[Gmsh] WG: "healing" STEP files using netgen

[Zenker, Dr. Matthias]

Hi again,

I am re-sending my question below since I still hope for an answer: Is the "geometry healing" function of netgen available in gmsh, or would it be possible to implement it? This would be most useful for all those who need to mesh STEP geometries having adjacent bodies.

Thank you,

Matthias

> ______________________________________________ 
> Von: 	Zenker, Dr. Matthias  
> Gesendet:	Donnerstag, 27. Januar 2011 15:29
> An:	'gmsh at geuz.org'
> Betreff:	"healing" STEP files using netgen
> 
> Hi,
> 
> I have had a problem with STEP geometries having double surfaces at the interface between adjacent bodies, resulting in a non-conformal mesh. The consequence is that e.g. no current or heat can flow across the interface.
> A workaround I have found is to load the STEP file into Joachim Schöberl's netgen software, execute "Heal geometry" in the "IGES/STEP Topology Explorer/Doctor" and export the "healed" geometry as STEP. When I open that one with gmsh, the duplicate surfaces are gone, and I get a nice conformal mesh. 
> I could of course generate the mesh in netgen, but I did not succeed to generate a grid which was fine or coarse where I wanted it to be, since I did not find a functionality equivalent to gmsh's setting of the characteristic length. So I still prefer to generate the mesh with gmsh.
> 
> Now comes my question: since at least a part of the netgen functionality seems to be included in gmsh, is it possible that this is also the case for the "geometry healing"? It would be most comfortable to be able to launch that one from within gmsh. So: Is this already possible, or can it be done?
> 
> Thank you,
> 
> Matthias
> 
> ----------------------------------------------------------------
> ERBE Elektromedizin GmbH
> Dr.rer.nat. Matthias Zenker
> Dipl. Phys.
> Grundlagenentwicklung / Fundamental Development
> Waldhoernlestrasse 17
> 72072 Tuebingen
> Germany
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> URL: http://www.ERBE-med.com
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