[Gmsh] Merging Surfaces

[Jean-Francois Remacle]

Le 05-août-09 à 19:54, David Colignon a écrit :

>
> Mike B. wrote:
>> Dear All,
>> I generate a set of surfaces (patches) which together define a  
>> closed shell and then use a surface loop to define the closed shell.
>> Meshing this setup creates a separate mesh for each surface  
>> (patch). How can I make Gmsh:
>> a)  `glue' all these `patches' together and treat them as a single  
>> surface?
>
> Hi Mike,
>
> AFAIK, it is not possible in Gmsh.
>

There is a new experimental feature in GMSH called compound surfaces.

I you aim at meshing together patches 10 and 11, add to your file

Compound Surface(1000) = {10,11} Boundary {{},{},{},{}};

The syntax is still flaky, yet it should produce both a mesh for your
patches and for the compound (use gmsh -saveall in order to have
all the elements in the final file).

Here is a small example of a multiple patch reparametrization.

Not that the stuff works also for edges and volumes.

JFR

Compound edges exist too !
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BENNE-GEO-REPARAM.png
Type: image/png
Size: 115891 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20090807/08733a2c/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BENNE-GEO.png
Type: image/png
Size: 150557 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20090807/08733a2c/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BENNE-M.png
Type: image/png
Size: 65826 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20090807/08733a2c/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BENNE-MREPARAM.png
Type: image/png
Size: 38925 bytes
Desc: not available
URL: <http://www.geuz.org/pipermail/gmsh/attachments/20090807/08733a2c/attachment-0003.png>
-------------- next part --------------



> Cheers,
>
> Dave
>
> --
> David Colignon, Ph.D.
> Collaborateur Logistique du F.R.S.-FNRS
> CÉCI - Consortium des Équipements de Calcul Intensif
> ACE - Applied & Computational Electromagnetics
> Institut Montefiore B28
> Université de Liège
> 4000 Liège - BELGIQUE
> Tél: +32 (0)4 366 37 32
> Fax: +32 (0)4 366 29 10
> WWW:    http://hpc.montefiore.ulg.ac.be/
> Agenda: http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
>
>
>
>> b) following a), create a single mesh covering the entire closed  
>> shell?. Currently, since Gmsh treats each patch seperately and does  
>> not `see' the full shell if I want to refine the mesh I must set  
>> the element size to be smaller then the sides of the patches, but  
>> it should relate to the sides of  the entire shell.
>> Cheers and thanks,
>> Mike.
>> ------------------------------------------------------------------------
>> _______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org
>> http://www.geuz.org/mailman/listinfo/gmsh
>
>
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh

----------------
Prof. Jean-Francois Remacle
Universite catholique de Louvain (UCL)
Tel : +32-10-472082 -- Mobile : +32-473-909930