[Gmsh] Adding a surface to define a specific boundary condition

[jerome messineo]

Hi,

I am trying to realize a simple mesh based on a combination between a 
structured one close to the wall and unstructured for the rest of the 
domain. I start with a simple geometry  without any additional circle on 
the surface, there is no problem for the 3D mesh generation.

Then I try to add a circle to define a different boundary condition, and 
the creation of the 3D elements in the last volume fails (see figure). 
The surface edges seem to be correct. I tried to use an interface volume 
between the structured and unstructured parts (as mentionned in the 
user's manual) using the option QuadTriAddVerts to keep the structured 
part intact, with no result.

Is there an evident solution I am missing ? This seems to be a simple 
problem so I think I am doing something wrong.

I attach the .geo.

Thanks in advance

Sincerly

Jérôme

PS: I use the 2.8.4 version of gmsh

-- 
Jérôme Messineo - PhD Student (tel. 6382)
Laboratoire de Propulsion
Département Modèles pour l'Aérodynamique et l'Energétique
Office National d'Etudes et de Recherches Aérospatiales

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