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.

Changing Coordinate system using weak form PDE

Please login with a confirmed email address before reporting spam

Hello,
I'm using the Weak form PDE tool. I'm trying to sole a problem in 2D Polar Coordinate System. I have rewritten my problem in this coordinates system and under "Definition" I have selected the Cylindrical System. So the independent variables should be "r" and "phi". But comes out this error:
"Undefined variable.
- Variable: r
- Geometry: geom1
- Domain: 1
- Feature: Time-Dependent Solver 1 (sol1/t1)"
I think it comes out from the weak form of the PDE equations which are written using r and phi as variable.
Why it doesn't recognizes r and phi as variable?

Thanks in advance.
Andrea

0 Replies Last Post 08.05.2015, 07:10 GMT-4
COMSOL Moderator

Hello Andrea Cugno

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.