Hello everybody,
I tried Tutorial 1 (Heat Equation  Temperature field of a solid object) which use pump_carter_sub.stp according to ElmerTutorials.pdf (September 22, 2009). I found that the norm of my solution is about 432.4, but it says it should be around 389.853 in the ElmerTutorials.pdf (page 9).
I think it's unusual and I'd like to figure it out what causes the difference. The solver? or any update of the material library?
P.S.
1) I use the "default netgen mesh" for calculation, 16159 nodes and 65689 tetrahedral elements.
2) Elmer Solver 5.5.0 (Rev: 4266)
3) Linux x86_64
attached is the sif and Solver log for reference.
problem in tutorial 1 (norm of solution)
problem in tutorial 1 (norm of solution)
 Attachments

 Solver_log.txt
 (2.37 KiB) Downloaded 212 times

 case.sif
 (1.95 KiB) Downloaded 159 times

 Site Admin
 Posts: 3775
 Joined: 22 Aug 2009, 11:57
 Antispam: Yes
 Location: Espoo, Finland
 Contact:
Re: problem in tutorial 1 (norm of solution)
The difference is due to the fact the original tutorial was done with a mesh provided by tetgen. After some imrpovement of the netgen interface it became the default mesher. The new norm just wasn't updated to the documentation. Thanks for pointing this out.
The reported norm is a L2 norm of the solution vector, x=\sqrt(\sum_i^n x_i*x_i /n), and therefore different meshes may have large variations in the norm even though the distributions would be rather similar.
Peter
The reported norm is a L2 norm of the solution vector, x=\sqrt(\sum_i^n x_i*x_i /n), and therefore different meshes may have large variations in the norm even though the distributions would be rather similar.
Peter