[Gmsh] Meshing composite volumes

[Martin Vymazal]

Hello Theodore,

 could you send me the stl files? If I manage to produce the mesh, I'll send the geo file 
to you.

 Best regards,

    Martin Vymazal


On Tuesday 30 of April 2013 17:18:33 Ted Kord wrote:


Hi Martin,



Thanks. Is this what you mean?


Merge "polygon.stl";Merge "ellipsoid.stl";

CreateTopology;

Physical Surface (1) = {1};Physical Surface (2) = {2};





I'm not sure what to do after this to remove the ellipsoid from the polygon?



Best regards,



Theodore





On 30 April 2013 15:18, Martin Vymazal <martin.vymazal at vki.ac.be[1]> wrote:


Hi Theodore,
 
you need to tell gmsh that the surface contains a hole. Define two line loops - one for 
the contour of the external polygon (say Line Loop 1) and one for the contour of the 
ellipse (say Line Loop 2). Then you define your surface for meshing as 
 
Plane Surface(1) = {1,2}; // Subtract the interior of line loop 2 
// from the interior of line loop 1
 
See section 5.1.3 in gmsh reference manual or tutorial 3 on gmsh website. 
 
If you don't have any lines to create line loops from (since you're loading an stl file), 
take a look at 'CreateTopology'. 
 
Best regards, 
 
Martin Vymazal
 
On Tuesday 30 April 2013 12:32:34 Ted Kord wrote:


Hi,



I have an STL mesh consisting of an irregular ellipsoid in an irregular polygon. When I 
turn off 'surface faces' in the 'Options - Mesh', I can see the ellipsoid in the polygon. 
What I'd like to do is mesh just the containing polygon excluding the ellipsoid, i.e., 
the final mesh will have a hole where the ellipsoid should be. How can I do this in 
gmsh?






Theodore





gmsh at geuz.org[2]
http://www.geuz.org/mailman/listinfo/gmsh[3]





Theodore





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