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Abstract

The present work is carried out to investigate mixed convection heat transfer characteristic within a ventilated square cavity having a rotating circular conducting solid cylinder. Forced convection flow conditions are imposed by providing an inlet at the bottom of the left wall and an outlet vent at the top of the other side wall. Mixed convection is attained by keeping the right wall at constant heat flux condition and all other wall’s thermal conditions are considered to be adiabatic. The heat transfer characteristics and performance are analyzed at different speed ratios, different vertical positions and different diameter of the cylinder. Finite element method is adapted to carry out the numerical solution of the present problem. Effect of cylinder size, different peripheral speed ratio and location are explored for various values of Richardson numbers (0.1 <Ri<10), for different Reynolds numbers (10 ~500) and for a fixed Prandtl number (Pr = 0.7). Results are presented in terms of Streamlines, Isotherm contours, Heatlines and normalized average Nusselt number. The results indicate that that the flow field and heat transfer characteristic inside the cavity are strongly dependent on the Richardson numbers and the position, size and speed of the rotating cylinder.