Calculating Surface Tension

Please login with a confirmed email address before reporting spam

Hello,

I am having an issue with calculating surface tension in two-phase level set method in 2D axisymmetric section. I have a spherical droplet and I want to calculate the surface tension (in units of Force/length). The force reported by results section is a volumetric force [N/m3]. I have tried the following so far: 1- calculated total force by surface integration (it's basically a volumetric integration as it is in 2D axisymmetric) over the entire domain. Then I divide the total force by perimeter of the projected circle and surprisngly it give me an answer with a factor of 4! So I have to divide it again by 4 to get the correct result. Wondering whai am I missing.

I appreciate your comments.

Best,


1 Reply Last Post Apr 10, 2020, 11:39 AM EDT

Please login with a confirmed email address before reporting spam

Posted: 3 months ago Apr 10, 2020, 11:39 AM EDT

Resolved by dividing the total force by sphere area 4 pi r2 and this equals the Laplace pressure 2*gamma/r which then rearrenging gives gamma=F/4piD

Resolved by dividing the total force by sphere area *4 pi r2* and this equals the Laplace pressure 2*gamma/r which then rearrenging gives gamma=F/4piD

Reply

Please read the discussion forum rules before posting.

Please log in to post a reply.

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.