Dynamic Simulation of Shear-induced Particle Migration in a Two-dimensional Circular Couette Device  

作　　者：余钊圣 邵雪明 Roger Tanner 

机构地区：[1]Department of Nlechanics, State Key Laboratory of Fluid Pow~ Transmis~on and Control, Zhejiang University,Hangzhou 310027, China [2]School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW, 2006, Australia

出　　处：《Chinese Journal of Chemical Engineering》2007年第3期333-338,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No. 10472104）.

摘　　要：The shear-induced migration of neutrally-buoyant non-colloidal circular particles in a two-dimensional circular Couette flow is investigated numerically with a distributed Lagrange multiplier based fictitious domain method.The effects of inertia and volume fraction on the particle migration are examined.The results indicate that inertia has a negative effect on the particle migration.In consistence with the experimental observations,the rapid migration of particles near the inner cylinder at the early stage is observed in the simulation,which is believed to be related to the chain-like clustering of particles.The migration of circular particles in a plane Poiseuille flow is also examined in order to further confirm the effect of such clustering on the particle migration at early stage.There is tendency for the particles in the vicinity of outer cylinder in the Couette device to pack into concentric rings at late stage in case of high particle concentration.The shear-induced migration of neutrally-buoyant non-colloidal circular particles in a two-dimensional circular Couette flow is investigated numerically with a distributed Lagrange multiplier based fictitious domain method.The effects of inertia and volume fraction on the particle migration are examined.The results indicate that inertia has a negative effect on the particle migration.In consistence with the experimental observations,the rapid migration of particles near the inner cylinder at the early stage is observed in the simulation,which is believed to be related to the chain-like clustering of particles.The migration of circular particles in a plane Poiseuille flow is also examined in order to further confirm the effect of such clustering on the particle migration at early stage.There is tendency for the particles in the vicinity of outer cylinder in the Couette device to pack into concentric rings at late stage in case of high particle concentration.

关 键 词：shear-induced particle migration dynamic simulation circular Couette flow CLUSTERING 

分 类 号：TQ021[化学工程]