[Gmsh] Re: gmesh manual

[Christophe Geuzaine]

Alper Corlu wrote:
> 
> Hi
> 
> I am Alper Corlu. I am a physics Phd student at university of
> Pennsylvania. I am currently working on finite element method and the code
> I have is using your Gmesh program. We are trying to understand the
> program and asking you if there is a manual for the program? The tutorial
> is fine but we cant find answers to all the questions in tutorial like
> characteristic length, how to set it, how to use it ..etc.

Unfortunately, there is no complete manual for Gmsh at the moment. But
don't hesitate to send specific questions to the mailing list
(mailto:gmsh at geuz.org). As for the characteristic lengths, there are
three main possibilities:

1) Specify a target mesh size as the fourth coordinate of the geometry
points. These mesh sizes will be linearly interpolated in the structure
to produce the actual mesh sizes at each point in the volume.

2) Use attractors with the anisotropic mesh generator (see
tutorial/t7.geo).

3) Define a real background mesh, from which the actual mesh sizes will
be interpolated. Try for example 'gmsh tutorial/t1 -bgm
tutorial/bgmesh.pos -2'.

Christophe

-- 
Christophe Geuzaine

Tel: 32 (0) 4 366 37 10    http://geuz.org
Fax: 32 (0) 4 366 29 10    mailto:Christophe.Geuzaine at ulg.ac.be