Extrudemesh
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Hi,
I think there is a serious bug in extrudeMesh. Using the linearNormal model, all cells created become inside out. Extruding with negative thickness produces a valid mesh. (that ofcourse can be moved into the desired place with transformPoints, but this workaraound feels a bit awkward.) Attacheed is a test case describing this. Run the included run.sh with argument negative and positive. Cheers Niklas |
Hi Niklas,
the normal is indeed reversed. Agree it is probably not logical. I'd rather not change the behaviour in 1.5.x but will in future versions. Thanks, Mattijs |
extrudeMesh - hexa cells generated?
Dear Foamers,
I am trying to create a 2D mesh to be used in OpenFOAM with snappy. My method is the following:
Some explanatory screenshots: Result with snappy: http://picasaweb.google.com/lh/photo...eat=directlinkhttp://lh5.ggpht.com/_ATh6nWRxZGQ/Sx...800/step-1.png cellSet from the middle: http://lh4.ggpht.com/_ATh6nWRxZGQ/Sx...wWo/step-2.png new mesh from cellSet: http://lh6.ggpht.com/_ATh6nWRxZGQ/Sx...B4U/step-3.png patch to extrude (why the triangles are not visualized in paraview?): http://lh3.ggpht.com/_ATh6nWRxZGQ/Sx...GK8/step-4.png result mesh with extrudeMesh: http://lh4.ggpht.com/_ATh6nWRxZGQ/Sx...800/step-5.png the same visualized in engrid. different colors > different cell types: http://lh3.ggpht.com/_ATh6nWRxZGQ/Sx...0/engrid-0.png pyramids visualized in engrid: http://lh6.ggpht.com/_ATh6nWRxZGQ/Sx...0/engrid-3.png tetras visualized in engrid: http://lh4.ggpht.com/_ATh6nWRxZGQ/Sx...0/engrid-4.png How can I avoid pyramids/tetras? Thanks for any help! Bence http://www.cfd-online.com/home/bence/Desktop/step-1.png |
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