COMPETITION BETWEEN LID DRIVEN AND NATURAL CONVECTION IN SQUARE CAVITY: LATTICE BOLTZMANN METHOD

摘要: A lattice Boltzmann method is developed to investigate a situation combining natural and forced convection for lid driven, in two-dimensional square cavity over much wider range of Rayleigh (Ra) Reynolds (Re) numbers. The features dynamic thermal fields are presented different Ra Re explain the role Richardson number (Ri) mixed convection. Effects on flow heat transfer discussed both cases cooperating opposing effects. Within scope this study, predictive formulas obtained describe terms relationship between average Nusselt (Nu) controlling parameters. Different from LBGK approximation, moment LB model applied work.