[Gmsh] How to control the quality of 3D tetrahedral mesh during creation ?

[Prithivirajan V]

Hello,

I have attached the STL files. Kindly take a took.

Thanks,
Prithivi

On Thu, Dec 27, 2018 at 2:43 PM Christophe Geuzaine <cgeuzaine at uliege.be>
wrote:

>
> Can you share the STL? Maybe the quality is constrained by the quality of
> the input triangles.
>
> Christophe
>
> > On 21 Dec 2018, at 03:30, Prithivirajan V <prithivi.purdue at gmail.com>
> wrote:
> >
> > Dear Gmsh users,
> >
> > I am using Gmsh to convert a bunch of .STL files to a 3D volume mesh (
> tetrahedral) using the following set of 4 commands.
> >
> > ###############################
> > 1.  Merge command for all the stl files I have ( showing just one below)
> >
> > Merge "Path\Grain_1.stl";
> > Surface Loop(1)={1};
> > Volume(1)={1};
> > Physical Volume (1)={1};
> >
> > 2.  Path\gmsh.exe -3 -order 1 optimize out_temp.geo > meshing.log
> > (out_temp.geo contains the merge command and others for all stl files as
> shown in 1)
> >
> > 3. Path\gmsh.exe -0 -o out_temp.msh out.geo >> meshing.log
> >
> > 4. Path\gmsh.exe out_temp.msh -0 -o ABAQUS.inp
> > ###################################
> >
> > The issue is that I am getting 3 % bad elements in my volume mesh. I am
> using the mesh qiality metric defined by circumsphere radius / insphere
> radius.
> >
> > How do I improve the quality of my final 3D volume mesh ? Could anyone
> offer your advise in this ?
> >
> > -Prithivi
> > _______________________________________________
> > 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
>
> Free software: http://gmsh.info | http://getdp.info | http://onelab.info
>
>
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