Hydrodynamic Irreversibility in Particle Suspensions with Non-Uniform Strain

Details Hydrodynamic Irreversibility in Particle Suspensions with Non-Uniform Strain Hydrodynamic Irreversibility in Particle Suspensions with Non-Uniform Strain

2010-03-04

arxiv.org/abs/1003.1121v1

Physics

Fluid Dynamics

Scientific paper

A dynamical phase transition from reversible to irreversible behavior occurs when particle suspensions are subjected to uniform oscillatory shear, even in the Stokes flow limit. We consider a more general situation with non-uniform strain (e.g. oscillatory channel flow), which is observed to exhibit markedly different dynamics. Self-organization and shear-induced migration only partially explain the delayed, simultaneous onset of irreversibility across the channel. The onset of irreversibility is accompanied by long-range correlated particle motion. This motion leads to particle activity even at the channel center, where the strain is negligible, and prevents the system from evolving into a reversible state.

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