Segregation of a fine suspension in channel flow

Citation
Ya. Buyevich et Sk. Kapbsov, Segregation of a fine suspension in channel flow, J NON-NEWT, 86(1-2), 1999, pp. 157-184
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Mechanical Engineering
Journal title
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
ISSN journal
03770257 → ACNP
Volume
86
Issue
1-2
Year of publication
1999
Pages
157 - 184
Database
ISI
SICI code
0377-0257(19990915)86:1-2<157:SOAFSI>2.0.ZU;2-E
Abstract
This paper deals with three related problems. First, we consider the effect ive viscosity of a neutrally-buoyant concentrated Brownian suspension of id entical hard spheres with allowance for shear-thinning of the suspension, a nd we also formulate a set of mean normal stresses due to particle thermal and shear-induced fluctuations. Secondly, the effect of these stresses on p article distribution in suspension flow is modeled, the resultant model bei ng verified by comparing its predictions with particle concentration profil es experimentally found for rotational Couette flow. Thirdly, the model is applied to suspension flow in plane and cylindrical where the lateral segre gation of particles affects the hydraulic flow characteristics to quite a c onsiderable extent by making them essentially non-Newtonian. The theoretica l results are compared with experimental evidence available for steady flow of non-Brownian suspensions. (C) 1999 Elsevier Science B.V. All rights res erved.