[Gmsh] Physical Surfaces/volumes in unv format

[Christophe Geuzaine]

Jacques Kools wrote:
> Hello Folks,
> 
>  
> 
> I had a question regarding physical/volumes in unv format :
> 
>  
> 
> I created a mesh in Salome (see attached file), and defined groups of 
> faces ( their equivalent of physical surfaces). They are named 100, 102 
> and, 103.
> 
>  
> 
> I am not familiar with the structure of the unv files ( That  structure 
> seems to be one of the great mysteries of our time. It is very difficult 
> to find a simple document describing the format.)
> 
> However, when I look at the file, I can see these numbers appearing ( 
> lines 1013, 1145 and 1157) in a section starting with 2467. Now, when I 
> open the file in gmsh 2.08 (windows) , I can only see one geometrical 
> and one physical surface !!
> 

Hi Jacques - That's "normal". Due to the large number of possible 
"group"-type records in the UNV spec, Gmsh does not read any of them...

To determine the elementary/physical region tags, Gmsh simply reads the 
3rd and 4th tag in each element (UNV record 2412).

Christophe



>  
> 
> For what it is worth : here is a discussion on the openfoam board of 
> what seems to be the same problem. 
> http://openfoam.cfd-online.com/forum/messages/126/5175.html?1188239030
> 
>  
> 
> All the best,
> 
>  
> 
> Jacques
> 
> 
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> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine