[Gmsh] Surface does not remesh as fine as volume

[Christophe Geuzaine]

> On 7 Oct 2020, at 21:58, Lisa Pankewitz <lisa at simula.no> wrote:
> 
> To whom it may concern,
> 
> first of all - thanks for providing this incredible software and report! It is really appreciated.
> 
> I am using a geometry I used for several samples, but for this one I cannot figure out why the surface is not remeshing in the same way the volume is.
> I attached a minimal example of the .geo and one .vtk. I am working with gmsh 4.6.1.
> 
> I would really appreciate it if you have a hint of what I am missing.

The surface is just not remeshed at all (cf. the error message "Error : Invalid exterior boundary mesh for parametrization") - hence Gmsh tries to produce a (refined) volume mesh that conforms to the (coarse) surface mesh.

The issue with the input surface mesh seems to be related to the orientation of input triangles (which are sometimes flipped). See the attached picture.

Christophe


> Thank you for your time and have a fantastic day!
> 
> Kind regards,
> 
> Lisa 
> 
> ----------------------------------------------------------------------------------------------------------------------
> Lisa Pankewitz
> PhD student
> Simula Research Laboratory
> Martin Linges vei 25
> 1364 Fornebu
> Office 329
> lisa at simula.no
> 
> <new_attempt.vtk><example.geo>_______________________________________________
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine



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