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 The information provided may be out of date.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.

Fixed initial value depends on times

Please login with a confirmed email address before reporting spam

Hi all.
I have a question as following:

I am doing transient calculation on heat transfer in solid interface. Initial temperature of each domain is fixed. Heat source is decreasing by time. I want to see the hottest temperature profile when time is going on.

But, it is very strange that when I change the times from range(0,0.1,10) to range(0,10000,1000000) [under study>Step1:Time dependent> Times arrow], the initial temperature is not same with initial value in the model. Of course, the hottest temperature profile is different.

Why is that? Any ideas?

Thanks in advance!

1 Reply Last Post Nov 2, 2012, 6:05 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Nov 2, 2012, 6:05 a.m. EDT
Hi

without the model it's difficult to say,

It could be that when you change the time scale like that, the solver prepares the model differently, based on your material heat diffusivity and mesh density, I'm not sure how this is done within COMSOL, or if this is really considered

--
Good luck
Ivar
Hi without the model it's difficult to say, It could be that when you change the time scale like that, the solver prepares the model differently, based on your material heat diffusivity and mesh density, I'm not sure how this is done within COMSOL, or if this is really considered -- 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.