Menu

Discussion Forum

New Discussion
Filtra

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 mode boundary form

Posted 22 set 2009, 19:19 GMT-4 0 Replies

cecilia borgonovo
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I am modelling the growth and collapse of a gas bubble due to diffusion.
my boundary condition is cs=H*pg for the diffusion equation but pg is continuously changing due to the diffusion too according to the equation:

d/dt(pg*V/RT) = area*D*dC/dr

on the boundary. my problem is that i want to express in the weak form the above equation but i have two derivative one with respect with time and the other with respect to radius of two different dependent variables.

How can I write it?

Thanks a lot guys
0 Replies Last Post 22 set 2009, 19:19 GMT-4
COMSOL Moderator

Hello cecilia borgonovo

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.

Suggested Content