Mixed convection in an open lid-driven cavity attached with a rectangular channel

In this study, a numerical simulation is carried out investigation the mixed convection in an open lid _driven wall cavity attached to horizontal rectangular channel. Three different cases were considered depending on direction of moving sidewalls cavity. case(1), no walls assumed ; While for case (case 2) left sidewall moves downward, (case3) both and right are downward. A comparative case( case1) accounted when side hand stationary. The heat source with length (ε=1) which located bottom maintained at constant temperature. working fluid air cold temperature fixed velocity entered channel horizontally. All other adiabatic. finite element method by used COMSOL Modelling Software solve governing equations.The study effects Richardson numbers (Ri=0.1-100) movement cavity, Reynolds ratio(Rer=1-5) aspect ratio(AR=1-2).The results presented form contours isothermal, average Nusselt that, downward leads accelerate pass over hot more energy thus increase (Nuav) improves transfer lid-driven cavity.The maximum value verage number (Ri=100) all cases. Also, it was found, that (AR) has significant impact flow fields achieved.