[Gmsh] Breakdown due to memory problems : localfill h
Christophe Geuzaine
cgeuzaine at ulg.ac.be
Thu Jun 12 12:10:02 CEST 2008
Hello Marcus - Indeed, there was small bug in our Netgen interface,
which led to some weird size-dependency during Netgen's initial mesh
generation.
This should be fixed in tomorrow's nightly snapshot. Can you give it a
try and let us know?
PS : your transfinite volume seems to be wrong (volume/surface edges
intersect). You might want to extrude the volume instead, as extrusions
will enforce the matching automatically.
Marcus Drosson wrote:
> Hello,
>
> a problem appears when I try to generate a 3D grid that combines
> transfinite and unstructured volumes. Using the Netgen grid generator,
> the memory size increases up to the breakdown of my computer (more than
> 3GB). The 2D grid is constituted of only 15244 triangles. Tetgen is able
> to generate a 3D grid but the interface between the transfinite and the
> unstructured grid doesn't respect the continuity of the tetrahedrons
> (huge arbitrary elements at one side and a structured grid at the other
> side).
>
> In order to verify that the problem doesn't come because I use different
> types of grids, I put into comment everything except two rectangular
> boxes (-> new.geo). Even for this very simple case, the grid generation
> failed due to a memory problem. Using gmsh version 1.65, any problem
> appears and the grid is generated in a few seconds. In the same way,
> when I create a new .geo file to draw a box (with/without a hole),
> everything works correctly. Thus the problem shouldn't be related to a
> wrong configuration parameter of gmsh.
>
> ".geo" -files and the gmsh output are attached.
>
> Thanks!
> Marcus Drosson
>
>
>
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine