David is right, and sure maybe we should automatically optimize 3D
delaunay meshes
JF
Le 25-août-10 à 20:53, David Colignon a écrit :
On 25/08/10 19:12, 류은현 wrote:
Before asking, Thank you for your kind answer about my preivous
question.
It was so helpful to me.
I am working on developing 3D FEM application related with
neutronics problem.
Following is my first question
Today I made 3D domain, that has physical volumes. But I saw that
the jacobian of certain element is zero.
Because of a element that is consist of 4 nodes which are located
on same plane!
Hi,
Did you try the Tools->Options->Mesh->Advanced->"Optimize quality of
tetrahedra" option ?
Why does GMSH produce such a strange element? Does it due to my
fault in making GMSH input?
Impossible to answer without your .geo file ...
regards,
Dave
--
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Institut Montefiore B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
Fax: +32 (0)4 366 29 10
WWW: http://hpc.montefiore.ulg.ac.be/
Agenda: http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
Of course, I can eliminate that element by giving certain condition
to my code, it seems to be strange.
Please tell me in detail, if the reason is related with my input.
My second question is associated with defining volume. I understood
that the orientation of surfaces which will
constitute the volume should be consistent. But if we want to make
a cube or hexahedron volume, the following order of
surface index is OK? I mean that writing index(upper plane),
index(lower plane), index(left plane),.... , not continuously.
Please tell me in detail. Sorry for bothering you.
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Prof. Jean-Francois Remacle
Universite catholique de Louvain (UCL)
Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering
Institute of Mechanics, Materials and Civil Engineering (iMMC)
Center for Systems Engineering and Applied Mechanics (CESAME)
Tel : +32-10-472352 -- Mobile : +32-473-909930
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