Contribution to Improving the Performance of a Wind Turbine Using Natural Convection

Natural Convection in a vertical channel with internal objects is en- countered in several technological applications, among them particular interest of heat dissipation from electronic circuits, refrigerators, heat exchangers, nuclear re- actors fuel elements, dry cooling towers, home ventilation, etc. This numerical study deals with the study of natural convection in a vertical convergent channel with a circular block. The considered parameters are 10 4 Ra 10 6 , Prandtl number Pr = 0:71, channel height 10 A 30, inclination angle of the channel j = 0; 2:86 0 ; 5:74 0 . The size block conductivity and the block radius are assumed to be constant L = 100, R = 0; 1 respectively. The Nusselt number and the mass flow rate are correlated with Rayleigh number. Further, the maximum kinetic en- ergy (DVmax) is also evaluated.

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