Volume of Fluid - In circles

Akshay · September 28, 2015, 00:28

Hey FOAMers!

Has anyone run an industry level problem that involves the VOF approach? I'm trying to simulate one that has high momentum and I have a fine mesh to capture details. I've always had issues with time steps and resolving the interface accurately. The time step requirement drops to orders of 1e-6 and when my overall runtime is high , this can take months to solve.
I've used a lot of options like the implicit approach, playing with correctors, alpha parameters, but somehow it hasn't worked well.
Could anyone help me on this regard? Any interesting methods like a height function along with the VOF approach...or anything at all??

Thanks
Aks

nimasam · September 28, 2015, 02:53

if you are looking for steady-state solution, you may want to use LTSInterFoam which is suitable for VOF steady state problem

Akshay · September 28, 2015, 04:12

Hey Nima

I'm not looking for a steady state solution. Consider filling a tank with a high flow rate and you got crazy splashing as it fills. This is what I have. Any interesting suggestions as to how to go about it? I'm working on running with slightly higher Co numbers, controlling correctors. And for the alpha equation...sub-cycling is also considered. I'm using vanLeer for alpha conv schemes and interfaceCompression for alpharb (Henry).

September 28, 2015, 00:28	Volume of Fluid - In circles	#1
Akshay Member Akshay Kumar Join Date: Aug 2010 Location: India Posts: 84 Rep Power: 15	Hey FOAMers! Has anyone run an industry level problem that involves the VOF approach? I'm trying to simulate one that has high momentum and I have a fine mesh to capture details. I've always had issues with time steps and resolving the interface accurately. The time step requirement drops to orders of 1e-6 and when my overall runtime is high , this can take months to solve. I've used a lot of options like the implicit approach, playing with correctors, alpha parameters, but somehow it hasn't worked well. Could anyone help me on this regard? Any interesting methods like a height function along with the VOF approach...or anything at all?? Thanks Aks

September 28, 2015, 02:53		#2
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,266 Blog Entries: 1 Rep Power: 24	if you are looking for steady-state solution, you may want to use LTSInterFoam which is suitable for VOF steady state problem __________________ My Personal Website (http://nimasamkhaniani.ir/) Telegram channel (https://t.me/cfd_foam)

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September 28, 2015, 04:12		#3
Akshay Member Akshay Kumar Join Date: Aug 2010 Location: India Posts: 84 Rep Power: 15	Hey Nima I'm not looking for a steady state solution. Consider filling a tank with a high flow rate and you got crazy splashing as it fills. This is what I have. Any interesting suggestions as to how to go about it? I'm working on running with slightly higher Co numbers, controlling correctors. And for the alpha equation...sub-cycling is also considered. I'm using vanLeer for alpha conv schemes and interfaceCompression for alpharb (Henry).