用Lattice Boltzmann方法模拟陶瓷过滤器基体内的流体流动.pdfVIP

Lattice Boltzmann Simulation on Flow in Porous Medium of Ceramic Filter 1 Meiyu Sun, Zhongli Ji*, Honghai Chen Dept. of Mechanical and Electrical Engineering, China University of Petroleum, Beijing, China, 102249 Email: jizhongli63@ Abstract The lattice Boltzmann method (LBM) is applied to simulate three dimensional flows through ceramic matrixes. The simplified structures are generated randomly by computer. As a test of the lattice Boltzmann code, the relation between pressure drop and superficial velocity in porous medium is obtained which agrees well with Darcy’s Law. Local velocities of different pores are also analyzed. The velocity distributions are approximate to parabolas. Calculation results show that the Darcy number increases along quadric curves with the increase of sphere diameter and porosity. Keywords: Ceramic Filter Media, Lattice Boltzmann Method, Three dimensional Flow, Simulation. 1 Introduction So far, ceramic filter is considered to be one of the most promising equipments for hot gas cleaning [1]. At present, extensive researches have been carried out into the performances of ceramic filters [2-5], but most of these researches focus on experimental or macroscopical aspects. Microscopical phenomenon in ceramic matrix is not investigated adequately. In fact, the macroscopic flow characteristics are determined by microscopic properties. For better understanding of dust filtration process in ceramic filter, it is nec