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how can i set up flow over an aiship with buoyant force?

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Old   August 20, 2011, 04:19
Default how can i set up flow over an aiship with buoyant force?
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i have a problem that how can i set up flow over an airship with buoyant force?
which kind of turbulent model is good for this problem?
should i apply pressure on farfield boundary condition as a function of height( z direction)?( P=P0+rho*g*(z-z0))
if i scale down my model the solution is correct or not?
should i enable enrgy equation in navier-stoks for this problem?
velocity flow over the airship is aproximately 100 km/hr.
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