[Gmsh] Mesh Size at circles

Christophe Geuzaine cgeuzaine at ulg.ac.be
Tue Mar 4 15:09:55 CET 2014

On 04 Mar 2014, at 08:30, Marc Schöning <marc.schoening at mcschoening.de> wrote:

> Hello list,
> I am facing a problem meshing huge 2D geometries.
> Typically, controlling mesh size with the fourth argument of point definition works very well, but I am missing a possibility to control the mesh size (probably I just missed the right option) in the area of small circles.

You can try setting e.g.

Mesh.MinimumCirclePoints = 3;

(the default is 7). Does it help?

> The attached screenshot of a meshed stator (of an electrical machine) illustrating my problem. All points in the stator tooth and stator yoke area have the same mesh size given by the corresponding points. But in the area of the small circle, the mesh size is very fine and I am not able to coarsen it more. I tried to adjust the mesh size of the circle center point, but it does not change anything.
> Finally, I am running in a very coarse mesh in the stator tooth while I have a very fine mesh in the stator yoke. This results in unnecessary long computation times.
> Any help is greatly appreciated.
> Greetings,
> Marc
> PS: Thank you so much for this fantastic program!
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science