Long-range dynamic correlations in confined suspensions

Derek Frydel*, Haim Diamant

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Hydrodynamic interactions between particles confined in a liquid-filled linear channel are known to be screened beyond a distance comparable to the channel width. Using a simple analytical theory and lattice Boltzmann simulations, we show that the hydrodynamic screening is qualitatively modified when the time-dependent response and finite compressibility of the host liquid are taken into account. Diffusive compression modes in the confined liquid cause the particles to have velocity correlations of unbounded range, whose amplitude decays with time only as t-3/2.

Original languageEnglish
Article number248302
JournalPhysical Review Letters
Volume104
Issue number24
DOIs
StatePublished - 17 Jun 2010

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