Menu

Discussion Forum

New Discussion
Filtern

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 The information provided may be out of date.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.

Boundary conditions

Posted 07.03.2012, 03:39 GMT-5 Fluid & Heat Version 4.2a 0 Replies

Francesca Messina
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi all,

I am simulating a flow field in an annulus around a circle.
I would like to insert as boundary condition in the external circle the equation:
(1/r)*d(ur,teta)+r*d(uteta/r,r)=0 (for r = external radius of the annulus)
where r and teta are the cylindrical coordinate (that I have already inserted) and ur and uteta are the velocity component along r and teta.
Is it possible to implement an equation as boundary conditions (in the laminar flow module)?

Thanks a lot,

Francesca
0 Replies Last Post 07.03.2012, 03:39 GMT-5
COMSOL Moderator

Hello Francesca Messina

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