Large Eddy Simulation of turbulent natural convection in an inclined tall cavity

Abstract

To a better understanding of buoyancy-driven flows in enclosed tall cavity, Large Eddy Simulations are performed with an original solver, which combines fourth-order compact scheme and parallel computing. The direct numerical simulation of the natural convection flow between two heated parallel plates are provided to validate the present numerical method. Then, the mean and turbulent statistics of the buoyancy-driven in a tall cavity at the moderate Rayleigh number are computed. The results of the vertical configuration flow are successfully compared with the available experimental data. Then, the statistics are discussed with respect to the inclination angle of the tall cavity. Especially, the occurrence of convection rolls in the cavity inclined to the horizontal is shown, as well as their roles in the deterioration of the thermal stratification.