On 21/06/10 13:07, Laurent Michel wrote:
Hi,
I've been using gmsh for some time now (but very basically), and there
is a couple of things I'd like to have a few hints for, if possible.
First, I want to mesh a glacier. For this, I mesh its bed by hand. I
don't care about its surface, because I am solving a free surface
problem, hence I mesh a bit more than the actual glacier. The shape of
the top of the mesh (I am referring to the part at the top of the
glacier surface) can be whatever, I don't care. However, I'd like to get
an anistropic mesh. How can I do that?
For structured grids, you can easily generate highly anisotropic grids
with the "Transfinite" command.
For unstructured grids we currently only generate isotropic grids, but
we are working on interfacing bamg, which will allow nice unstructured
(2D) meshes.
Second, I am doing parallel simulations, and I'd like to refine my mesh
in a certain way. For instance, I'd like to exactly double the amount of
nodes of my mesh. How do you do that with gmsh? There is a command
refine, but it doesn't do that, as far as I have understood.
No problem for structured grids. Exactly doubling the number of nodes
for unstructured grids is not easy...
Thanks,
L.
--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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