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[Getfem-users] Transient analysis-dirichlet conditions
From: |
Sébastien Janas |
Subject: |
[Getfem-users] Transient analysis-dirichlet conditions |
Date: |
Wed, 4 Jun 2008 10:30:52 +0200 |
Hi all,
I want to solve the transient linear equation of diffusion.
It seems that there is no function pre-build in getfem for the
transient problems. So I assemble the mass matrix (MM) and stiffness
matrix (SM) "manually", and then construct the linear system A*X=B
using the backward euler
A = (MM + delta t * SM)
B = MM * X(t-1)
Then I have to impose dirichlet conditions on the surface. I import my
mesh from gmsh, where the surface are tagged with a number (in my case
200). How can I modify my linear system to take into accompt the
dirichlet conditions? All the functions I found in the documentation
are in the case where you use model bricks or standard assembly
procedures...
If I can have the list of node numbers tagged by 200 I would use the
penalty method. But I am not able to obtain these list.
I am using the python interface of getfem.
Thanks for your help,
Best regards,
Janas Sébastien
- [Getfem-users] Transient analysis-dirichlet conditions,
Sébastien Janas <=