[Gmsh] meshing rounded surfaces

[Christophe Geuzaine]

Magdalena Stolarska wrote:
> I am working on a dynamic, large-deformation, moving mesh problem.  I 
> use gmsh to generate the original mesh, and for the particular problem 
> on which I am working I have been generating hemispherical or 
> semi-ellipoidal meshes.  The problem that I am having is that near the 
> rounded surface of the mesh, the nodes of the tetrahedra mesh to be 
> nearly co-planar, and this is causing problems within a few time 
> iterations.  I realize that one way to solve the problem is to 
> periodically remesh.  However, I want to be able to do this as 
> infrequently as possible.  So, my question is:  Is there anyway to 
> control how coplanar some of the nodes in 3d tetrahedral meshes are?  

Try "Mesh->Optimize quality" (or "-optimize" on the command line).

Christophe

-- 
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org