Abstract: Mixed convection within a rectangular cavity confining a Newtonian fluid is studied analytically and numerically in thecase where the horizontal walls, whose upper one is moving, are adiabatic, whereas those vertical are submitted to uniform density offlux. Numerical calculations are carried out for values of governing parameters within the ranges, 0.1 ? Ri ? 103 , 0.1 ? Re ? 10 ,0.1 ? Pr ? 50 and A = 20, where Ri is the Richardson number, Re is the Reynolds number, Pr is the Prandtl number and A is theaspect ratio. In such a situation, the obtained results testify of a strong influence of Pr on flow and heat transfer characteristics.Key words: Heat transfer; mixed convection; lid-driven rectangular cavity.

Keywords: Heat transfer; mixed convection; lid-driven rectangular cavity.