[Gmsh] Negative Jacobians in 2nd Order Mesh

[Nikhil Vaidya]

I changed my geometry slightly, and the negative jacobians problem has
returned. Is there some general second-order meshing workflow (involving
smoothing steps) one can follow to avoid this problem?

Best,
Nikhil

On Sat, Sep 5, 2020 at 7:32 AM Stephen Wornom <stephen.wornom at inria.fr>
wrote:

>
> Hello
> Please let the list know if
> > Try the high-order mesh optimizer: "-optimize_ho" on the command line.
> fixed the problem,
> Stephen
>
>
>
> ----- Original Message -----
> > From: "Christophe Geuzaine" <cgeuzaine at uliege.be>
> > To: "Nikhil Vaidya" <nikhilvaidya91 at gmail.com>
> > Cc: "gmsh" <gmsh at onelab.info>
> > Sent: Friday, September 4, 2020 2:19:36 PM
> > Subject: Re: [Gmsh] Negative Jacobians in 2nd Order Mesh
>
> >> On 4 Sep 2020, at 13:49, Nikhil Vaidya <nikhilvaidya91 at gmail.com>
> wrote:
> >>
> >> Hello,
> >>
> >> I have a geometry for which 1st order tetrahedral meshing works fine
> (with no
> >> negative jacobians). For the 2nd order case, I get a few negative
> jacobians.
> >> This problem does not go away even when I try to regularize the mesh or
> reduce
> >> mesh sizes in certain regions with small geometric features.
> >>
> >> Does someone have a suggestion?
> >
> Hello
> >
> > Christophe
> >
> >>
> >> Best regards,
> >> Nikhil
> >> _______________________________________________
> >> gmsh mailing list
> >> gmsh at onelab.info
> >> http://onelab.info/mailman/listinfo/gmsh
> >
> > —
> > Prof. Christophe Geuzaine
> > University of Liege, Electrical Engineering and Computer Science
> > http://www.montefiore.ulg.ac.be/~geuzaine
> >
> >
> >
> >
> > _______________________________________________
> > gmsh mailing list
> > gmsh at onelab.info
> > http://onelab.info/mailman/listinfo/gmsh
>
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