NUMERICAL MODELING OF MIXED CONVECTION HEAT TRANSFER OF LAMINAR FLUID IN RECTANGULAR ENCLOSURE WITH OPENINGS IN THE SIDE

Abstract

An analysis of mixed convection heat transfer inside a rectangular enclosure with side openings was numerically examined. The fluid enters the enclosure through an opening in the left vertical wall and exits from another opening placed in the right vertical wall. Two-dimensional Navier-Stockes equations are solved by using control volume based finite element technique .For mixed convection, the significant parameters are Grasfof number, Richrason number, and Reynolds number by which different fluid and heat transfer characteristics inside the enclosure are obtained. Streamlines, isotherms, average Nusselt number ,maximum temperature and other parameters of the heated wall are reported in the present study for Ri=0 to 10,Re=50,100,500,1000,Pr=0.7 to 100 and different aspect ratios. The computational results indicate that the heat transfer coefficient is strongly affected by Reynolds number and Richarson number. Higher Nusselt number is observed at large value of Pr. The comparison of the present results has been made are found in good agreement with known results.