Thanks Christophe, got again the point! Works quit well for me now.
Is it possible to script the hight order tools in a geo file? I could
not find anything in this regard (only the window position ?!?)
bernd
Zitat von Christophe Geuzaine <[email protected]>:
On 30 Mar 2016, at 07:30, Bernd Hahnebach <[email protected]> wrote:
Thanks Christophe!
I got the problem of the high order meshes by reading a big part of
the paper. :-) :-) Is there any user documentation or an example
how to use the HighOrderTools around?
Just to get it the right way done. How does it work in the gui?
1) Load the geometry
2) Mesh (e.g. press "3" to do a 3D mesh)
3) Open "High order tools"
- Choose the polynomial order and press "Generate" (this will
create high order elements)
- Press "Regularize" (this will optimize the high order elements)
- Load the geometry (in my case a BRep)
- make the adjustments on Tools --> Options --> Geometry and Mesh
--> one of them is 2nd order mesh
- In GMSH Tree press Mesh 1D, 2D, 3D
- on 3D I get negative Jacobians if the mesh order in options is set to two
- do not use any optimization, do not use the order buttons (mesh
is 2nd order already)
- open HighOrderTools
- Generate 2nd order vertices
- Regularize with given values
- Or do I have to start with a 1st order mesh and use Generate 2nd
order vertices on a 1st order mesh?
- Should any of the optimizations be done before the HighOrderTools?
kind regards bernd
Zitat von Christophe Geuzaine <[email protected]>:
On 24 Mar 2016, at 19:06, Christophe Geuzaine <[email protected]> wrote:
On 24 Mar 2016, at 12:27, Bernd Hahnebach <[email protected]> wrote:
What is the recommended way to avoid such negative jacobians?
Attached the geometry of the mesh above.
And to avoid such negative jacobians, you can use the "High order
tools" (in the Mesh menu). This is still experimental, but works
quite well. The algorithms are described (in part) in
T. Toulorge, C. Geuzaine, J.-F. Remacle, J. Lambrechts. Robust
untangling of curvilinear meshes. Journal of Computational Physics
254, pp. 8-26, 2013.
http://gmsh.info/doc/preprints/gmsh_untangling_preprint.pdf
Christophe
--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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