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Calculating Surface Tension

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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 2020年4月10日 GMT-4 11:39

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Posted: 4 years ago 2020年4月10日 GMT-4 11:39

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

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