[chiven]

First, I shall use FOAM to simulate the steady-state single-phase natural circulation flow. (the following work will be two-phase) Transient calculations are performed to obtain steady-state flow fields.
The problem is that I am wondering which standard solver I should select among "turbFoam", "rhoTurbFoam" and "buoyantFoam". For the "turbFoam", I need to add the energy conservation equation. For the "rhoTurbFoam" and "buoyantFoam", I need to set the density as a constant. And I also don't know what is the difference between "rhoTurbFoam" and "buoyantFoam".

If you have some experiences on the solvers of "turbFoam", "rhoTurbFoam" and "buoyantFoam" or some experieces on solving this kind of problems. Would you please give me some comments?

Any comments are appreciated. Thank you in advance.