Mixed Convection in Square Cavity with Constant Heat Source on the Bottom Wall and Isothermal Sidewalls Moving in Opposite Directions

Laminar mixed convection in a square cavity, with a heat source located on the horizontal bottom wall and two vertical isothermal sidewalls moving in opposite directions, is numerically investigated. The heat source represents a heater or an electronic component, located at the bottom in such an enclosure. The influence of reversal of the direction of movement of the side walls (mixed convection contrary) with Richardson number, on the heat transfer in the cavity, is described by the Nüsselt number. Results are obtained for several values of the Richardson number Ri (0.1 to 10) with a Prandtl number Pr = 0.71 at Re =100. Different heat source lengths with different positions are considered.