Performance Analysis of Mixed Convection in T-Shaped Geometry for Entropy Generation Using Lattice Boltzmann Method

The present work focuses on solving differentially heated top lid driven T-shaped cavity for three different velocities which experience mixed convection using the Lattice Boltzmann method. The behavior of streamlines, isotherms, and entropy generation maps are extensively studied taking three fluids namely air (Pr = 0.71), ammonia (Pr = 1.38), and water (Pr = 6.13) for three different cases of Ri = 0.1, Ri = 1, and Ri = 10. Richardson number and Prandtl number were found to be greatly influential on the fluid flow and heat diffusion inside the cavity. It was found that increasing Prandtl number increases the average Nusselt number while increasing the Richardson number decreases the average Nusselt number. The entropy generation was seen to be more concentrated at a few locations near the wall since the entropy generation due to temperature difference is more prominent than the entropy generation due to viscous dissipation.