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Issue 45, 2014
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Motility versus fluctuations in mixtures of self-motile and passive agents

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Abstract

Many biological systems consist of self-motile and passive agents both of which contribute to overall functionality. However, little is known about the properties of such mixtures. Here we formulate a model for mixtures of self-motile and passive agents and show that the model gives rise to three different dynamical phases: a disordered mesoturbulent phase, a polar flocking phase, and a vortical phase characterized by large-scale counter rotating vortices. We use numerical simulations to construct a phase diagram and compare the statistical properties of the different phases with observed features of self-motile bacterial suspensions. Our findings afford specific insights regarding the interaction of microorganisms and passive particles and provide novel strategic guidance for efficient technological realizations of artificial active matter.

Graphical abstract: Motility versus fluctuations in mixtures of self-motile and passive agents

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Supplementary files

Article information


Submitted
16 Jul 2014
Accepted
01 Oct 2014
First published
01 Oct 2014

Soft Matter, 2014,10, 9082-9089
Article type
Paper
Author version available

Motility versus fluctuations in mixtures of self-motile and passive agents

D. F. Hinz, A. Panchenko, T. Kim and E. Fried, Soft Matter, 2014, 10, 9082
DOI: 10.1039/C4SM01562B

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