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Old   October 29, 2012, 13:50
Default Pressure outlet boundary condition
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Peter
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I am trying to reproduce a two-phase simulation performed in Fluent. The problem is a two phase flow in a circular duct. At the inlet I have specified the velocity. Originally at the duct exit I specified outflow boundary conditions as:

P = 0

\frac{\partial u}{\partial z} = 0

However I believe that the correct boundary conditions should be pressure outlet, not outflow. Mathematically, how is pressure outlet defined?
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