Extreme active matter at high densities.
Title | Extreme active matter at high densities. |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Mandal R, Bhuyan PJyoti, Chaudhuri P, Dasgupta C, Rao M |
Journal | Nat Commun |
Volume | 11 |
Issue | 1 |
Pagination | 2581 |
Date Published | 2020 May 22 |
ISSN | 2041-1723 |
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 → 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 → ∞, when as f reduces, the fluid jams at a critical point, with stresses along force-chains. For intermediate τ, 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. |
DOI | 10.1038/s41467-020-16130-x |
Alternate Journal | Nat Commun |
PubMed ID | 32444608 |
PubMed Central ID | PMC7244575 |
Grant List | IUSSTF-JC-026-2016 / / Indo-US Science and Technology Forum (IUSSTF) / |