关键词:

陶瓷过滤管, 格子Boltzmann方法, 并行计算, 多孔介质

Abstract:

Comparing with conventional CFD methods, the lattice Boltzmann method (LBM) is a more efficient approach to deal with flows in complex structures, such as porous media.Moreover, it is an ideal tool for parallel processing. LBM was used to simulate gas flow through ceramic filter.Two kinds of filters were analyzed, one was the filter without membrane, the other was the membrane filter.Porous media structures for simulation were generated based on scanning electron microscope images of the ceramic filter tube.For the small time scale and small spatial scale in this issue, huge calculation load was inevitable.In order to fulfill these requirements, parallel computing was used.For the ceramic filter without membrane, the velocity and pressure in pores under different conditions were analyzed, and the influence of pore structure on velocity was observed.The flow through the ceramic filter with membrane was also simulated.It is concluded that the pressure drop through the membrane accounts for a large percentage of the filter’s total pressure drop.

Key words:

陶瓷过滤管, 格子Boltzmann方法, 并行计算, 多孔介质