Numerical investigation of two dimensional natural convection and entropy generation inside a porous square enclosure with sinusoidally heated wall Online publication date: Sat, 05-Mar-2016
by Prashant Meshram; Saurabh Bhardwaj; Amaresh Dalal
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 16, No. 2, 2016
Abstract: In this paper, effect of sinusoidal heating on natural convection heat transfer and fluid flow has been studied in two dimensional square cavity saturated with porous medium. The governing equations have been formulated using Darcy-Forchheimer model and Boussinesq approximation. Finite volume method has been used to solve the governing equation. Computations are done for the wide range of Rayleigh number, Ra = 103 − 106 and Darcy number, Da = 105 − 103 considering air (Pr = 0.71) as working fluid. In this analysis, it is observed that in the presence of sinusoidal heating of the bottom wall, transition from conduction to convection mode of heat transfer occurs at 104 ≤ Ra ≤ 105. It is also found that at high Ra and high Da, fluid friction irreversibility dominates the heat transfer irreversibility in the cavity and the maximum entropy generation is found for Da = 103 and Ra = 106 in this parameteric study.
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