Surface Tension term in two phase flows
 

Hi,

I am simulating two phase flow using the level set method (finite volume).

I have some problems in descretizing the surface tension term. Could anyone help me to find a descretized surface tension term? I do not how to descretize it correctly.

Thanks,

Re: Surface Tension term in two phase flows
 

Compute gradient of volume fraction function to evaluate curvature

k=-grad (n) where n is the normal vector which is then =

n = - (grad C) / abs(grad C) where C is the color VOF function.

This is easily computed within the FV framework.

Then force term in source F = sigma*k

Hope this helps

CFDtoy

force term in source would be F = sigma*k*(grad C)