Menu

Discussion Forum

New Discussion
Filtern

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 solver can not converge (Last time step is not converged)

Posted 10.11.2021, 17:43 GMT-5 Fluid & Heat, Heat Transfer & Phase Change, Heat Transfer 0 Replies

Mahdi Momeni
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi,

I am using the Heat Transfer module, coupled with Fluid Flow to simulate air and water flow in a specific heat exchanger. I have used a step function for the inlet velocities of air and water to smooth the initial values for convergence. However, at a specific time step (where the velocity step function is about to go up), the model would not converge and I get the error of "maximum number of intermediate iterations reached, last time step is not converged". I have tried different mesh qualities but this problem always occurs. Can anyone help what I can do in this condition?

Thanks, Mahdi

0 Replies Last Post 10.11.2021, 17:43 GMT-5
COMSOL Moderator

Hello Mahdi Momeni

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