[Gmsh] Boundary layers in gmsh?

[Christophe Geuzaine]

On 24/02/10 11:26, julien hoessler wrote:
> Hi Eric,
> If it is a flat surface or if you know where the interface would be
> located you can just move your domain line/surface to the interface and
> extrude it towards the outside, but otherwise I can't seem to find a way
> to link the interface with the rest of the mesh

Hi Guys - boundary layers are still a bit experimental, but the basics 
are there to connect them with other geometrical entities. Attached are 
two examples:

* sphere_boundary_layer.geo shows how to connect volumes to boundary 
layer faces ;

* t1_boundary_layer_connection.geo shows how you can also connect things 
to the lines or vertices created during the boundary layer generation.

Retrieving the id numbers of the extruded entities can be done in a 
script the usual way (list[] = Extrude...), but as usual this only gives 
access to the ids of the "top" surface, the new volume and the "lateral" 
surfaces.

To retrieve the ids of the new lines and the new points, you have at the 
moment to resort to the GUI (in "Tools->Options->General->General" 
select "Enable mouse hover over meshes" to see the numbers displayed at 
the bottom of the graphical window).

Hope this helps,

Christophe

> regards
> Julien
> On 24 Feb 2010, at 02:03, Eric Nutsch wrote:
>
>> Hi,
>>
>>
>> Has anyone successfully gotten an extruded boundary layer to interface
>> with a mesh?
>>
>>
>> Thanks,
>> Eric Nutsch
>>
>> _______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org
>> http://www.geuz.org/mailman/listinfo/gmsh
>
> Julien Hoessler
> PhD Student
> Department of Aeronautics
> Imperial College London
>
> Phone: +44 (0) 20759 45042
> Email: julien.hoessler06 at imperial.ac.uk
>
>
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh
>
>


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: sphere_boundary_layer.geo
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20100224/7d9fdd21/attachment.geo>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: t1_boundary_layer_connection.geo
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20100224/7d9fdd21/attachment-0001.geo>