[Gmsh] 3D meshing problem

Christophe Geuzaine cgeuzaine at ulg.ac.be
Mon Feb 17 19:33:42 CET 2014

Dear Adrian,

Both models do not seem topologically correct (and both fail to mesh on my machine). For example in geom_bat.geo, the lateral surface 610 is not connected with the bottom surfaces: curve 1389 should be split in 2 to fix this, to connect with point 769 in the middle. (Gmsh does not compute intersections for you, so you have to divided these curves "manually".)


On 17 Feb 2014, at 10:32, adrien gros <adriengros at hotmail.fr> wrote:

> Hi!
> sorry i forgot the attached files
> thanks
> Adrien Gros
> From: adriengros at hotmail.fr
> To: gmsh at geuz.org
> Subject: 3D meshing problem
> Date: Fri, 14 Feb 2014 18:56:02 +0100
> Hi!
> I use GMSH to mesh air around building. For this i made a python script to define one by one all building surfaces ( composed of wall and windows) and ground surfaces.
> After have defined all this surfaces i define a surface loop and next a volume to define the volume around building.
> I don't understand why i can't mesh my geometry in 3D ( it's work with 2D mesh). 
> I try the same geometry but without windows and the 3D meshing work.
> Somebody can explain me why it doesn't work
> you can find in attached files :
>  the geometry geom_bat.geo without windows which can be mesh
> the geometry geom_bat_window.geo with windows one one building which can't be mesh. In this geometry the building is composed of the surface 429,430,431,432,433,434,435 and 436. And windows are surfaces number 602,603,604,605,607,608 and 609.
> i Hope you will be able to help me 
> thank
> Adrien
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science