Three-phase bubble column problem

filipemt · May 20, 2014, 22:36

Hi Everybody,

I am trying to simulate a three-fluid model (water, air and oil above). First I tried the case only with water and air and I had good results. However, when I inserted the oil above the water it was not phisically valid, with the volume of oil continuously increasing even using degassing condition.
Can someone please help on this?

Thanks in advance,

Filipe.

ghorrocks · May 21, 2014, 08:32

Please post an image of what you are modelling and the CCL.

filipemt · May 21, 2014, 18:16

The files are attached!
The two-phase image is physically correct, but the three-phase not (0s, 2s and 6s are represented).

Thanks for the patience!

three-phase 0s oil VOF.jpg

two-phase.jpg

three-phase 2s oil VOF.jpg

three-phase 6s oil VOF.jpg

panela.txt

ghorrocks · May 21, 2014, 19:43

Are you sure you are adequately converged?

filipemt · May 21, 2014, 20:40

I think so.. Do you think it could be a convergence problem?

May 20, 2014, 22:36	Three-phase bubble column problem	#1
filipemt New Member Filipe de Menezes Join Date: Feb 2012 Posts: 12 Rep Power: 14	Hi Everybody, I am trying to simulate a three-fluid model (water, air and oil above). First I tried the case only with water and air and I had good results. However, when I inserted the oil above the water it was not phisically valid, with the volume of oil continuously increasing even using degassing condition. Can someone please help on this? Thanks in advance, Filipe.

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May 21, 2014, 08:32		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Please post an image of what you are modelling and the CCL.

May 21, 2014, 18:16		#3
filipemt New Member Filipe de Menezes Join Date: Feb 2012 Posts: 12 Rep Power: 14	The files are attached! The two-phase image is physically correct, but the three-phase not (0s, 2s and 6s are represented). Thanks for the patience! three-phase 0s oil VOF.jpg two-phase.jpg three-phase 2s oil VOF.jpg three-phase 6s oil VOF.jpg panela.txt

May 21, 2014, 19:43		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Are you sure you are adequately converged?

May 21, 2014, 20:40		#5
filipemt New Member Filipe de Menezes Join Date: Feb 2012 Posts: 12 Rep Power: 14	I think so.. Do you think it could be a convergence problem?