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Fluctuations and correlations during the shear flow of elastic particles near the jamming transition (1001.0658v2)

Published 5 Jan 2010 in cond-mat.mtrl-sci, cond-mat.soft, and cond-mat.stat-mech

Abstract: We present a numerical study of the flow of an assembly of frictionless soft discs at zero temperature, in the vicinity of and slightly above the jamming density. We find that some of the flow properties, such as the fluctuations in the number of contacts or the shear modulus, display a critical like behaviour that is governed by the proximity to the jamming point. Dynamical correlations during a quasistatic deformation, however, are non critical and dominated by system size. At finite strain rates, these dynamical correlations acquire a finite, strain-rate dependent amplitude, that decreases when approaching the jamming point from above.

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