[Gmsh] structured grids without extrusion

[Christophe Geuzaine]

Filipe Silveira wrote:
> Hi,
> 
> I'd like to know if it is possible (and how) to make two-dimensional  
> structured grids without make the geometry and mesh extrusions made on  
> the examples at gmsh site.

you can use Transfinite meshes:

Point(1) = {0,0,0,0.1};
Point(2) = {1,0,0,0.1};
Point(3) = {0,1,0,0.1};
Point(4) = {3,0,0,0.1};
Point(5) = {3,3,0,0.1};
Point(6) = {0,3,0,0.1};
Line(1) = {3,6};
Line(2) = {6,5};
Line(3) = {5,4};
Line(4) = {4,2};
Circle(5) = {2,1,3};
Line Loop(6) = {3,4,5,1,2};
Plane Surface(7) = {6};
Transfinite Line {1} = 20 Using Progression 1.2;
Transfinite Line {4} = 20 Using Progression 1./1.2;
Transfinite Line {3,2} = 10 Using Progression 1;
Transfinite Line {5} = 19 Using Progression 1;
Transfinite Surface {7} = {3,6,4,2} Alternated;
Recombine Surface {7};



> 
> Thanks for answer,
> 
> Filipe
> 
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> 
> 


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine