[Gmsh] Gmsh 4 format - How to associate elements with physical entities

[Christophe Geuzaine]

> On 7 Oct 2018, at 10:30, Santiago Serebrinsky <sserebrinsky at gmail.com> wrote:
> 
> Hi all,
> 
> With Gmsh 2.2 format, it was very easy to tell which elements were associated with each of the PhysicalEntities. Such tag was present in the line describing the element data.
> 
> With Gmsh 4, I could not find such association.
> Every element is part of a block with a given tagEntity, but I found no relation between those tagEntity values and PhysicalNames.
> 
> Is that described anywhere?

Yes, in the $Entities section (see http://gmsh.info/doc/texinfo/gmsh.html#File-formats): each elementary entity can be associated to a number of physical groups.

Christophe

> 
> Thanks.
> 
> Santiago
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

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