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.
Geometric multigrid preconditioner to solve a 3D periodic Eigenvalue problem
Posted 12.05.2010, 22:42 GMT-4 0 Replies
Please login with a confirmed email address before reporting spam
I need to solve a large (100000 elements) 3D periodic eigenvalue problem in RF module by using iterative solvers.
Direct solvers (UMFPACK, PARDISO, SPOOLES) gave me the correct solutions for the same structure with less number of elements (below 5000 elements). So now I want to refine the mesh for several times and obtain electric field plots with higher resolution.
As mentioned in RF user's guide pp. 84, I have set GMRES, Geometric multigrid and Vanka for the linear system solver, the preconditoner, and the pre/post smoother, respectively, however I'm not doing well at all.
Could you give me advices for this problem please?
Please find the attached file.
Thank you in advance.
Yohei
Attachments:
Hello Yohei Saka
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.