[Gmsh] Correct .geo file ... but self-intersections in surfaces for 3D mesh ?!?

Zenker, Dr. Matthias Matthias.Zenker at erbe-med.com
Fri Apr 17 09:06:11 CEST 2015


Hi,

I get a crash when I try to 3D-mesh your geometry (gmsh 2.8.5, Windoze 7). So I cannot really see what happens. Before doing the 3D mesh, you could have a look at the 2D mesh to see if it corresponds to what you expect. If 3D meshing fails, gmsh normally creates a file with intersections (intersect.pos if I remember correctly), which you can merge to your geometry to see where the self-intersections are.

HTH,

Matthias


> -----Ursprüngliche Nachricht-----
> Von: Sacconi, Andrea [mailto:a.sacconi11 at imperial.ac.uk]
> Gesendet: Freitag, 17. April 2015 00:14
> An: gmsh at geuz.org
> Betreff: [Gmsh] Correct .geo file ... but self-intersections in surfaces for 3D
> mesh ?!?
>
> Hi GMSH users,
>
> I have a problem with a .geo file (which is attached). The geometry is
> composed of a parallelepiped without a cylinder. As you can see, the cylinder
> is represented by small triangular faces, since they are the results of finite
> element calculations, during which the cylinder moves in time.
> I can read the file without problem, but when I generate the 3D mesh, it
> keeps telling me that there are self-intersections in the surface mesh ... How
> come? All the surfaces are enumerated only once.
> Could someone have a look at my file? I would really appreciate it!
>
> Thanks in advance and congratulations for the amazing mesh generator :)
> Andrea
> __________________________________________________________
>
> Andrea Sacconi
> PhD student, Applied Mathematics
> AMMP Section, Department of Mathematics, Imperial College London,
> London SW7 2AZ, UK a.sacconi11 at imperial.ac.uk


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