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.

Capillary pressure

Please login with a confirmed email address before reporting spam

Hello!

I'm trying to simulate sessile droplet deformation with taking into account capillary pressure. To calculate capillary pressure I use Weak Form Boundary PDE which defines the curvature radius of droplet surface. Boundary PDE contains normal vectors nr and nz (cylindrical system). In this way I can estimate capillary pressure on the surface, but can't to take it into account since, obviously, nr and nz can't be defined in the volume.

The question is: How to take into account the capillary pressure inside the drop volume?

P.s. I can't just add Boundary Force for selected surface, since I use "Two Phase Fluid Flow, Moving Mash" module for both drop volume and surrounding air. Maybe I can apply Divergence Theorem somehow?..


0 Replies Last Post 2020年4月13日 GMT-4 07:22
COMSOL Moderator

Hello олег чирс

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.