CIESC Journal

• TRANSPORT PHENOMENA & FLUID MECHANICS • 上一篇    下一篇

二维环形Couette设备中剪切引起的二维圆形固粒迁移的动态数值模拟

余钊圣a,b; 邵雪明a; R.Tannerb   

  1. a Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control,
    Zhejiang University, Hangzhou 310027, China
    b School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW,
    2006, Australia
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-28 发布日期:2007-06-28
  • 通讯作者: 余钊圣

Dynamic simulation of shear-induced particle migration in a two-dimensional circular
Couette device

YU Zhaoshenga,b; SHAO Xueminga; R.Tannerb   

  1. a Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control,
    Zhejiang University, Hangzhou 310027, China
    b School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW,
    2006, Australia
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-28 Published:2007-06-28
  • Contact: YU Zhaosheng

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.

关键词: shear-induced particle migration;dynamic simulation;circular Couette flow;clustering

Abstract: 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.

Key words: shear-induced particle migration, dynamic simulation, circular Couette flow, clustering