[Gmsh] #288: Invalid cells for a fine mesh around a sharp leading edge

Christophe Geuzaine cgeuzaine at ulg.ac.be
Mon May 30 18:06:05 CEST 2016

Hi Xavier,

There seem to be different issues with the file:

- some curves are duplicated: when refining the curve visualization (Tools->Geometry->Aspect->Curve subdivisions) for example, curves 18 and 36 seem identical. This is likely a problem with the IGES representation: I would suggest using STEP (or even better the native BREP format since the model seems to come from OpenCASCADE).

- the Characteristic Length command is only applied to some of these duplicate curves.

Could you re-send with the BREP instead of the IGES ?



> On 30 May 2016, at 15:57, GARNAUD Xavier (SAFRAN) <xavier.garnaud at safrangroup.com> wrote:
> Here is the attachement.
> -----Message d'origine-----
> De : GARNAUD Xavier (SAFRAN) 
> Envoyé : lundi 30 mai 2016 15:57
> À : 'gmsh at onelab.info'
> Objet : RE: [Gmsh] #288: Invalid cells for a fine mesh around a sharp leading edge
> Here is an example that gives a similar error (it is not exactly the same but I had to modify the geometry).
> In this case, replacing the cylinder by an edge attractor solves the problem. In my other case it does not.
> Best regards,
> Xavier
> -----Message d'origine-----
> De : Gmsh [mailto:gmsh at ace20.montefiore.ulg.ac.be] 
> Envoyé : dimanche 29 mai 2016 09:52
> Objet : Re: [Gmsh] #288: Invalid cells for a fine mesh around a sharp leading edge
> #288: Invalid cells for a fine mesh around a sharp leading edge
> -------------------+-----------------------
> Reporter:  gmsh    |       Owner:  geuzaine
>    Type:  defect  |      Status:  accepted
> Priority:  minor   |  Resolution:
> Keywords:          |
> -------------------+-----------------------
> Changes (by geuzaine):
> * owner:   => geuzaine
> * status:  new => accepted
> Comment:
> Could you attach a small example?
> --
> Ticket URL: <https://onelab.info/trac/gmsh/ticket/288#comment:1>
> Gmsh <http://gmsh.info>
> A three-dimensional finite element mesh generator with built-in pre- and post-processing facilities
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Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 

Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
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