Fluctuations and correlations during the shear flow of elastic particles near the jamming transition

Details Fluctuations and correlations during the shear flow of elastic particles near the jamming transition Fluctuations and correlations during the shear flow of elastic particles near the jamming transition

2010-01-05

arxiv.org/abs/1001.0658v2

Soft Matter 6, 3050 (2010)

Physics

Condensed Matter

Materials Science

Manuscript submitted to the themed Issue on granular and jammed materials of Soft Matter

Scientific paper

10.1039/b927228c

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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