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.

引用

页数：4

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