Semi-implicit scheme for VOF

phoenixchen903 · February 9, 2012, 22:15

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, 11:48

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, 21:18

Thanks a lot! I'll study it.

Quote:

Originally Posted by rmh26

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.

February 9, 2012, 22:15	Semi-implicit scheme for VOF	#1
phoenixchen903 New Member Join Date: Mar 2009 Posts: 6 Rep Power: 17	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.

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February 11, 2012, 11:48		#2
rmh26 Member Join Date: Jul 2011 Posts: 59 Rep Power: 14	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.