[Gmsh] mesh problem on a cylinder

Christophe Geuzaine cgeuzaine at ulg.ac.be
Mon May 11 10:54:49 CEST 2009


Teresa Pinheiro wrote:
> Thank you very much for your quick solution of the problem!
> 
> Now it is possible to obtain a 3D mesh of the reported structures. 
> Indeed, I have been able to obtain only a very dense 3D mesh, 
> considering a very small element size factor. In case a not so small 
> value of this parameter is considered, it's possible to obtain a 2D 
> mesh, but not a 3D mesh. Is this a requirement for the 3D mesh in this 

That's strange: over here all mesh sizes work, e.g.

gmsh cylinder.brep -clscale 5 -3
gmsh cylinder.brep -clscale 10 -3
gmsh cylinder.brep -clscale 50 -3
gmsh cylinder.brep -clscale 100 -3


> kind of structures or would there be any other alternative in order to 
> get a not so dense mesh?
> 
> Again, thank you for your help!
> 
> Teresa
> 
> On Sat, May 9, 2009 at 9:30 AM, Christophe Geuzaine <cgeuzaine at ulg.ac.be 
> <mailto:cgeuzaine at ulg.ac.be>> wrote:
> 
>     Teresa Pinheiro wrote:
> 
>         Hello to everybody!
> 
>         I have found two simple examples with cylindric symmetry, where
>         the mesh module of gmsh doesn't perform a 3D mesh. I have tried
>         with different meshing algorithms and changing the element size
>         factor, but I haven't been able to obtain a 3D mesh.
> 
> 
>     Hi Teresa - this should be fixed in tomorrow's nightly snapshot: there
>     was a small tolerance issue in the mesh algorithm for periodic surfaces.
> 
>     Thanks for the bug report!
> 
>     Christophe
> 
> 
>         See the brep files, where the geometry is kept and the output
>         files, where the outgoing info is saved.
> 
>         Thanks!
> 
> 
>         Teresa
> 
> 
> 
>         ------------------------------------------------------------------------
> 
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> 
> 
> 
>     -- 
>     Prof. Christophe Geuzaine
>     University of Liege, Electrical Engineering and Computer Science
>     http://www.montefiore.ulg.ac.be/~geuzaine
>     <http://www.montefiore.ulg.ac.be/%7Egeuzaine>
> 
> 
> 


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine



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