Generic Long-Range Interactions between Passive Bodies in an Active Fluid

Yongjoo Baek; Alexandre P. Solon; Xinpeng Xu; Nikolai Nikola; Yariv Kafri

doi:10.1103/PhysRevLett.120.058002

Generic Long-Range Interactions between Passive Bodies in an Active Fluid

Yongjoo Baek, Alexandre P. Solon, Xinpeng Xu, Nikolai Nikola, Yariv Kafri

Physics

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

A single nonspherical body placed in an active fluid generates currents via breaking of time-reversal symmetry. We show that, when two or more passive bodies are placed in an active fluid, these currents lead to long-range interactions. Using a multipole expansion, we characterize their leading-order behaviors in terms of single-body properties and show that they decay as a power law with the distance between the bodies, are anisotropic, and do not obey an action-reaction principle. The interactions lead to rich dynamics of the bodies, illustrated by the spontaneous synchronized rotation of pinned nonchiral bodies and the formation of traveling bound pairs. The occurrence of these phenomena depends on tunable properties of the bodies, thus opening new possibilities for self-assembly mediated by active fluids.

Original language	English
Article number	058002
Journal	Physical Review Letters
Volume	120
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.120.058002
State	Published - 31 Jan 2018

Access to Document

10.1103/PhysRevLett.120.058002

Cite this

@article{87700a9afa654d74baba9d082f7e2a71,

title = "Generic Long-Range Interactions between Passive Bodies in an Active Fluid",

abstract = "A single nonspherical body placed in an active fluid generates currents via breaking of time-reversal symmetry. We show that, when two or more passive bodies are placed in an active fluid, these currents lead to long-range interactions. Using a multipole expansion, we characterize their leading-order behaviors in terms of single-body properties and show that they decay as a power law with the distance between the bodies, are anisotropic, and do not obey an action-reaction principle. The interactions lead to rich dynamics of the bodies, illustrated by the spontaneous synchronized rotation of pinned nonchiral bodies and the formation of traveling bound pairs. The occurrence of these phenomena depends on tunable properties of the bodies, thus opening new possibilities for self-assembly mediated by active fluids.",

author = "Yongjoo Baek and Solon, {Alexandre P.} and Xinpeng Xu and Nikolai Nikola and Yariv Kafri",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = jan,

day = "31",

doi = "10.1103/PhysRevLett.120.058002",

language = "英语",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Generic Long-Range Interactions between Passive Bodies in an Active Fluid

AU - Baek, Yongjoo

AU - Solon, Alexandre P.

AU - Xu, Xinpeng

AU - Nikola, Nikolai

AU - Kafri, Yariv

PY - 2018/1/31

Y1 - 2018/1/31

N2 - A single nonspherical body placed in an active fluid generates currents via breaking of time-reversal symmetry. We show that, when two or more passive bodies are placed in an active fluid, these currents lead to long-range interactions. Using a multipole expansion, we characterize their leading-order behaviors in terms of single-body properties and show that they decay as a power law with the distance between the bodies, are anisotropic, and do not obey an action-reaction principle. The interactions lead to rich dynamics of the bodies, illustrated by the spontaneous synchronized rotation of pinned nonchiral bodies and the formation of traveling bound pairs. The occurrence of these phenomena depends on tunable properties of the bodies, thus opening new possibilities for self-assembly mediated by active fluids.

AB - A single nonspherical body placed in an active fluid generates currents via breaking of time-reversal symmetry. We show that, when two or more passive bodies are placed in an active fluid, these currents lead to long-range interactions. Using a multipole expansion, we characterize their leading-order behaviors in terms of single-body properties and show that they decay as a power law with the distance between the bodies, are anisotropic, and do not obey an action-reaction principle. The interactions lead to rich dynamics of the bodies, illustrated by the spontaneous synchronized rotation of pinned nonchiral bodies and the formation of traveling bound pairs. The occurrence of these phenomena depends on tunable properties of the bodies, thus opening new possibilities for self-assembly mediated by active fluids.

UR - http://www.scopus.com/inward/record.url?scp=85041354894&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.058002

DO - 10.1103/PhysRevLett.120.058002

M3 - 文章

C2 - 29481190

AN - SCOPUS:85041354894

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 5

M1 - 058002

ER -

Generic Long-Range Interactions between Passive Bodies in an Active Fluid

Abstract

Access to Document

Other files and links

Fingerprint

Cite this