Segregation of a fine suspension in channel flow

被引:25
作者
Buyevich, YA
Kapbsov, SK
机构
[1] Univ Calif Santa Barbara, CRSS, Goleta, CA 93117 USA
[2] Karaganda State Univ, Karaganda 470070, Kazakhstan
关键词
suspension rheology; shear-induced fluctuations; particle segregation; Couette and channel suspension flows;
D O I
10.1016/S0377-0257(98)00207-9
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
This paper deals with three related problems. First, we consider the effective viscosity of a neutrally-buoyant concentrated Brownian suspension of identical hard spheres with allowance for shear-thinning of the suspension, and we also formulate a set of mean normal stresses due to particle thermal and shear-induced fluctuations. Secondly, the effect of these stresses on particle distribution in suspension flow is modeled, the resultant model being verified by comparing its predictions with particle concentration profiles experimentally found for rotational Couette flow. Thirdly, the model is applied to suspension flow in plane and cylindrical where the lateral segregation of particles affects the hydraulic flow characteristics to quite a considerable extent by making them essentially non-Newtonian. The theoretical results are compared with experimental evidence available for steady flow of non-Brownian suspensions. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
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页码:157 / 184
页数:28
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