Menu

Discussion Forum

New Discussion
Filter

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.

step function in 3.5

Posted Apr 5, 2011, 5:19 a.m. EDT Parameters, Variables, & Functions, Studies & Solvers 2 Replies

Toru Okada
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello!
How can i give as a heat source a step input.
In particular, i want my heat source to go to zero after some time but i cannot find the step function.
thanks
2 Replies Last Post Apr 5, 2011, 6:53 a.m. EDT
Edgar Kaiser
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Apr 5, 2011, 5:42 a.m. EDT
Hi,

you can use something like Q*(t<t0). Q is the heat source, t0 is the switch-off time. This is a sharp step. If you want to smooth the step, use the flsmhs function. It is in the documentation.

Cheers
Edgar
Hi, you can use something like Q*(t
Toru Okada
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Apr 5, 2011, 6:53 a.m. EDT
thanks, i wanted the sharp one!
thanks, i wanted the sharp one!

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