Department of Physics Papers

Document Type

Journal Article

Date of this Version

4-20-1992

Publication Source

Physical Review Letters

Volume

68

Issue

16

Start Page

2559

Last Page

2562

DOI

10.1103/PhysRevLett.68.2559

Abstract

The mean-square displacement 〈Δr2(τ)〉 of particles in concentrated suspensions is measured at times sufficiently short to observe the transient nature of hydrodynamic interactions. For all volume fractions φ, the velocity autocorrelation function decays as a power law R(τ)∼τ−3/2. A remarkable scaling with φ is observed for the time-dependent self-diffusion coefficient Ds(τ)=〈Δr2(τ)〉/6τ: If Ds(τ) is scaled by its asymptotic value and if time is scaled by a viscous time inversely proportional to the shear viscosity of the suspension, all the data fall onto a single master curve.

Copyright/Permission Statement

© 1991 American Physical Society. You van view the original article at: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.68.2559

Comments

At the time of publication, author Douglas J. Durian was affiliated with Exxon Research and Engineering Company. Currently, he is a faculty member at the Physics Department at the University of Pennsylvania.

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Date Posted:10 October 2017

This document has been peer reviewed.