CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   Surface Tension term in two phase flows (http://www.cfd-online.com/Forums/main/13327-surface-tension-term-two-phase-flows.html)

 Soghrat April 17, 2007 10:46

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,

 CFDtoy April 20, 2007 12:28

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

 isabel July 7, 2009 10:20

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

 All times are GMT -4. The time now is 08:48.