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Draining of a Water Tank using VOF

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Old   August 12, 2014, 06:35
Default Draining of a Water Tank using VOF
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Rayhan Ahmed
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Dear All, Hope every one is in good health. This is my 2nd post in CFD Online. I'm very much grateful to this forum and thanks to all the members of this forum.

I'm facing problem in simulating a water tank draining. Inlet is Inlet Vent, Outlet is Pressure outlet, VOF, gravity ON, Fluid Air and Water, Specified Operating Density 1.225 kg/m3. Viscous model is k epsilon.

The tank drains but I'm getting absurd contours of Volume of Fraction. Please check the attached pictures and suggest me the correct procedure.

Thank you.

Water drain.jpg
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boundary condtions, draining domain, gravity flow, multiphase model, vof modeling

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