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 The information provided may be out of date.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.

Rotating boundary in fluid flow problem

Please login with a confirmed email address before reporting spam

Hi,

I am quite new to Comsol and am trying to model the stationary fluid flow around a rotating circle within a rectangle. I'm a bit unsure of how to speicfiy the rotating boundary condition upon the internal circle. I've tried defining the angular velcoity as two parameters and speicifying this as the boundary velocity; U_x = -(sqrt(x^2+y^2)RPMsin(atand(y/x))) U_y = (sqrt(x^2+y^2)RPMcos(atand(y/x))) Any help is much apperciated.

Thanks, Dónal



0 Replies Last Post 2019年2月2日 GMT-5 08:59
COMSOL Moderator

Hello Donal Murphy

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.