[Gmsh] stretching triangular elements

Hanieh Mirzaee mirzaee at cs.utah.edu
Tue Jan 10 03:03:10 CET 2012

```Jean,

Thanks again for getting back to me. I guess what I am looking for is a
mechanism for "anisotropic unstructured grid" in gmsh. With transfinite
I see that I can generate "anisotropic structured grids". Not sure if
the former feature is available in gmsh yet.

Hanieh

On 1/9/2012 3:53 AM, jean pierre aubry wrote:
> hello
>
> i left school quite a while ago, so i do not really know what is a
> stretched Delaunay triangulation
> but looking in the Gmsh docs you should find a way
> here is what i was speaking off, a bit diffrent from your picture though
>
> Point(1) = {0, 0, 0, cl1};
> Point(2) = {100, 0, 0, cl1};
> Point(3) = {100, 50, 0, cl1};
> Point(4) = {100, 100, 0, cl1};
> Point(5) = {0, 100, 0, cl1};
> Point(6) = {0, 50, 0, cl1};
> Line(1) = {1, 2};
> Line(2) = {2, 3};
> Line(3) = {3, 4};
> Line(4) = {4, 5};
> Line(5) = {6, 5};
> Line(6) = {6, 1};
> Line(7) = {6, 3};
> Line Loop(8) = {4, -5, 7, 3};
> Plane Surface(9) = {8};
> Line Loop(10) = {7, -2, -1, -6};
> Plane Surface(11) = {10};
> Transfinite Line {7} = 11 Using Progression 1;
>
> jean pierre aubry
>
>
>
> Could you please be a bit more specific on the steps? It is not clear
> to me how I can get the stretched elements. In fact, is there a solid
> way in gmsh to generate a stretched Delaunay triangulation?
>
> Hanieh
>
> On 1/6/2012 2:53 AM, jean pierre aubry wrote:
>> hello
>>
>> i had divide the square with a line at midheight
>> make two surfaces one above, one below
>> assign around ten nodes to the midline with Transfinite
>> the mesh the 2 surfaces
>> and
>> i would like your picture
>>
>> jean pierre aubry
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