Hi,
the problem of nonconformal mesh at volume interfaces is still not resolved
(see old posts below); the "cut and merge faces" algorithm works only in simple
cases. I would like to know if there is work going on to solve this problem
within gmsh. A full solution would have to be able to treat partially
overlapping faces of arbitrary shape.
What is your point of view regarding this problem?
Thank you,
Matthias
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Von: Zenker, Dr. Matthias
Gesendet: Mittwoch, 26. September 2012 13:05
An: 'Jean-François Remacle'
Cc: gmsh@geuz.org
Betreff: AW: [Gmsh] import external-generated geometry in gmsh
Hi,
the problem of nonconformal mesh at volume interfaces is really annoying.
I have tried to find a solution by processing a surface mesh with a scilab
script, cutting and merging duplicated interfaces, redefining the volumes and
doing the 3D mesh in gmsh. My tool is not mature yet since the handling of
partially overlapping surfaces is not working like it should. But it works for
duplicated surfaces which are identical, even in cases when the "cut and merge
faces" recently implemented in gmsh fails.
Do I understand correctly from the message below ("We can imagine to modify the
algorithm and mesh series of connected volumes together.") that there is a
solution within gmsh in sight? Is there actually work going on at this field?
If I can contribute to a solution, I would be glad to do so.
Best regards,
Matthias
Von: Jean-François Remacle [mailto:jean-francois.rema...@uclouvain.be]
Gesendet: Mittwoch, 26. September 2012 11:10
An: stefan.kre...@schoeck.de<mailto:stefan.kre...@schoeck.de>
Cc: gmsh@geuz.org<mailto:gmsh@geuz.org>
Betreff: Re: [Gmsh] import external-generated geometry in gmsh
Le 25 sept. 2012 à 08:59,
stefan.kre...@schoeck.de<mailto:stefan.kre...@schoeck.de> a écrit :
Hello Prof. Geuzaine
hello Prof. Remacle,
i have a question to your great tool gmsh:
Is there any possibility to generate a three-dimensional geometry (with several
domains (=different materials) with an external software
then import and mesh it with gmsh?
Yes : we handle STEP, BREP and IGES inputs.
I have tried this with freeCAD and exported a brep-file of my geometry but the
problem is that common faces of volume bodies in the geometry
was saved twice (each belongs to one domain) and so the gmsh' mesh-algorithmus
was not able to mesh the domains correctly.
It is possible that freecad outputs volumes that have one face in common and
that face is duplicated. In this case, our basic 3D mesh
actually fails because all volumes are meshed together and this particular
situation generates duplicated points. We can imagine to
modify the algorithm and mesh series of connected volumes together. Another way
is to save volumes separately with freecad, mesh
them and merge meshes.
Maybe there is another way, generating a 3D-geometry (should be scriptable) and
match the domains with material properties so that getdp could solve the
problem.
Do you have any ideas or hints?
Thanks in advance for your help
Best regards from south-germany
Stefan Kremer
Dipl.-Phys. Stefan Kremer
Strategic Productmanagement
Schöck Bauteile GmbH
Vimbucher Straße 2
76534 Baden-Baden
Tel. +49 7223 967-204
Fax +49 7223 967-7204
Mobil +49 173 5717495
stefan.kre...@schoeck.de<mailto:stefan.kre...@schoeck.de>_______________________________________________
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------------------------------------------------------------------
Prof. Jean-Francois Remacle
Universite catholique de Louvain (UCL)
Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering
Institute of Mechanics, Materials and Civil Engineering (iMMC)
Center for Systems Engineering and Applied Mechanics (CESAME)
Tel : +32-10-472352 -- Mobile : +32-473-909930
_____________________________________________________________________
ERBE Elektromedizin GmbH
Firmensitz: 72072 Tuebingen
Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede
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