Menu

Discussion Forum

New Discussion
Filtrer

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.

Comsol Solver settings for transient fully coupled FSI

Posted 5 oct. 2015, 05:42 UTC−4 0 Replies

Siva Kumar Manickam
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I have been struggling to model a transient fully coupled 2D fluid structure interaction. To start with, I tried to redo a published case. It consists of the following settings:
1. Implicit time-stepping
2. GMRES preconditioner decoupled using band matrices
3. block-matrix preordering
4. quasi-linearization
5. Discretization: spectral finite difference

I understood these settings are not selected in default by Comsol, as it uses 'direct solver'. So manually, I changed to GMRES from iterative solver settings. For time-stepping I used 'strict' instead of free. But, I am stuck hereafter.

How to add a preconditioner that too decoupled, preordered with quasi linearisation? Also, I don't know how to add spectral finite difference as discretization. I thought here some expert might see and help me.
0 Replies Last Post 5 oct. 2015, 05:42 UTC−4
COMSOL Moderator

Hello Siva Kumar Manickam

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.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content