[Gmsh] Volume has changed error
Christophe Geuzaine
c.geuzaine at ulg.ac.be
Wed Apr 20 19:10:03 CEST 2005
Martin Lüthi wrote:
> Hi
>
> What does this error message mean:
>
> Warning : Volume has changed (312915->137478) ?
>
> Apparently something bad happens here, but why, and how could I
> correct it? I am using gmsh in batch mode like this (geo.geo is
> attached below)
>
> gmsh geo.geo -2 -clscale 5 -o remeshed.msh
>
> If I use a different element size
>
> gmsh geo.geo -2 -clscale 6 -o remeshed.msh
> ***
>
> then a new mesh is generated. However, with -clscale 5.2 I get
>
> Info : Elimination (1 swaps)
> Info : Swapping (1 missing edges)
>
> If I use the same mesh in interactive mode with different settings for
> clscale (in the options box) weird things happen (sometimes the mesh
> is displayed rotated) or the program simply hangs.
>
When this happens with the old 2D algorithm (Isotropic), you should try
again with a smaller random perturbation factor. Otherwise use 2D
algo=Triangle. (You can change these options in
Tools->Options->Mesh->General)
Christophe
--
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org