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 The information provided may be out of date.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.

weak form PDE

Siva Mahesh Tangutooru

Please login with a confirmed email address before reporting spam

Can anyone help me solve a differential equation (solve for x) using time dependent weak form boundary PDE module. The equation is dx/dt = a(1-x)-b(x). I tried to write expressions x_test*(a*(1-x)-b*x) in weak form PDE and the expression x_test*x_time in weak contribution steps. I dont know if it is right or not. I also tried to change the expressions test(x)*(a*(1-x)-b*x) and test(x)*d(x,t) instead of above two. I have values for a and b. I appreciate your help.

0 Replies Last Post 19 mars 2014, 12:02 UTC−4
COMSOL Moderator

Hello Siva Mahesh Tangutooru

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.