Extreme active matter at high densities

TitleExtreme active matter at high densities
Publication TypeJournal Article
Year of Publication2020
AuthorsMandal R, Bhuyan PJyoti, Chaudhuri P, Dasgupta C, Rao M
Volume11
Issue1
Pagination2581
Date Published2020/05/22
ISBN Number2041-1723
Keywordsdense active matter, dense extreme active matter, glass transition, jamming, plasticity, turbulence
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 τp → 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 τp → ∞, when as f reduces, the fluid jams at a critical point, with stresses along force-chains. For intermediate τp, 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 events result in large scale vorticity and turbulence. Dense extreme active matter brings together the physics of glass, jamming, plasticity and turbulence, in a new state of driven classical matter.

URLhttps://doi.org/10.1038/s41467-020-16130-x
Short TitleNature Communications
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