Hydrodynamic interactions in concentrated suspensions

X. Qiu, X. L. Wu, J. Z. Xue, D. J. Pine, D. A. Weitz, P. M. Chaikin

Research output: Contribution to journalArticlepeer-review


We study the effects of hydrodynamic interactions on the diffusion of hard spheres in concentrated suspensions. Using a multiple-light-scattering technique that measures the early-time behavior, we find Deff/D0=1-(1.86±0.07), where is the volume fraction of spheres, Deff is the effective diffusion coefficient, and D0 is the free-particle diffusion coefficient. This agrees with the linear term calculated theoretically for short-time self-diffusion. The short-time diffusion coefficient is also found to be continuous across the freezing transition.

Original languageEnglish (US)
Pages (from-to)516-519
Number of pages4
JournalPhysical Review Letters
Issue number4
StatePublished - 1990

ASJC Scopus subject areas

  • General Physics and Astronomy


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