turbulent buoyant plume

Theo

Hi

I'm trying to simulate the evolution of a buoyancy plume and I wonder which model I should use. The configuration is the following : a light fluid (fresh water) is injected into a tank filled with a heavier fluid (salt water). Both fluids have the same temperature. Should I used a Multiphase model or is there a way to define a mass flow inlet at a specificc density ?

Thanks

Theo