Wall shear rate distribution for flow in random sphere packings

被引：3
|
作者：
Warren, Patrick B. [1 ]
Stepanek, Frantisek [2 ]
机构：
[1] Unilever R&D Port Sunlight, Wirral CH63 3JW, Merseyside, England
[2] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.100.084501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The wall shear rate distribution P(gamma) is investigated for pressure-driven Stokes flow through random arrangements of spheres at packing fractions 0.1 <=phi <= 0.64. For dense packings, P(gamma) is monotonic and approximately exponential. As phi -> 0.1, P(gamma) picks up additional structure which corresponds to the flow around isolated spheres, for which an exact result can be obtained. A simple expression for the mean wall shear rate is presented, based on a force-balance argument.
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页数：4
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