[Gmsh] create partitions

[Christophe Geuzaine]

david free wrote:
> Hello,
> I discovered gmsh and tried to make use it for my students and collegues 
> since two years. I'm using gmsh with a multiscale solver written in C++. 
> Until nom I assigned physical entities for each sub-domains and 
> interfaces that I wanted and created manually a file containing a tag 
> for materials.
> I read tutorials and I saw that in the 2.0 version of the msh files, it 
> is possible to use partition and sort it in the msh file. Using these 
> partitions should be very interestiong for me because I will apply 
> physical entities for materials and partitions for sub-domains.
> Can you explain me how to create these partitions in the gmsh.1.61.0 
> version under linux.

The general idea is that you should partition your mesh using your own 
tools: the new file format just allows you to keep track and visualize 
these partitions in an easy way.

Now version 1.61 also includes very preliminary support for partitioning
a mesh directly with gmsh from the command line with the "-partition"
flag (e.g. "gmsh tutorial/t1.geo -2 -partition 16"). But beware that 
this feature is undocumented, unsupported, and still buggy.



> Thank you very much for your help
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-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine