Degenerate states, emergent dynamics and fluid mixing by magnetic rotors

doi:10.1039/d0sm00454e

ITP OpenIR > SCI期刊论文

	Kawai, Takuma ; Matsunaga, Daiki ; Meng, Fanlong2,3 ; Yeomans, Julia M.; Golestanian, Ramin 1,3
	Degenerate states, emergent dynamics and fluid mixing by magnetic rotors
Source Publication	SOFT MATTER
Language	英语
Abstract	We investigate the collective motion of magnetic rotors suspended in a viscous fluid under a uniform rotating magnetic field. The rotors are positioned on a square lattice, and low Reynolds hydrodynamics is assumed. For a 3 x 3 array of magnets, we observe three characteristic dynamical patterns as the external field strength is varied: a synchronized pattern, an oscillating pattern, and a chessboard pattern. The relative stability of these depends on the competition between the energy due to the external magnetic field and the energy of the magnetic dipole-dipole interactions among the rotors. We argue that the chessboard pattern can be understood as an alternation in the stability of two degenerate states, characterized by striped and spin-ice configurations, as the applied magnetic field rotates. For larger arrays, we observe propagation of slip waves that are similar to metachronal waves. The rotor arrays have potential as microfluidic devices that can mix fluids and create vortices of different sizes.
	2020
ISSN	1744-683X
Volume	16 Issue:28 Pages:6484-6492
Cooperation Status	国际
Subject Area	Chemistry ; Materials Science ; Physics ; Polymer Science
MOST Discipline Catalogue	Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science
DOI	10.1039/d0sm00454e
Indexed By	SCIE
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.itp.ac.cn/handle/311006/27207
Collection	SCI期刊论文
Affiliation	1.Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan 2.Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Max Planck Inst Dynam & Self Org MPIDS, D-37077 Gottingen, Germany
Recommended Citation GB/T 7714	Kawai, Takuma,Matsunaga, Daiki,Meng, Fanlong,et al. Degenerate states, emergent dynamics and fluid mixing by magnetic rotors[J]. SOFT MATTER,2020,16(28):6484-6492.
APA	Kawai, Takuma,Matsunaga, Daiki,Meng, Fanlong,Yeomans, Julia M.,&Golestanian, Ramin.(2020).Degenerate states, emergent dynamics and fluid mixing by magnetic rotors.SOFT MATTER,16(28),6484-6492.
MLA	Kawai, Takuma,et al."Degenerate states, emergent dynamics and fluid mixing by magnetic rotors".SOFT MATTER 16.28(2020):6484-6492.

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