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

Simone GREMMO [531257] Simone.GREMMO at umons.ac.be
Fri Apr 17 12:05:59 CEST 2015

Hi Andrea,
If you try to create a 2D mesh and you look in detail on the top (and bottom as well) face of your model you can see some cavities appearing close to the circle boundary. Is this an expected behaviour? Maybe you selected the wrong "lines" when creating the Line Loop to define your plane surfaces. 
I attach an image to try to clarify what these "cavities" are.

I hope this will help.

-----Original Message-----
From: Sacconi, Andrea [mailto:a.sacconi11 at imperial.ac.uk] 
Sent: vendredi 17 avril 2015 00:14
To: gmsh at geuz.org
Subject: [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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