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Emergence of Lanes and Turbulent-like Motion in Active Spinner Fluid

Journal Article · · Communications Physics
 [1];  [2];  [3]
  1. Northwestern Univ., Evanston, IL (United States); Pennsylvania State University
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. Northwestern Univ., Evanston, IL (United States)
Assemblies of self-rotating particles are gaining interest as a novel realization of active matter with unique collective behaviors such as edge currents and non-trivial dynamic states. Here, we develop a continuum model for a system of fluid-embedded spinners by coarse-graining the equations of motion of the discrete particles. We apply the model to explore mixtures of clockwise and counterclockwise rotating spinners. We find that the dynamics is sensitive to fluid inertia: in the inertialess system, after transient turbulent-like motion the spinners segregate and form steady traffic lanes. At small but finite Reynolds number instead, the turbulent-like motion persists and the system exhibits a chirality breaking transition leading to a single rotation sense state. Our results shed light on the dynamic behavior of non-equilibrium materials exemplified by active spinners.
Research Organization:
Northwestern Univ., Evanston, IL (United States); Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0020964
OSTI ID:
1776822
Alternate ID(s):
OSTI ID: 1853687
Journal Information:
Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 4; ISSN 2399-3650
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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