ITP OpenIR  > SCI期刊论文
Kawai, Takuma; Matsunaga, Daiki; Meng, Fanlong2,3; Yeomans, Julia M.; Golestanian, Ramin1,3
Degenerate states, emergent dynamics and fluid mixing by magnetic rotors
Source PublicationSOFT MATTER
AbstractWe 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.
Cooperation Status国际
Subject AreaChemistry ; Materials Science ; Physics ; Polymer Science
MOST Discipline CatalogueChemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science
Indexed BySCIE
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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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