Demonstration of Secondary Currents in the Pressure-Driven Flow of a Concentrated Suspension Through a Square Conduit

被引：11
|
作者：
Zrehen, Adam [1 ]
Ramachandran, Arun [1 ]
机构：
[1] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 01期
关键词：
SHEAR-INDUCED MIGRATION; NONCOLLOIDAL PARTICLES; NEWTONIAN FLUIDS; NORMAL STRESSES; DIFFUSION; RHEOLOGY; VELOCITY; SPHERES;
D O I：
10.1103/PhysRevLett.110.018306
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The existence of secondary flows in the pressure-driven flow of a concentrated suspension of noncolloidal particles through a conduit of square cross section under creeping flow conditions is confirmed experimentally. This Letter lends support to the idea that secondary currents, rather than shear- induced migration, may actually be the dominant mechanism that determines particle distribution in noncolloidal suspension flows through nonaxisymmetric geometries. This work also establishes that coextrusion of two concentrated suspensions through nonaxisymmetric geometries with a stable suspension-suspension interface is not possible, except in special situations. DOI: 10.1103/PhysRevLett.110.018306
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页数：5
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