[Gmsh] post-processing: how to integrate over physical surface?

[Christophe Geuzaine]

Ingmar Rauschert wrote:
> Hi,
> 
> I am using GMSH for flow simulation and am interested in the pressure forces at
> boundary surfaces. I got pretty familiar with meshing now, but I seem to not
> get a good grip onto the post-processing module.
> 
> My question: 
> 
> I have a scalar (pressure) view of a 3D object and I want to integrate the
> pressure over a particular (physical) surface. Now, I know there is the
> "integrate" plugin, but I could not find a way how to extract only a particular
> boundary surface. The surfaces I deal with are non-planar and quite irregular,
> so that cutting out a plane or even trying to parametrize a plane is not
> feasible. I tried all kinds of things, none worked out! 
> 
> Is there a way to specify (or cut out) a physical surface from an iView just
> like it works for a geometry via Tools->Visibility?
> 

No: you'll have to create the .pos file with just that surface.



> I appreaciate any suggestions.
> 
> Thanks,
> Ingmar
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-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine