Numerical Analysis of Natural Convection in a Closed Cavity with Partition Using Thermal Lattice BoltzmannMethod

In this work, the natural convection in a partitioned cavity using thermal lattice Boltzmann method is discussed. Velocity and temperature distributions as well as Nusselt numbers were obtained for the Rayleigh numbers ranging from 103 to 106 with the Prandtl number around 0.718 for air. This study examines the effect of different Rayleigh numbers on the cavity heat transfer and flow patterns. Results are presented in the form of streamline and isotherm plots as well as the variation of average Nusselt number at the isothermal walls and compared with the established CFD tools and experimental data referenced through literature. The streamlines show as the Rayleigh number increase, the flow rate toward partitioned enclosure increase and as the Rayleigh number increase, the average Nusselt number at the isothermal walls of partitioned cavity increase and the average Nusselt umber at the isothermal walls is increased as the aspect ratio decreased.