A LB-DF/FD Method for Particle Suspensions  

作　　者：Deming Nie Jianzhong Lin 

机构地区：[1]State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027,China [2]College of Metrology and Technology Engineering,China Jiliang University,Hangzhou 310018,China

出　　处：《Communications in Computational Physics》2010年第3期544-563,共20页计算物理通讯（英文）

基　　金：This work was supported by the Scientific Project of Zhejiang Province of China(No.2008C01024-4).

摘　　要：In this paper, we propose a lattice Boltzmann (LB) method coupled with adirect-forcing fictitious domain (DF/FD) method for the simulation of particle suspensions. This method combines the good features of the LB and the DF/FD methodsby using two unrelated meshes, namely, an Eulerian mesh for the flow domain and aLagrangian mesh for the solid domain, which avoids the re-meshing procedure anddoes not need to calculate the hydrodynamic forces at each time step. The non-slipboundary condition is enforced by introducing a forcing term into the lattice Boltzmann equation, which preserves all remarkable advantages of the LBM in simulatingfluid flows. The present LB-DF/FD method has been validated by comparing its results with analytical results and previous numerical results for a single circular particleand two circular particles settling under gravity. The interaction between particle andwall, the process of drafting-kissing-tumbling (DKT) of two settling particles will bedemonstrated. As a manifestation of the efficiency of the present method, the settlingof a large number (128) of circular particles is simulated in an enclosure.

关 键 词：Lattice Boltzmann method direct-forcing fictitious domain method particle suspension numerical simulation 

分 类 号：O35[理学—流体力学]