Extreme active matter at high densities.

ABSTRACT: We study the remarkable behaviour of dense active matter comprising self-propelled particles at large Péclet numbers, over a range of persistence times, from τ_p → 0, when the active fluid undergoes a slowing down of density relaxations leading to a glass transition as the active propulsion force f reduces, to τ_p → ∞, when as f reduces, the fluid jams at a critical point, with stresses along force-chains. For intermediate τ_p, a decrease in f drives the fluid through an intermittent phase before dynamical arrest at low f. This intermittency is a consequence of periods of jamming followed by bursts of plastic yielding associated with Eshelby deformations. On the other hand, an increase in f leads to an increase in the burst frequency; the correlated plastic ev

SUBMITTER: Mandal R 

PROVIDER: S-EPMC7244575 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature