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Gas Separation on Multiphase tower

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Old   November 4, 2019, 23:14
Default Gas Separation on Multiphase tower
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Charles
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All,
Good Day. I have a problem that i am trying to solve and i would really appreciate some ideas.

I am new to Ansys Fluent(few months old). I have the problem attached picture. This is a vertical 15m column with two separate vertical sections meshed together with a wall in between as shown

1) Water and Air are injected into the domain at known volume rates. Here i have used "Mass" Inflow as my boundary inlet conditions

2). Water and air leaks into another column which transports vertically to outlet at 4

3) Gas is removed from a Gas cap or gas filled domain section which according to our experiment stays almost constant . This gas section we have been measuring moves 1 or 2mtr at maximum during the experiment. For (3), i have used the "Degassing" boundary outlet

4) This section, we are collecting both water and air into another tank(tank not modelled here), here in my domain i have used a "Pressure" boundary outlet

My problem:
I have created a flow domain, describing the below, the air volume from (3) is nothing compared with our experiments.

According to our experiments, we are injecting about 50,000scf/d of air at (1) and are measuring about 30,000scf/d of air at (3) while the rest goes with the water to (4).

Please does anyone have any ideas on a better method of modelling this ?
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File Type: gif Multiphase Tower.GIF (30.4 KB, 8 views)
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Old   November 5, 2019, 12:14
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kindly go through this. This might help in deciding the multiphase model.

https://www.afs.enea.it/project/nept...ug/node718.htm
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