[Gmsh] Problem with volume creation in 3D geometry

David Colignon David.Colignon at ulg.ac.be
Mon Apr 12 12:04:20 CEST 2010

Hi Marina,

Nice geometry!

If you mesh your geometry in 2D and activate Tools->Options->Mesh-Visibility->Surface faces , you can see that the 
surfaces delimited by lines/circles 2304, 2198, 2197, 2254  and 2177, 2178, 2294, 2244 are not meshed ... Can you check 
these surfaces (and possibly others) that could create "holes" in the external surface ?



David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Sart-Tilman B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
Fax: +32 (0)4 366 29 10
WWW:    http://hpc.montefiore.ulg.ac.be/
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On 11/04/10 20:59, Marina Tsili wrote:
> Hello to all gmsh developers and many thanks for this flexible
> open-source mesh creation software, expanding possibilities for finite
> element analysis.
> I am using the latest version of gmsh software for windows, in order to
> construct the 3D geometry of a transformer.
> I am attaching you the respective geo file (GMSH_Transformer.geo)
> consisting of 10 volumes (elementary entities
> 3,4,5,6,1142,1381,1621,1860,2100, corresponding to physical volumes
> 2107,2108,2109,2110,2101,2102,2103,2104,2105 and 2106, respectively)
> representing the cores and coils of the active part. These volumes are
> surrounded by external surfaces consisting of curved (rounded) and
> rectangular parts, representing the geometry of the tank with its
> corrugated panels. Although each part of the external surfaces seems to
> be well defined (and can be selected during the 'Elementary
> Entitities-->Add--->New--->Volume' process), it is impossible to create
> the volume between these outer surfaces and the rest of the volumes in
> the considered geometry.
> Can anybody provide some hint on possible errors in the geometry
> definition? Why, although the outer surfaces seem to create a closed
> surface loop, it is not possible to create a volume surrounded by them?
> Many thanks in advance for your help
> Marina Tsili
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