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[snappyHexMesh] Problem with prism layers at corner edges

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Old   September 12, 2016, 12:37
Default Problem with prism layers at corner edges
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Paul Palladium
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Dear Foamers,

I would like to know what is the wrong with my SHM's settings. I am doing a wind loading simulation (16 M Cells) and my prism layers are really bad at corner edges. You can see this on the picture attached to my message.

The prism generation crash at corner edges even if I have (I guess) a correct setting on SHM :

Quote:
// When not to extrude surface. 0 is flat surface, 90 is when two faces
// are perpendicular
featureAngle 180;

// At non-patched sides allow mesh to slip if extrusion direction makes
// angle larger than slipFeatureAngle.
slipFeatureAngle 75;
Generally "an optimum value of 180 or higher is recommended to grow layers at corner edges" according to https://www.simscale.com/docs/conten...dSettings.html

Could you help me ? What did I do wrong ?

Thanks a lot,

Regards

EDIT : 16/09/2016 :
This post could be helpful : http://www.cfd-online.com/Forums/ope...r-corners.html
It seems that featureAngle 180 is not the best setting to grow layers at corner edges. featureAngle 60 could be better...


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File Type: jpg Yplus_and_mesh.jpg (199.8 KB, 85 views)

Last edited by Fauster; September 15, 2016 at 04:26.
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Old   September 30, 2016, 01:25
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Your edges are very jagged. Did you use surfaceFeatureExtract?
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