zavid |
March 7, 2012 11:53 |
Proper boundary conditions
Dear CFX users,
I faced a problem in setting boundary conditions of a pure free convection problem. A box has two openings: one is located at higher elevation and another is located lower. Just guess the cavity flow with two openings. My question is, What should be the boundary condition at those openings? I set opening (entrainment) boundary conditions with zero relative pressure and 25C static temperature (ambient). But my adviser said its wrong. He said that I should not set any temperature and pressure at those openings. It might be calculated from the internal flow. Anyway as I know, we set pressure and temperature at the opening as the ambient conditions. If anyone has better experience, please kindly share. Thanks.
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