Abstract:
Jet impingement configuration is commonly employed in the thermal management of the gas turbine engines,
rocket launchers, and high-density electrical equipment cooling to remove a large amount of heat. Owing to such
overwhelming applications, significant research efforts have been devoted to enhance the cooling performance of
jet impingement configuration. In this work, the influence of shear-thinning behaviour in overall heat transfer
characteristics have been investigated as a function of pertinent dimensionless numbers as 10− 6 ≤ Da ≤ 10− 2
(Darcy number), 1 ≤ Pe ≤ 102 (P´eclet number), 0 ≤ Ri ≤ 4 (Richardson number), 0.4 ≤ n ≤ 1 (shear-thinning
index). The numerical results on local thermal non-equilibrium (LTNE) parameter, streamlines and isotherms,
local and average Nusselt number are reported for a range of power-law index, PA˜©clet number and Richardson
number. All in all, shear-thinning fluids offer 50–60% enhancement in Nusselt number with reference to the
Newtonian fluid at a higher Darcy number. A correlation for average Nusselt number is put forward to enable its
use for process design calculations
