Abstract
In this paper, the two-dimensional forced convection heat transfer of non-Newtonian power-law fluid flow between two parallel plates filled with partially porous media is studied numerically using the thermal lattice Boltzmann method (TLBM). Shear-thinning (n=0.8), Newtonian (n=1.0), and shear-thickening (n=1.2) fluid are used to investigate the non-Newtonian behavior of power-law fluids. The porous media is prepared by the arrangement of circular obstacles. The effect of Reynolds numbers between 100<Re<300 and different power indices n (0.8, 1.0, 1.2) on the fluid flow and heat transfer characteristics in the porous media are investigated. The obtained results indicated that by increment the Reynolds number, the length of vortexes and rate of heat transfer increased. Upon decrement of the power index n, the vortexes grow and reaching the maximum size at n=0.8 and Re=300. In addition, increasing the power index leads to a decrease in the rate of heat transfer.
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