bubble separator device

amin.z · November 16, 2014, 12:15

hey friends!
I need your suggestions!
I'm working on a bubble separator System!
in this device, air and jet of water enter to a tube, then due to buoyancy force, air bubbles separate from water!
based on your experience, which multiphase model do you suggest for my problem!? VoF or mixture or...?

ghost82 · November 16, 2014, 12:24

Hi,
I would suggest mixture/eulerian if air > 10% volume fraction (mixture less computationally expensive than eulerian, and maybe more stable, but maybe less accurate), vof if you want to study water/air interfaces.
Discrete phase model if air <= 10%.

amin.z · November 16, 2014, 12:53

Tnx my dear friend!
I think volume fraction of air is more than 20%
in my model, air bubbles are floating in the water and due to buoyancy force, they move upward! so both of fluid have interaction
therefore what is your suggestion!?

ghost82 · November 16, 2014, 12:54

I would go for Eulerian. If stability will be a problem switch to mixture.

amin.z · November 16, 2014, 12:57

Quote:

Originally Posted by ghost82

I would go for Eulerian. If stability will be a problem switch to mixture.

thank you so much!

November 16, 2014, 12:15	bubble separator device	#1
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	hey friends! I need your suggestions! I'm working on a bubble separator System! in this device, air and jet of water enter to a tube, then due to buoyancy force, air bubbles separate from water! based on your experience, which multiphase model do you suggest for my problem!? VoF or mixture or...?

November 16, 2014, 12:24		#2
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 26	Hi, I would suggest mixture/eulerian if air > 10% volume fraction (mixture less computationally expensive than eulerian, and maybe more stable, but maybe less accurate), vof if you want to study water/air interfaces. Discrete phase model if air <= 10%. __________________ Google is your friend and the same for the search button!

November 16, 2014, 12:54		#4
ghost82 Senior Member Rick Join Date: Oct 2010 Posts: 1,016 Rep Power: 26	I would go for Eulerian. If stability will be a problem switch to mixture. __________________ Google is your friend and the same for the search button!

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November 16, 2014, 12:53		#3
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 14	Tnx my dear friend! I think volume fraction of air is more than 20% in my model, air bubbles are floating in the water and due to buoyancy force, they move upward! so both of fluid have interaction therefore what is your suggestion!?