Abstract
We investigate numerically the heat transfer and fluid flow characteristics inside a wavy walled enclosure. Second law of thermodynamics is also applied to predict the nature of irreversibility in terms of entropy generation. Finite-volume method is used to discretize the governing differential equations with non-staggered variable arrangement. SIP (strongly implicit procedure) solver solves the linear equation systems with full multigrid (FMG) acceleration. Simulation was carried out for a range of wave ratio (defined by amplitude/average width) λ=0.0–0.4, aspect ratio (defined by height/average width) A=1.0–2.0, Rayleigh number Ra=10 0–10 7 for a fluid having Prandtl number equal to 0.7. The angle of inclination ( θ) is varied from 0° to 360° with 15° interval. Streamlines and isothermal lines represent the corresponding flow and thermal fields. Local and global Nusselt number distributions express the rate of heat transfer. Contour of Bejan number is plotted. Volume averaged entropy generation rate is also presented.
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