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Help~~!! Two-phase in a tank

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Old   February 1, 2008, 00:16
Default Help~~!! Two-phase in a tank
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SG
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I tried to analyze a problem of tank flushing. Physical boundary Condition as follows.

1. There is pressurized air(10bar)in Upper head of tank. 2. Water and water surface are located below the pressurized air. 3. Outlet pressure condition is atmospheric pressure.

I just established whole volume of tank. Water Volume Fraction, Water initial Height, and Hydrostatic Pressure are estabished by using CEL

waterHt = 2 [m] waterDen = 997 [kh m^-3] waterVF = step((waterHt-y)/1[m]) HydroP = waterDen*g*y*waterHt

Pressure of air will be decreased accordance with ideal gad law. How can I set the condition of air?

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