|September 22, 2010, 22:55||
sHM works without snapEdge!
Join Date: Mar 2009
Location: Montréal, Canada
Posts: 113Rep Power: 8
All you have to do is set maxConcave to a really small value. At least it seems to be the answer for getting a snappyHexMesh mesh without jagged/ragged edges on a rectangular geometry, without having to resort to snapeEdge.
Having spent some time looking at jagged/ragged edges I noticed that they boil down to faces with relatively higher concaveness. So armed with this hunch I started lowering the concaveness parameter maxConcave and noticed that the degree of jaggedness/raggedness decreased along with it. The magic number turned out to be 1 degree or maxConcave = 1.
The case is attached with all setup files for those who want to try it. Don't forget to run blockMesh first.
Now this is not guaranteed to work for everything and still needs to be tested for other geometries, such as pyramidal shapes for instance. It also does not mean that there is no such bug in sHM since OF is supposed to allow for concave faces and sHM should just work with them. The fix for this presumed bug could however turn out to be a very low local maxConcave for faces touching the line intersection of two surfaces.
Last edited by ziad; September 23, 2010 at 11:29. Reason: added figure
|Thread||Thread Starter||Forum||Replies||Last Post|
|About OpenFOAM and concave faces or cells||mbeaudoin||OpenFOAM Mesh Utilities||2||March 29, 2015 07:53|
|Problems on Tetrahedra to Polyhedra using polyDualMesh on concave surface object||chnrdu||OpenFOAM Pre-Processing||2||July 18, 2009 12:58|
|To red lemon pls answer||K.Baker||FLUENT||0||August 2, 2007 09:41|
|Appreciate for your any answer||Klawu||FLUENT||2||January 20, 2005 07:01|
|Has anyone heard of ANSWER code?||J. Garroni||Main CFD Forum||0||September 15, 1999 09:10|