Emergent phenomena in chiral active matter

Mecke, Joscha; Nketsiah, James Obed; Li, Ruiyao; Gao, Yongxiang

doi:10.1360/nso/20230086

NSO

2024

DOI: 10.1360/nso/20230086

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Emergent phenomena in chiral active matter

Joscha Mecke,

James Obed Nketsiah,

Ruiyao Li

et al.

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2024

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Cited by 3 publications

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Chiral active systems near a substrate: Emergent damping length controlled by fluid friction

Mecke,

Gao,

Gompper

et al. 2024

Commun Phys

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Chiral active fluids show the emergence of a turbulent behaviour characterised by multiple dynamic vortices whose maximum size varies for each experimental system, depending on conditions not yet identified. We propose and develop an approach to model the effect of friction close to a surface in a particle based hydrodynamic simulation method in two dimensions, in which the friction coefficient can be related to the system parameters and to the emergence of a damping length. This length is system dependent, limits the size of the emergent vortices, and influences other relevant system properties such as the actuated velocity, rotational diffusion, or the cutoff of the energy spectra. Comparison of simulation and experimental results of a large ensemble of rotating colloids sedimented on a surface shows a good agreement, which demonstrates the predictive capabilities of the approach, which can be applied to a wider class of quasi-two-dimensional systems with friction.

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Chiral active systems near a substrate: Emergent damping length controlled by fluid friction

Mecke,

Gao,

Gompper

et al. 2024

Commun Phys

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Spontaneous separation of attractive chiral mixtures

Li,

Guo,

2024

Phys. Rev. E

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Preface to the special topic on active matter

Ni,

Yang,

Zhang

2024

NSO

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Emergent phenomena in chiral active matter

Cited by 3 publications

References 157 publications

Chiral active systems near a substrate: Emergent damping length controlled by fluid friction

Chiral active systems near a substrate: Emergent damping length controlled by fluid friction

Spontaneous separation of attractive chiral mixtures

Preface to the special topic on active matter

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