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SnappyHexMesh - snapping the wrong elements

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Old   September 24, 2012, 01:32
Question SnappyHexMesh - snapping the wrong elements
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Andreas Wendy
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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
Attached Images
File Type: jpg snap01.jpg (83.5 KB, 16 views)
File Type: jpg snap02.jpg (80.8 KB, 19 views)
File Type: jpg snap03.jpg (86.3 KB, 19 views)
File Type: jpg snap04.jpg (78.7 KB, 22 views)
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Old   September 25, 2012, 03:52
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Tobias Holzmann
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Quote:
Originally Posted by A.Wendy View Post
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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