Menu

Discussion Forum

New Discussion
Filter

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 The information provided may be out of date.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.

Time-dependent problem-convergence issues

Posted Feb 8, 2012, 6:32 p.m. EST Fluid & Heat, Studies & Solvers Version 4.2 1 Reply

Sirisha Govindaraju
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I am working on a time-dependent FSI problem. The problem converges well when I model the solid as a linear elastic material. However I end up with convergence issues and inverted mesh elements when I use a hyperelastic material model to represent the solid.

I am wondering if someone can explain why this is happening and how do I fix this?

Thanks,
Sirisha
1 Reply Last Post Feb 9, 2012, 6:24 p.m. EST
Sirisha Govindaraju
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Feb 9, 2012, 6:24 p.m. EST
I tried running the problem with the solid modeled as a linear elastic material and I also selected the geometric non-linearity option. I am getting inverted mesh elements even in this case.

I am wondering if someone can suggest some basic reasons as to why this is happening only when the hyperelastic material is used (or when the non-linearity option is selected).

Thanks for the help.

Sirisha
I tried running the problem with the solid modeled as a linear elastic material and I also selected the geometric non-linearity option. I am getting inverted mesh elements even in this case. I am wondering if someone can suggest some basic reasons as to why this is happening only when the hyperelastic material is used (or when the non-linearity option is selected). Thanks for the help. Sirisha

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