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arXiv · 1901.10567

Intermittent "Turbulence" in a Many-body System

Guram Gogia·Wentao Yu·Justin C. Burton
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Abstract

In natural settings, intermittent dynamics are ubiquitous and often arise from a coupling between external driving and spatial heterogeneities. A well-known example is the generation of transient, turbulent puffs of fluid through a pipe with rough walls. Here we show how similar dynamics can emerge in a discrete, crystalline system of particles driven by noise. Polydispersity in particle masses leads to localized vibrational modes that effectuate a transition to a gas-like phase. A minimal model for the evolution of the system's mechanical energies exhibits quasi-cyclic oscillations, and a single, dimensionless number captures the essential features of the intermittent dynamics, analogous to the Reynolds number for pipe flow.

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Guram Gogia, Wentao Yu, Justin C. Burton. 2019-01-29. Intermittent "Turbulence" in a Many-body System. https://doi.org/10.1103/physrevresearch.2.023250

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