Multiphase simulation

Vyacheslav · November 20, 2016, 08:15

Hi everyone, I need your help!
The task is multiphase simulation of air and water flow with a given law of solubility of the air in the water(depending on some field function, eg pressure). Is it possible to carry out?

Roman · November 20, 2016, 09:04

Yes! Sounds like a problem I would use VOF wave models for. However, it's hard to suggest a solution without knowing exact details of your needs and goals.

Roman

Vyacheslav · November 20, 2016, 09:17

Actually all of the details are given) For example use a pipe with a gas-liquid mixture on its inlet. Due to hydraulic losses pressure decreases along the pipe and the liauid exudes more gas. Assume the gas concentration is in inverse ratio to the pressure.

Roman · November 20, 2016, 12:13

Sounds like VOF model is the right way to go then.

Take a look at "VOF Formulation > Gas Dissolution and Cavitation Formulation" section in the Star manual to get an idea for what gas dissolution model suits your case better.

Roman

Vyacheslav · November 20, 2016, 16:40

That sounds reasonably, but where have you found Gas Dissolution and Cavitation Formulation? The only thing I managed to find is Cavitation Formulation in phase interaction models and it doesnt seem to aloud me to bring in any changes.

Roman · November 21, 2016, 01:41

In the user manual. The exact path in the manual tree is:

Code:

User Guide > Modeling Physics > Modeling Multiphase Flow > Using the VOF Multiphase Model > VOF Formulation > Gas Dissolution and Cavitation Formulation

I'm using Star-CCM+ 11.06.010

November 20, 2016, 08:15	Multiphase simulation	#1
Vyacheslav New Member Vyacheslav Join Date: Nov 2016 Posts: 3 Rep Power: 9	Hi everyone, I need your help! The task is multiphase simulation of air and water flow with a given law of solubility of the air in the water(depending on some field function, eg pressure). Is it possible to carry out?

November 20, 2016, 12:13		#4
Roman Member Roman Join Date: Mar 2011 Posts: 46 Rep Power: 15	Sounds like VOF model is the right way to go then. Take a look at "VOF Formulation > Gas Dissolution and Cavitation Formulation" section in the Star manual to get an idea for what gas dissolution model suits your case better. Roman lcarasik likes this.

November 21, 2016, 01:41		#6
Roman Member Roman Join Date: Mar 2011 Posts: 46 Rep Power: 15	In the user manual. The exact path in the manual tree is: Code: User Guide > Modeling Physics > Modeling Multiphase Flow > Using the VOF Multiphase Model > VOF Formulation > Gas Dissolution and Cavitation Formulation I'm using Star-CCM+ 11.06.010

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November 20, 2016, 09:04		#2
Roman Member Roman Join Date: Mar 2011 Posts: 46 Rep Power: 15	Yes! Sounds like a problem I would use VOF wave models for. However, it's hard to suggest a solution without knowing exact details of your needs and goals. Roman

November 20, 2016, 09:17		#3
Vyacheslav New Member Vyacheslav Join Date: Nov 2016 Posts: 3 Rep Power: 9	Actually all of the details are given) For example use a pipe with a gas-liquid mixture on its inlet. Due to hydraulic losses pressure decreases along the pipe and the liauid exudes more gas. Assume the gas concentration is in inverse ratio to the pressure.

November 20, 2016, 16:40		#5
Vyacheslav New Member Vyacheslav Join Date: Nov 2016 Posts: 3 Rep Power: 9	That sounds reasonably, but where have you found Gas Dissolution and Cavitation Formulation? The only thing I managed to find is Cavitation Formulation in phase interaction models and it doesnt seem to aloud me to bring in any changes.