[Gmsh] Periodic boundary

[Ruth V. Sabariego]

You can extrude the surface and remove the volume obtained in order to 
take into account
the other elements inside your 3D cube.
E.g.:

Point(1)={0,0,0};
Point(2)={1,0,0};
Point(3)={1,1,0};
Point(4)={0,1,0};

Line(1) = {1,2};
Line(2) = {2,3};
Line(3) = {3,4};
Line(4) = {4,1};

Line Loop(1) = {1,2,3,4};
Plane Surface(1)={1};

vol[]=Extrude{0,0,1}{Surface{1};};
Delete {Volume{vol[1]};}

The two surfaces on xy planes have the same mesh.

Regards,
Ruth

On 22/05/10 01:20, Jehanzeb Hameed wrote:
> Hello,
>
> I am trying to create a 3-D cube mesh, such that the opposite faces
> along x and y directions have identical surface meshes, which will be
> useful for me to implement periodic boundary conditions. Is there a
> way to do this in gmsh?
>
> Note that there will be other stuff in the interior of the cube, e.g.
> a cylinder, that will also need to be meshed. I know how to create a
> mesh such that the cube and the cylinder which runs through it is
> meshed, but I dont know how to create periodic (or similar) surface
> meshes at opposite faces of the cube.
>
> Thanks,
> -Jehanzeb
>
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>
>
>    

-- 
Dr. Ir. Ruth V. Sabariego
University of Liege, Dept. of Electrical Engineering&  Computer Science,
Applied&  Computational Electromagnetics (ACE),
phone: +32-4-3663737 - fax: +32-4-3662910 - http://ace.montefiore.ulg.ac.be/