Abstract
In this paper, the entropy generation and enhancement of heat transfer in natural convection flow using Copper (Cu)-water nanofluid in the presence of an inclined magnetic field have been investigated numerically using Finite Volume Method with simple algorithm. As boundary conditions of cavity, the vertical walls are thermally insulated. Two parts of the horizontal walls are considered to be active and the remaining parts are thermally insulated. The results are presented with flow configurations, isotherms, local entropy generation due to heat transfer, local entropy generation due to fluid friction, average Bejan number, average total entropy and average Nusselt number for different values of Hartman number (0 <= Ha <= 100), Darcy number (10(-5) <= Da <= 10(-2)), magnetic field inclination angle (0 <= Phi <= pi/2), solid volume fraction (0% <= phi <= 8%), and heat generation/absorption parameter (1 <= Q <= 3). The results from this investigation are well validated and have favorable comparisons with previously published results. It is found that, an increase in the Hartmann number leads to a reduction of average Nusselt number and average total entropy whereas average Bejan number increases. The average Nusselt number and the average total entropy increase by increase either Darcy number or solid volume fraction.