Advise about solver choice
 

Hi, everyone

I would like to simulate the injection of heat gas into a cavity at ambient temperature. Moreover this cavity has one outlet. This flow features following :
-2D/3D flow
-Newtonian fluid
-Turbulent flow
-Ideal gas (heat and cool air)
-Transient flow
- Low Mach (<0.3) but we have to consider a variable density, because it varies with the temperature.
-The solver has to solve the energy equation

Could you tell me what is the solver the most appropriate to simulate this problem. I though about buoyantPisoFoam, but I am not sure. If everyone can confirm my choice or purpose me a better idea, it will be wonderful.
thx