Velocity fluctuations and hydrodynamic diffusion in sedimentation

Details Velocity fluctuations and hydrodynamic diffusion in sedimentation Velocity fluctuations and hydrodynamic diffusion in sedimentation

2001-01-24

arxiv.org/abs/cond-mat/0101366v1

Europhys. Lett. 54, 45 (2001).

Physics

Condensed Matter

Statistical Mechanics

7 pages, 5 EPS figures, EPL style

Scientific paper

We study non-equilibrium velocity fluctuations in a model for the sedimentation of non-Brownian particles experiencing long-range hydrodynamic interactions. The complex behavior of these fluctuations, the outcome of the collective dynamics of the particles, exhibits many of the features observed in sedimentation experiments. In addition, our model predicts a final relaxation to an anisotropic (hydrodynamic) diffusive state that could be observed in experiments performed over longer time ranges.

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