Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres

被引：114

作者：

Ladd, AJC

机构：

[1] Lawrence Livermore National Laboratory, Livermore, CA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.76.1392

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It has been suggested [D. L. Koch and E. S. G. Shaqfeh, J. Fluid Mech. 224, 275 (1991)] that the long-range hydrodynamic interactions in sedimenting suspensions of non-Brownian spheres are screened by changes in the pair correlation function. However, a large-scale numerical simulation, using more than 32000 spheres, with full many-body hydrodynamic interactions, has found no evidence of the predicted changes in suspension microstructure. The absence of hydrodynamic screening in the simulations is shown to lead to divergent velocity fluctuations, in disagreement with recent experimental results [H. Nicolai and E. Guazzelli, Phys. Fluids 7, 3 (1995)].

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页码：1392 / 1395

页数：4

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