DYNAMIC VISCOUS RESUSPENSION

被引：40

作者：

CHAPMAN, BK

LEIGHTON, DT

机构：

[1] Department of Chemical Engineering, University of Notre Dame, Notre Dame

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 1991年 / 17卷 / 04期

基金：

美国国家科学基金会;

关键词：

VISCOUS RESUSPENSION; SHEAR-INDUCED MIGRATION; HINDERED SETTLING;

D O I：

10.1016/0301-9322(91)90043-3

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The resuspension of a settled layer of particles under viscous flow conditions has been attributed to shear-induced dispersion processes arising from the interaction between particles as a suspension is sheared. Previous studies were confined to steady-state measurements of the height of a resuspending layer as a function of applied shear stress. In this paper we present dynamic measurements of the response of a suspension of negatively buoyant non-colloidal spheres to a step change in the applied shear rate. The time-dependent variation in observed viscosity is used to estimate the shear-induced effective diffusivity within the plane of shear and the hindered settling factor in sheared suspensions at concentrations between 20 and 50% by volume.

引用

页码：469 / 483

页数：15

共 18 条

[1] SELF-DIFFUSION OF BROWNIAN PARTICLES IN CONCENTRATED SUSPENSIONS UNDER SHEAR [J].