自然对流多孔介质(金属)用晶格玻尔兹曼方法加快的数值研究

A thermal lattice BGK model with doubled populations is proposed to simulate the two-dimensional natural

convection flow in porous media (porous metals). The accuracy of this method is validated by the

benchmark solutions. The detailed flow and heat transfer at the pore level are revealed. The effects of

pore density (cell size) and porosity on the natural convection are examined. Also the effect of porous

media configuration (shape) on natural convection is investigated. The results showed that the overall

heat transfer will be enhanced by lowering the porosity and cell size. The square porous medium can

have a higher heat transfer performance than spheres due to the strong flow mixing and more surface

area.