Extreme active matter at high densities

Rituparno Mandal, Pranab Jyoti Bhuyan, Pinaki Chaudhuri, Chandan Dasgupta and Madan Rao ()
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Rituparno Mandal: National Centre for Biological Sciences (TIFR)
Pranab Jyoti Bhuyan: Department of Physics, Indian Institute of Science
Pinaki Chaudhuri: The Institute of Mathematical Sciences
Chandan Dasgupta: Department of Physics, Indian Institute of Science
Madan Rao: National Centre for Biological Sciences (TIFR)

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: 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.

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16130-x

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DOI: 10.1038/s41467-020-16130-x

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