Dissipation and velocity distribution at the shear-driven jamming transition

Peter Olsson
Phys. Rev. E 93, 042614 – Published 28 April 2016

Abstract

We investigate energy dissipation and the distribution of particle velocities at the jamming transition for overdamped shear-driven frictionless disks in two dimensions at zero temperature. We find that the dissipation is caused by the fastest particles and that the fraction of particles responsible for the dissipation decreases towards zero as jamming is approached. These particles belong to an algebraic tail of the velocity distribution that approaches v3 as jamming is approached. We further find that different measures of the velocity diverge differently, which means that concepts such as typical velocity may no longer be used, a finding that should have implications for analytical approaches to shear-driven jamming.

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  • Received 10 August 2015
  • Revised 15 April 2016

DOI:https://doi.org/10.1103/PhysRevE.93.042614

©2016 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Peter Olsson

  • Department of Physics, Umeå University, 901 87 Umeå, Sweden

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Issue

Vol. 93, Iss. 4 — April 2016

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