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.
2D FSI Failed to evaluate reaction forces
Posted 21.05.2019, 05:45 GMT-4 MEMS & Piezoelectric Devices, Microfluidics Version 5.3 0 Replies
Please login with a confirmed email address before reporting spam
Hi I'm performing a microfluidic FSI: 4us analysis
Error: Failed to evaluate reaction forces
COMSOL version 5.3
(See attached geometry and input)
This is what comes out from my time dependent analysis of a layered vibrating membrane, with prescribed displacement of 0.5um, over a fluid chamber, following a rectangle wave. I'm using Generalized alpha solver, 0.001 relative tollerace +0.1 tolerance factor, fully coupled + Automatic Newton, strict time stepping:
range(0,1e-7,7e-7)range(7.4e-7,1e-9,3.4e-6)range(3.5e-6,1e-8,4e-6)
The error comes out after the first ramp, around 1.7 us ( i tried a lot of configurations, at most I reached 1.9 us).
Any suggestions? Thanks in advance.
Attachments:
Hello Jacopo Musumeci
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.