[Gmsh] Integer flag to .msh elements

[David Colignon]

On 24/10/13 11:57, Umberto Iemma wrote:
>
> First, I'd like to thank the authors for the wonderful work they are doing !
> Gmsh is one of the most useful free technical tools ever!
> Thanks!
>
> After this, I have a question.
>
> It is possible to include in the .msh file a integer flag to each element ?
> I need this to specify particular physical properties of the boundary.


Hi Umberto,

you should use Physical groups for that purpose, see 
http://geuz.org/gmsh/doc/texinfo/gmsh.html#Elementary-vs-physical-entities

"Groups of elementary geometrical entities can also be defined and are called “physical” entities. 
These physical entities cannot be modified by geometry commands: their only purpose is to assemble 
elementary entities into larger groups, possibly modifying their orientation, so that they can be 
referred to by the mesh module as single entities. As is the case with elementary entities, each 
physical point, physical line, physical surface or physical volume must be assigned a unique 
identification number. "


and tutorial t1.geo, http://geuz.org/gmsh/doc/texinfo/gmsh.html#t1_002egeo


Regards,

Dave

-- 
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Université de Liège
Sart-Tilman B28
10, Grande Traverse
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
WWW:    http://www.ceci-hpc.be/

>
> I'm the coordinator of the open-source project AcouSTO http://acousto.sourceforge.net, a tool
> for acoustic simulation. I'm going to release soon version 1.6 including the possibility to read
> Gmsh files.
> Everything is working fine and the release candidate could be issued now, but this additional
> possibility
> would broaden significantly the field of application.
>
> Thanks in advance,
> Umberto
>
> *****************************************************************
>     Prof. Umberto IEMMA
>     Associate Professor of Aerospace Structures and Design
>     Dip. di Ingegneria - Universita' Roma Tre
>     via Vito Volterra 62, 00146 Roma
>     tel. +39-0657333274 fax  +39-065593732
>     www   : http://acousto.sourceforge.net
> *****************************************************************
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