structured quadrilateral mesh in PDE Toolbox

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Natalia 2014 年 6 月 5 日
Hello, I would like to ask if in the PDE Toolbox it is possible to generate a structured quadrilateral mesh instead of the triangular one? If so how can it be implemented in the code? My geometry is simply a rectangular of dimensions 3cm x 0.1mm and the mesh I would like to create is 0.5mm x 0.005mm. Here is a part of my code:
% Geometry description:
pderect([0 0.03 0.0001 0],'R1');
% Mesh generation:
Thank you very much in advance, N
  2 件のコメント
Alejandro Arrizabalaga
Alejandro Arrizabalaga 2017 年 11 月 29 日
Yes, but the FEA Toolbox requires an additional license.



Bill Greene
Bill Greene 2014 年 6 月 5 日
There is no support for quadrilateral elements in PDE Toolbox-- either in the meshers or the computational modules. However, if you have a rectangular geometry, you can generate a regular triangular mesh using the poimesh function. This option isn't available in the pdetool GUI so you would need to define your problem using the command line interface.
  3 件のコメント
Natalia 2014 年 6 月 11 日
Thank you again for all the help Bill. The reason for defining a regular grid was to obtain the results already on such grid without using the unstructured grid and doing the transformation later.
In any case for one rectangle I defined it as:
width = 0.3; height = 0.0001;
gdmTrans = [3 4 0 width width 0 0 0 height height];
g = decsg(gdmTrans', 'S1', ('S1')');
figure; pdemesh(p,e,t);
I have another question though, if I want to have a structure composed of two rectangles, one on top of another with the coordinates [0 width width 0 height height 2*height 2*height], what would be the best way to define the grid for such system as a whole?
Many thanks, Natalia


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