Temporally heterogeneous dynamics in granular flows

Details Temporally heterogeneous dynamics in granular flows Temporally heterogeneous dynamics in granular flows

2005-01-26

arxiv.org/abs/cond-mat/0501617v1

Physics

Condensed Matter

Soft Condensed Matter

Under review PRL, 4 pages + 9 .eps figures

Scientific paper

10.1103/PhysRevLett.94.098002

Granular simulations are used to probe the particle scale dynamics at short, intermediate, and long time scales for gravity driven, dense granular flows down an inclined plane. On approach to the angle of repose, where motion ceases, the dynamics become intermittent over intermediate times, with strong temporal correlations between particle motions -- temporally heterogeneous dynamics. This intermittency is characterised through large scale structural events whereby the contact network periodically spans the system. A characteristic time scale associated with these processes increases as the stopped state is approached. These features are discussed in the context of the dynamics of supercooled liquids near the glass transition.

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