[Gmsh] Extrusion and Standard Volume together do not mesh

[Wladimyr Mattos C. Dourado]

Hi Christophe

Tank you very much for your fast answer. Really you
and your colaborators produced a very nice utility.
It's a reference for our comunity.

You advice is very well. I couldn't imagine that the
problem is the fact that the piramid creation is
unavailable. I alread had tested the extrusion for all
domain before put that question, but if I use it I
will  lost the main feature of unstructured mesh for
us, CFD comunity: to avoid generate node/elements in
regions where they are unecessary.

Anyway, many tanks for your attention and help, and
congratulations for your effort!

Wladimyr Mattos Dourado





--- Christophe Geuzaine <geuzaine at acm.caltech.edu>
wrote:
> Wladimyr Mattos C. Dourado wrote:
> > Hi Guys
> > 
> > What can I say about after three years using gmsh?
> It's really a very
> > nice code! Then I send congratulations once more
> for all developer team!
> > I have three students which are working with gmsh
> and AOMD to develop a
> > new thing. I hope early we will give a good
> contribution for the
> > gmsh-AOMD community.
> > 
> > Now I have a problem. I attached a .geo file which
> is a 3D mesh
> > generated around a wing which profile is given by
> many points. I
> > extruded the mesh near the body to generate a nice
> mesh for boundary
> > layer, and I created a standard volume to be mesh
> with tetrahedra
> > outside this regions as you can see. But: Huston,
> We have a problem!
> > When I put gmsh to generate the 3D mesh, only the
> mesh from extrusion is
> > performed. I can't see any volume outside the
> extrusion region. If I
> > create the outside volume first, the mesh
> generator crashes.  Before I
> > tried to generate the outside volume by extrusion
> whitout success, too
> > :-( Could somebody help me to solve this problem?
> 
> Hi Wladimyr - In "wing.geo" you recombine the
> extruded mesh, so there
> are quads on the boundary--and Gmsh's unstructured
> algorithm only
> generates tetrahedra (the algorithm should create
> pyramids at the
> interface but that's not implemented).
> 
> One solution is to remove the "Recombine" commands,
> so that you have
> triangles/tetrahedra everywhere. A better solution
> is probably to just
> extrude everything (this works nicely: cf. attached
> file "wingex.geo").
> 
> Christophe
> 
> -- 
> Christophe Geuzaine
> Applied and Computational Mathematics, Caltech
> geuzaine at acm.caltech.edu - http://geuz.org
> > _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh
> 


	
	
		
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