充满金属泡沫的方腔自然对流数值模拟

NUMERICAL SIMULATION OF NATURAL CONVECTION WITH METAL FOAMS

本文使用格子-Boltzmann方法模拟了充满金属泡沫的封闭方腔自然对流.通过构建适用于上下边界绝热,左右边界恒定温度的封闭方腔自然对流的双分布函数热模型,模拟了充满不同孔隙率和不同孔密度的金属泡沫,在不同Ra数下的封闭方腔自然对流,结果表明金属泡沫具有强化传热的作用,并随着Ra数和孔密度的增大,换热增强.

A double distribution thermal lattice boltzmann model presented in this paper is to simulate natural convection with metal foams of different porosity, hole density and Rayleigh number. It can be seen that the metal foams can enhance the heat transfer. With the increase of Rayleigh number and hole density, the quality of heat exchanging increases.