Degenerate states, emergent dynamics and fluid mixing by magnetic rotors

doi:10.1039/d0sm00454e

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Degenerate states, emergent dynamics and fluid mixing by magnetic rotors
	Kawai, Takuma ; Matsunaga, Daiki ; Meng, Fanlong 3,4; Yeomans, Julia M.; Golestanian, Ramin 2,4
刊名	SOFT MATTER
	2020
卷号	16 期号:28 页码:6484-6492
ISSN号	1744-683X
DOI	10.1039/d0sm00454e
英文摘要	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.
学科主题	Chemistry ; Materials Science ; Physics ; Polymer Science
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27207]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Max Planck Inst Dynam & Self Org MPIDS, D-37077 Gottingen, Germany 2.Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan 3.Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 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.