Hi,
you should first read the first tutorial:
http://geuz.org/gmsh/doc/texinfo/gmsh.html#t1_002egeo
and the documentation:
http://geuz.org/gmsh/doc/texinfo/gmsh.html#Mesh
...
Every meshing step is constrained by the characteristic length field, which can be uniform, specified by characteristic
lengths associated with points in the geometry,...
http://geuz.org/gmsh/doc/texinfo/gmsh.html#Characteristic-lengths
6.3.1 Characteristic lengths
There are three ways to specify the size of the mesh elements for a given
geometry:
1. First, if Mesh.CharacteristicLengthFromPoints is set (it is by default), you can simply specify characteristic
lengths at the geometrical points of the model (with the Point command: see Points). The size of the mesh elements will
then be computed by linearly interpolating these characteristic lengths on the initial mesh (see Mesh).
...
http://geuz.org/gmsh/doc/texinfo/gmsh.html#Points
Point ( expression ) = { expression, expression, expression <, expression > };
Creates an elementary point. The expression inside the parentheses is the point's identification number; the three
first expressions inside the braces on the right hand side give the three X, Y and Z coordinates of the point in the
three-dimensional Euclidean space; *the optional last expression sets the characteristic mesh length at that point*
...
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
On 13/12/09 10:13, aditap khonjug wrote:
I'm use gmsh for My thesis.
I have very problem with characteristic length of gmsh.
I would like to define mesh size by defined characteristic length.
How to defined characteristic length? if I would like to defined mesh size.
thank you for attention.
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