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[snappyHexMesh] ShM: problems at sharp edges

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Old   June 30, 2016, 10:30
Default ShM: problems at sharp edges
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Joris C.
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When using snappyHexMesh to mesh domains with sharp corners, the mesh does not resolve the edges: the mesh goes out of the domain. The direction in which it goes is not controllable, i.e. sometimes it messes up sides on which I want to apply e.g. a wedge BC, which needs a planar mesh.

An example result is in the attachment, along with a screenshot of the feature edges.

At one point I've read:

"If you have a problem with the bad cells you can change the snappyHexMesh settings to improve them at the expense of poorer surface and edge conformance." [http://bugs.openfoam.org/view.php?id=2099]

but I don't know why..

I've tried OFv3+ for this feature:
  • snappyHexMesh now optionally splits boundary faces for improved conformance to surface features more...
but it doesn't help..


Any ideas how to fix this?
Attached Images
File Type: png Mesh.png (27.5 KB, 59 views)
File Type: png Feature_edges.png (4.3 KB, 26 views)
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Old   July 11, 2016, 22:23
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Can you post your mesh dictionary?
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