[Gmsh] Slivers generated by GMSH

[Christophe Geuzaine]

> On 3 Mar 2020, at 07:37, Grunwald, Christoph <Christoph.Grunwald at emi.fraunhofer.de> wrote:
> 
> Dear all,
>  
> I try to mesh a volume filled with spheres. The meshing works – however, GMSH creates some very flat tetraeder (sliver). Since I need the mesh for a structural analysis with explicit time integration, these elements boild down the whole simulation and finally kill the simulation. Are there any hints, how to get rid of these elements?
> The file is attached, I am working with the development snapshot of GMSH from 01-27-2020.
>  

I get this with Gmsh 2.5.4 :

Gamma = 0.01568,  0.8118, 0.9999 (min, avg, max) (radius inscribed/circumscribed)
minJ =  0.00858,     1.07,      5.7 (min, avg, max) (jacobian)
ICN =    0.170,    0.845,    1.000 (worst, avg, best) (inverse cond. number)

which looks ok (no slivers).

Christophe

> Thank you very much,
> Kind regards,
> Christoph Grunwald
> --
> Dipl-Ing. (FH) Christoph Grunwald
> CAE-Engineer, Structural Dynamics, Safety Technology and Protective Structures
> Fraunhofer Institut for High-Speed Dynamics, Ernst-Mach-Institut, EMI
> Am Klingelberg 1 | D-79588 Efringen-Kirchen
> Fon +49 7628 9050 630 | Fax -677
> Christoph.grunwald at emi.fraunhofer.de
>  
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine