Stabilization of active matter by flow-vortex lattices and defect ordering

Amin Doostmohammadi (), Michael F. Adamer, Sumesh P. Thampi and Julia M. Yeomans
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Amin Doostmohammadi: The Rudolf Peierls Centre for Theoretical Physics
Michael F. Adamer: The Rudolf Peierls Centre for Theoretical Physics
Sumesh P. Thampi: The Rudolf Peierls Centre for Theoretical Physics
Julia M. Yeomans: The Rudolf Peierls Centre for Theoretical Physics

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Active systems, from bacterial suspensions to cellular monolayers, are continuously driven out of equilibrium by local injection of energy from their constituent elements and exhibit turbulent-like and chaotic patterns. Here we demonstrate both theoretically and through numerical simulations, that the crossover between wet active systems, whose behaviour is dominated by hydrodynamics, and dry active matter where any flow is screened, can be achieved by using friction as a control parameter. Moreover, we discover unexpected vortex ordering at this wet–dry crossover. We show that the self organization of vortices into lattices is accompanied by the spatial ordering of topological defects leading to active crystal-like structures. The emergence of vortex lattices, which leads to the positional ordering of topological defects, suggests potential applications in the design and control of active materials.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10557

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DOI: 10.1038/ncomms10557

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