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Immersed Boundary Simulations of Active Fluid Droplets

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  • Carl A Whitfield
  • Rhoda J Hawkins

Abstract

We present numerical simulations of active fluid droplets immersed in an external fluid in 2-dimensions using an Immersed Boundary method to simulate the fluid droplet interface as a Lagrangian mesh. We present results from two example systems, firstly an active isotropic fluid boundary consisting of particles that can bind and unbind from the interface and generate surface tension gradients through active contractility. Secondly, a droplet filled with an active polar fluid with homeotropic anchoring at the droplet interface. These two systems demonstrate spontaneous symmetry breaking and steady state dynamics resembling cell motility and division and show complex feedback mechanisms with minimal degrees of freedom. The simulations outlined here will be useful for quantifying the wide range of dynamics observable in these active systems and modelling the effects of confinement in a consistent and adaptable way.

Suggested Citation

  • Carl A Whitfield & Rhoda J Hawkins, 2016. "Immersed Boundary Simulations of Active Fluid Droplets," PLOS ONE, Public Library of Science, vol. 11(9), pages 1-30, September.
    • Handle: RePEc:plo:pone00:0162474
    DOI: 10.1371/journal.pone.0162474
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    References listed on IDEAS

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    1. Tim Sanchez & Daniel T. N. Chen & Stephen J. DeCamp & Michael Heymann & Zvonimir Dogic, 2012. "Spontaneous motion in hierarchically assembled active matter," Nature, Nature, vol. 491(7424), pages 431-434, November.
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