SRT-LBM Numerical Simulation of Nanofluid Natural Convection Heat Transfer in a Square Cavity with Constant Heat Flux Applied to Partial Walls

Abstract

The double-population lattice Boltzmann method, coupling the density and temperature distribution functions with nine speeds, is used to simulate heat transfer by convection within a square cavity filled with an Al₂O₃-water nanofluid, with a constant heat flux on the vertical walls. This study analyzes the influence of the Rayleigh number, nanoparticle volume fraction, and source length on the natural convection heat transfer of the nanofluid. Numerical results show that the flow and heat transfer characteristics of the Al₂O₃-water nanofluid in the square cavity are particularly sensitive to these parameters.