On 12/11/2013 11:53 AM, George Ntemos wrote:
Dear Gmsh Development Team,
My name is George Ntemos and I am a PhD student in the Aeronautics
Department of Imperial College London. Our team is developing and
applying CFD software, using gmsh for high-order meshing purposes.
I am currently studying a flow case around a rod-aerofoil set-up and
I've been experiencing some problems with high-order meshing. More
specifically, the meshing algorithm fails to mesh in high order around
the (spline-defined) aerofoil profile. Please find attached a
lightweight .geo file of my configuration just for demonstration
purposes. If one tries meshing this file in 3d and for order > 1, gmsh
will warn that, to my understanding, the algorithm fails to properly
converge at certain points, visibly resulting in quite severe
discrepancies for a few elements (curvilinear on). It also warns that it
cannot orient the normal for the two extruded surfaces of the rod
(cylinder) boundary layer. It is worth noting here that I am
experiencing none of the above problems when I am meshing in 2d. Since
my 3d mesh is just a simple extrusion, I would assume that extending to
3d is just a trivial case of translating every operation along the 3^rd
dimension. I am of course not particularly experienced in using gmsh
however and I may very well be missing something here.
Hi George,
this reminds me of a bug upon which I stumbled myself. Sebastian Eiser
then pointed me to the bug report:
https://geuz.org/trac/gmsh/ticket/184 (gmsh:gmsh)
As far as I know, this is still not fixed.
If you observe this with the latest svn version, you can add your
example to the bug report, to give it more weight.
Rene
--
----------------------------------------------------
Dr. Rene Schneider
TU Chemnitz, Fakultaet fuer Mathematik,
09107 Chemnitz, Germany
Besucheradresse / Visitor address:
Reichenhainer Str. 41 / Raum 625
09126 Chemnitz, Germany
Tel.: +49-371-531-33953
Fax: +49-371-531-8-33953
[email protected]
http://www.tu-chemnitz.de/~rens
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