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-   -   SnappyHexMesh - snapping the wrong elements (http://www.cfd-online.com/Forums/openfoam-meshing-snappyhexmesh/107314-snappyhexmesh-snapping-wrong-elements.html)

A.Wendy September 24, 2012 01:32

SnappyHexMesh - snapping the wrong elements
 
4 Attachment(s)
Hi,

i am having a problem with the snapping Part in snappyHexMesh.
i try to Mesh a airfoil profile. The first step of SHM works fine and i get a nice Mesh. (picture 1+2) But when it comes to the snapping part SHM snapps the wrong Elements. (pictures 3+4) Instead of meshing the upper and lower elemnts it snapps the side elements. Has anyone an idea how i can fix this Problem? I think i have to modify the tolerance part in the SHMDicts but the result does not realy change. (tried 0,05 up to 4,0)

Best wishes

Andy

Tobi September 25, 2012 03:52

Quote:

Originally Posted by A.Wendy (Post 383261)
Hi,

i am having a problem with the snapping Part in snappyHexMesh.
i try to Mesh a airfoil profile. The first step of SHM works fine and i get a nice Mesh. (picture 1+2) But when it comes to the snapping part SHM snapps the wrong Elements. (pictures 3+4) Instead of meshing the upper and lower elemnts it snapps the side elements. Has anyone an idea how i can fix this Problem? I think i have to modify the tolerance part in the SHMDicts but the result does not realy change. (tried 0,05 up to 4,0)

Best wishes

Andy

Hi,
how is your snap-output? Can you put your log-file in there? I think there is a problem with many cells and sHM collapse that again couse of bad mesh result. For that problem, its possible to scale your mesh bigger - mesh it again - rescale it down.

Tobi


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