Virtual Investigation of Plume Behavior from a Heated EccentricAnnulus Cylinder

摘要

In this paper, a double-population thermal lattice Boltzmann was applied to solve two dimensional, incompressible, thermal fluid flow problem. The simplest lattice BGK D2Q4 model was applied to determine the temperature field while D2Q9 for the density and velocity fields. The simulation of natural convection from a concentrically and eccentrically placed inner heated cylinder inside cold outer cylinder with Prandtl number 0.71 and Rayleigh number 5 x 105 were carried out and discussed quantitatively. It was observed that the combination of D2Q4 and D2Q9 was able to reproduce the effect of buoyancy force in the system and excellent comparisons with previous studies.