Pressure effect in a differentially heated square cavity

Our purpose is to study the effects of the pressure work forces on natural convection in a square cavity, with numerical simulations using a 2D compressible model. The results obtained show the pressure effect in the energy balance for two cases, the first one under a microgravity field and the other one with very low differences of temperature. We show as well that advanced assumptions must be avoided without preliminary sensibility tests in the numerical simulations of natural convection flows.