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.

Joule heating model having spurious and negative temperatures

Please login with a confirmed email address before reporting spam

This is a result of Joule heating model, where two electrods are heating the medium in between. I got spurious and negative temperatures. Below is a zoomed in view of the temperature. Any idea why that happens?



1 Reply Last Post 1 lug 2021, 11:50 GMT-4
Robert Koslover Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 3 years ago 1 lug 2021, 11:50 GMT-4
Updated: 3 years ago 1 lug 2021, 14:28 GMT-4

I don't really know, but considering the hazy block-like shading that I can see in the blue parts of the zoomed view, it sure looks to me like you may not have nearly a fine enough mesh in the volume(s) right around the sources of heat. You might want to modify that and try again. Your mesh need to be fine enough to capture the details of the gradient in temperature.

Added: Consider posting your .mph file to the forum.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I don't really know, but considering the hazy block-like shading that I can see in the blue parts of the zoomed view, it sure looks to me like you may not have nearly a fine enough mesh in the volume(s) right around the sources of heat. You might want to modify that and try again. Your mesh need to be fine enough to capture the details of the gradient in temperature. Added: Consider posting your .mph file to the forum.

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.