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 The information provided may be out of date.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.

Problem of the boundary condition at bubble surface

Please login with a confirmed email address before reporting spam

Hi,
I'm now trying to use N-S and continuity equations to calculate the drag cofficient of spherical bubbles.
I use the PDE and 2D axisymmetric model module to simulate. when setting the boundary condition of zero shear stress at bubble surface, I encounter a problem that the boundary condition is "t.T.n=0"as shown in the image.
I wonder if someone knows how to transform this condition so that it can be used in comsol.
I've shown my idea in the image and I'm very pleased if someone gives me any idea about this topic.
Thank you very much.


0 Replies Last Post Nov 19, 2014, 9:55 p.m. EST
COMSOL Moderator

Hello 奇滨 诸

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.