[Gmsh] Restrict Field

Christophe Geuzaine cgeuzaine at uliege.be
Mon Apr 27 16:55:01 CEST 2020

Hello Nicolas,

> On 27 Apr 2020, at 12:47, Karin&NiKo <niko.karin at gmail.com> wrote:
> Dear Gmsh gurus, 
> I would like to assign some size fields depending on some mathematical expressions *and* depending also on  regions. 
> To this end, I used the Restrict field but my use seems to be inappropriate. Unfortunately, there are no test or example.

cf. https://gitlab.onelab.info/gmsh/gmsh/-/blob/master/benchmarks/2d/field_restrict.geo

> Could you please provide me with some help?

Since you restrict all the fields to the volumes only, the 1D and 2D meshes have no mesh size constraint - hence the very coarse mesh boundary mesh.

Here's your example with sizes on the boundaries as well:

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> My example is attached to this email.
> Best regards,
> NiKo
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 

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