Mohammad EFTEKHARI YAZDI, Mahdi MOEMEN

Natural Convection in a Square Cavity Using Lattice Boltzmann Method for numbers Riley less than 10^6

Abstract. Since the phenomenon of free convection in a closed container, have a lot of engineering applications.The heat transfer in solar collectors, Equipment designed for cooling, heat transfer in double-glazed windows and applications of this branch of engineering optimization problems.therefore for The analysis easier and more practical for such applications in this paper, the cavity is filled up with air and water would have to rely on Lattice Boltzmann Method simulation. Results for the basis fluid, air and water are provided. In this paper, the Pacific and the four Rayleigh number (Ra =10^3, 10^4,10^ 5, 10 ^ 6) is presented.Single-phase method was used to solve this fluid flow.The main objective of the present study is demonstrate the ability of Lattice Boltzmann Method for solving fluid flow in the long cavity.Lattice Boltzmann results with previous work has been validated.This results have a good agreement with the results of earlier studies.Boundary conditions in the shield to wall upper and lower is adiabatic,and wall of the left and right is temperature constant.

Keywords:

Natural Convection Heat Transfer Lattice Boltzmann Method, Cavity,

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