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Title: Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres

Abstract

It has been suggested [D. L. Koch and E. S. G. Shaqfeh, J. Fluid Mech. {bold 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 {bold 7}, 3 (1995)]. {copyright} {ital 1996 The American Physical Society.}

Authors:
 [1]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
284539
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 76; Journal Issue: 8; Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 66 PHYSICS; SUSPENSIONS; SCREENING; HYDRODYNAMICS; CORRELATION FUNCTIONS; SIMULATION; SPHERES; MICROSTRUCTURE; VELOCITY; FLUCTUATIONS

Citation Formats

Ladd, A J. Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres. United States: N. p., 1996. Web. doi:10.1103/PhysRevLett.76.1392.
Ladd, A J. Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres. United States. doi:10.1103/PhysRevLett.76.1392.
Ladd, A J. Thu . "Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres". United States. doi:10.1103/PhysRevLett.76.1392.
@article{osti_284539,
title = {Hydrodynamic screening in sedimenting suspensions of non-Brownian spheres},
author = {Ladd, A J},
abstractNote = {It has been suggested [D. L. Koch and E. S. G. Shaqfeh, J. Fluid Mech. {bold 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 {bold 7}, 3 (1995)]. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevLett.76.1392},
journal = {Physical Review Letters},
number = 8,
volume = 76,
place = {United States},
year = {1996},
month = {2}
}