> On 23 Nov 2020, at 11:19, Nikhil Vaidya <nikhilvaidy...@gmail.com> wrote: > > 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?
"-optimize_ho" applies the default strategy (elastic smoothing followed by brute-force optimization). See all the "HighOrder" options to fine-tune the parameters. With the API you can also call all the steps individually. Christophe > > Best, > Nikhil > > On Sat, Sep 5, 2020 at 7:32 AM Stephen Wornom <stephen.wor...@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" <cgeuza...@uliege.be> > > To: "Nikhil Vaidya" <nikhilvaidy...@gmail.com> > > Cc: "gmsh" <gmsh@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 <nikhilvaidy...@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@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@onelab.info > > http://onelab.info/mailman/listinfo/gmsh > _______________________________________________ > gmsh mailing list > gmsh@onelab.info > http://onelab.info/mailman/listinfo/gmsh — Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://people.montefiore.ulg.ac.be/geuzaine _______________________________________________ gmsh mailing list gmsh@onelab.info http://onelab.info/mailman/listinfo/gmsh
