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Bidirectional sorting of flocking particles in the presence of asymmetric barriers

Jeffrey A. Drocco, C. J. Olson Reichhardt, and C. Reichhardt

  • Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Phys. Rev. E 85, 056102 – Published 3 May, 2012

DOI: https://doi.org/10.1103/PhysRevE.85.056102

Abstract

We demonstrate numerically bidirectional sorting of flocking particles interacting with an array of V-shaped asymmetric barriers. Each particle aligns with the average swimming direction of its neighbors according to the Vicsek model and experiences additional steric interactions as well as repulsion from the fixed barriers. We show that particles preferentially localize to one side of the barrier array over time and that the direction of this rectification can be reversed by adjusting the particle-particle exclusion radius or the noise term in the equations of motion. These results provide a conceptual basis for isolation and sorting of single-cell and multicellular organisms that move collectively according to flocking-type interaction rules.

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Phys. Rev. E 85, 056102– Published 3 May, 2012
  • Received 2 November 2011

©2012 American Physical Society

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