SHEN, Zaiyi; LINTUVUORI, Juho S.

doi:10.1103/PhysRevLett.130.188202

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SHEN, Zaiyi
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
State Key Laboratory for Turbulence and Complex Systems [Beijing]

LINTUVUORI, Juho S.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Article de revue

Ce document a été publié dans

Physical Review Letters. 2023, vol. 130, n° 18, p. 188202

American Physical Society

Résumé en anglais

Hydrodynamic interactions can give rise to a collective motion of rotating particles. This, in turn, can lead to coherent fluid flows. Using large scale hydrodynamic simulations, we study the coupling between these two in spinner monolayers at weakly inertial regime. We observe an instability, where the initially uniform particle layer separates into particle void and particle rich areas. The particle void region corresponds to a fluid vortex, and it is driven by a surrounding spinner edge current. We show that the instability originates from a hydrodynamic lift force between the particle and fluid flows. The cavitation can be tuned by the strength of the collective flows. It is suppressed when the spinners are confined by a no-slip surface, and multiple cavity and oscillating cavity states are observed when the particle concentration is reduced.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevLett.130.188202

Project ANR

Guidage des particules artificielles auto-propulsées - ANR-19-CE06-0012

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Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798