]() |
No, that's not what I meant.
Does your solid body contain multiple named surfaces? This feature happened to me several times on a geometry that did, and the feature was only where the two named surfaces met the symmetry plane. I resolved it by just combining the surfaces into 1. |
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#5 | |
Member
Jack
Join Date: Dec 2011
Posts: 94
Rep Power: 14 ![]() |
Quote:
Regards, Jack |
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#6 |
Member
Jack
Join Date: Dec 2011
Posts: 94
Rep Power: 14 ![]() |
Well, I tried to combine all the surfaces together and it still gave me the weird refinement at the symmetry plane....
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