1201.6664 (Derek Frydel et al.)

Sound-mediated dynamic correlations between colloidal particles in a
quasi-one-dimensional channel    [PDF]

Derek Frydel, Haim Diamant

We study the hydrodynamic interactions between colloids suspended in a
compressible fluid inside a rigid channel. Using lattice-Boltzmann simulations
and a simplified hydrodynamic theory, we find that the diffusive dynamics of
density perturbations (sound) in the confined fluid give rise to particle
correlations of exceptionally long spatial range and slow (algebraic) temporal
decay. We examine the effect of these sound-mediated correlations on
two-particle dynamics and on the collective dynamics of a quasi-one-dimensional
suspension.

View original: http://arxiv.org/abs/1201.6664