title: Irreversibility and chaos: role of long-range hydrodynamic interactions in sheared suspensions.
abstract: Non-Brownian particles suspended in an oscillatory shear flow are studied numerically. In these systems it is often assumed that chaos (due to the long-range nature of the hydrodynamic interaction between particles) plus noise (contact or roughness) lead to irreversible behavior. However, we demonstrate that the long-range hydrodynamic interactions are not a source, nor even a magnifier, of irreversibility when coupled with nonhydrodynamic interactions. Additionally, analysis reveals that the apparent anisotropy of the particle diffusion is due to coupling of the shear flow and transverse diffusion.
authors.affiliation: IUSTI-CNRS UMR 6595, Polytech'Marseille, 13453 Marseille Cedex 13, France.
authors.forename: Bloen
authors.initials: B
authors.lastname: Metzger
authors.forename: Jason E
authors.initials: JE
authors.lastname: Butler