Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Iterative solver and gauge fixing
Posted 30.03.2011, 13:30 GMT-4 Low-Frequency Electromagnetics, Studies & Solvers Version 3.5a, Version 4.1 4 Replies
Please login with a confirmed email address before reporting spam
I sincerely hope you are all doing fine. Could you be so kind to advise me on the following issue, please?
The problem I have is quite an ordinary induction current problem in 3D with a stranded conductor of almost zero conductivity. I have managed to get a great solution with COMSOL, while enforcing the gauge fixing and using the direct solver. But when I am changing the solver to iterative one (due to fine mesh for example), I am not able to get a solution anymore, even with the Vanka preconditioner -- it keeps saying me that there are zeros on the diagonal of a submatrix needed for the SSOR update in the Vanka algorithm. Could you be so kind to help me with it, please?
Thank you very very much for your help, and have a beautiful day!
With best wishes,
Dima
Hello Dmitry Lazutkin
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.