[Gmsh] Difficulties with remeshing.
Christophe Geuzaine
geuzaine at acm.caltech.edu
Sun Nov 23 07:36:00 CET 2003
Hans Minnebo wrote:
> Hello,
>
> I'm trying to mesh a 3D-geometry (a cube) with a given "characteristic
> length"-field gievn on an initial mesh.
> (cylindrical, length depending on the distance to the cylinders axis)
> using :
> -"Apply as background mesh" with the interface, or
> -the following command 'gmsh geoname.geo -bgm lengthfield.pos -3'.
>
> In both cases, the newly generated mesh does not satisfy the given
> length field : the concerned surfaces are correctly modified (in my case
> : refined), but the volumes are not. Only the (volumic) vicinity of the
> surfaces seem to be correctly changed.
>
> When I create thin layers, the surface effect gives me an almost correct
> result. So I have created a thick geometry with thin layers (very heavy).
>
> Is it possible that GMSH is not able to proceed this operation in
> specific cases (including mine)?(like attractors in 3D)
> Is there an other command that I have not found?
>
> Any suggestion is welcome.
>
Yes, I've noticed some problems with the 3D background mesh recently,
too. Could you send me your 2 example files? I will enter them in our
bug directory.
Thanks,
Christophe
--
Christophe A. Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org