Flow Sim has a tutorial, but no manual.  Pity.  3 questions:

1)  Can anyone give a good definition of "pressure potential"?

I am modeling an air-cooled device w/o fans.  In modeling the slow convective flow of air:

2)  should pressure potential be checked under General Settings->Initial and Ambient Conditions->Thermodynamic Parameters ?

3)  should this be set up as turbulent-but-not-laminar?

Many thanks in advance.