[Gmsh] Possibility of rectilinear mesh?

[Sefer Bora Lisesivdin]

Thank you very much indeed,

"Transfinite" solution is working quite well. I want to add the most
easiest geometry file possible to this email. It may show an easy solution
for the people who needs 2D rectilinear grid or uniform quadrilateral or
triangular meshes.

-------------simplesquare.geo-------------
cl__1 = 1;
Point(2) = {0, 0, 0, 1};
Point(3) = {1, 0, 0, 1};
Point(4) = {1, 1, 0, 1};
Point(5) = {0, 1, 0, 1};
Line(1) = {5, 4};
Transfinite Line {1} = 10Using Progression 1;
Line(2) = {4, 3};
Transfinite Line {2} = 10Using Progression 1;
Line(3) = {3, 2};
Transfinite Line {3} = 10Using Progression 1;
Line(4) = {2, 5};
Transfinite Line {4} = 10Using Progression 1;
Line Loop(6) = {1, 2, 3, 4};
Plane Surface(6) = {6};
Transfinite Surface {6};
----------------------------------------------------

Best regards,

Assoc. Prof. Dr. Sefer Bora Lisesivdin,
Gazi University, Department of Physics,
Nanoscale Devices and Carrier Transport Group,
http://sblisesivdin.ndct.org/
Ankara, TURKEY


On Mon, Oct 6, 2014 at 10:20 AM, Christophe Geuzaine <cgeuzaine at ulg.ac.be>
wrote:

>
> On 05 Oct 2014, at 13:52, Sefer Bora Lisesivdin <sblisesivdin at gmail.com>
> wrote:
>
> > Dear all,
> >
> > We are studying band structures of semiconductor heterostructures and
> our software is using gmsh meshes as its geometric information input.
> >
> > For 1D and complex 3D structures, gmsh meshes work well. But for 2D
> studies we need uniform meshes. Our 2-dimensional studies include thin film
> structures which have few nm layers with smooth interfaces between the
> layers.
> >
> > We tried quadrilateral meshes with symmetrical points to make more
> uniform. However, with a small difference in the mesh, we obtained very
> different results.
> >
> > If you simply google "HEMT mesh" for images, you can see some mesh
> images of transistors with uniform triangular or quadrilateral meshes for
> other simulators.
> >
> > What I looking for is the "rectilinear" grid. Is it possible to make 2D
> rectilinear grid with GMSH?
>
> Yes: you can use "Transfinite" mesh constraints for this and/or create
> your geometries with "Extrude" and specify regular grids with the "Layers"
> command. See tutorial/t6.geo and tutorial/t3.geo for simple examples.
>
>
> > If not, at least may you please suggest some possible programs that can
> export in GMSH .msh filetype?
> >
> > Best regards,
> >
> > Assoc. Prof. Dr. Sefer Bora Lisesivdin,
> > Gazi University, Department of Physics,
> > Nanoscale Devices and Carrier Transport Group,
> > http://sblisesivdin.ndct.org/
> > Ankara, TURKEY.
> > _______________________________________________
> > gmsh mailing list
> > gmsh at geuz.org
> > http://www.geuz.org/mailman/listinfo/gmsh
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
>
>
>
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