Numerical investigations of free and forced convection with various features using mesoscopic Lattice Boltzmann method

Abstract

This paper is concerned with the free and forced convection of heat transfer characteristics by Lattice Boltzmann method (LBM). The LBM is used as the alternative method for the prediction of fluid flow and heat transfer characteristics for the past few years. The fluid flow equation was combined with energy equation in order to get the temperature field in the flow. In natural convection problem, the motion of the fluid inside a cavity domain is considered. The motion takes place because of change in density and due to the gravitational force. The problem of natural convection and forced convection is solved using internal energy density distribution function model for Rayleigh number ranging from 103 to 106. And for the forced convection problem the Reynolds number is varied. In all the problems streamline patterns are plotted, where the intricate details of the flow such as primary and secondary vortices are captured. Thus, it is shown that Lattice Boltzmann Method can be used to solve fluid flow and heat transfer characteristics. © 2022