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 The information provided may be out of date.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.

How to define a "temperature history-dependent" material property?

Please login with a confirmed email address before reporting spam

Hi,

I am trying to define a temperature(T) dependent electrical conductivity(sigma) which works like

25<T<=100, sigma=0.5+0.02*T
T>100, sigma=0.001 (there's a huge drop of sigma at T=100)

My question is how I can make the sigma remains as low as 0.001 once the temperature is ever over 100 and won't rise back even if the temperature drops to below 100. So it is not purely temperature dependent but also "history dependent."

I can use the smoothing function to smooth the dramatic change around T~100, so the non-linearity is not a problem here.

Any thoughts and suggestions are welcomed.

Thanks.

0 Replies Last Post 25 oct. 2011, 01:36 UTC−4
COMSOL Moderator

Hello Roland Chen

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.