Reply To: Free surface boundary conditions
1/ I would use a Smagorisky model in combination with BGK. For the free flow, I would set a Pressure BC (=Direchlet Zero for Pressure, Neumann Zero for Velocity).
1/ I would use a Smagorisky model in combination with BGK. For the free flow, I would set a Pressure BC (=Direchlet Zero for Pressure, Neumann Zero for Velocity).