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 The information provided may be out of date.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.

convergence problem.

Posted Jan 18, 2011, 9:00 a.m. EST Fluid & Heat Version 3.5a 1 Reply

Byungdal So
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

this is free convection model,

but I don't know why this model does not converge.

do you guys have any idea?

thank you

Attachments:

1 Reply Last Post Jan 18, 2011, 4:26 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Jan 18, 2011, 4:26 p.m. EST
Hi

I'm not a CFD specialist, but you have a singularity at the lower left corner of your model:

Two adjacent BC's with two different temperatures.

Perhaps you sould leave a small region with thermal isolation down there at least 2-3 mesh elements wide or height, horizontally or vertically

I cannot see anything else obvious for me ;)

--
Good luck
Ivar
Hi I'm not a CFD specialist, but you have a singularity at the lower left corner of your model: Two adjacent BC's with two different temperatures. Perhaps you sould leave a small region with thermal isolation down there at least 2-3 mesh elements wide or height, horizontally or vertically I cannot see anything else obvious for me ;) -- Good luck Ivar

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