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-   -   Semi-implicit scheme for VOF (http://www.cfd-online.com/Forums/main/97154-semi-implicit-scheme-vof.html)

phoenixchen903 February 9, 2012 23:15

Semi-implicit scheme for VOF
 
Hi, every one,

I'm working on vof. In some papers, semi-implicit scheme (Crank-Nicolson scheme) was applied for temporal evolution, like in HRIC-related paper or FLUENT.

Are there anybody have experientces on it - How can I estimate the VOF flux on the cell surface at time level "n+1"?

Thank you very much.

rmh26 February 11, 2012 12:48

You could try to get a predicted VOF field at n+1 using and Adams Bashforth method. I do similar work and for now have just been using the current VOF for the n+1 VOF when solving the NS equations in the semi implicit (Adams Bashforth-Crank Nicholsen) form.
The prediction part can be iffy near the interface though if you are experiencing spurious currents.

phoenixchen903 February 11, 2012 22:18

Thanks a lot! I'll study it.

Quote:

Originally Posted by rmh26 (Post 343944)
You could try to get a predicted VOF field at n+1 using and Adams Bashforth method. I do similar work and for now have just been using the current VOF for the n+1 VOF when solving the NS equations in the semi implicit (Adams Bashforth-Crank Nicholsen) form.
The prediction part can be iffy near the interface though if you are experiencing spurious currents.



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