Journal Article

FZJ-2019-05012

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Optimal motion of triangular magnetocapillary swimmers

Sukhov, A.FZJ* ; Ziegler, S. ; Xie, Q.FZJ* ; Trosman, O. ; Pande, J. ; Grosjean, G. ; Hubert, M. ; Vandewalle, N. ; Smith, A.-S. ; Harting, J. (Corresponding author)FZJ*

2019
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/23156  doi:10.1063/1.5116860

Abstract: A system of ferromagnetic particles trapped at a liquid-liquid interface and subjected to a set of magnetic fields (magnetocapillary swimmers) is studied numerically using a hybrid method combining the pseudopotential lattice Boltzmann method and the discrete element method. After investigating the equilibrium properties of a single, two, and three particles at the interface, we demonstrate a controlled motion of the swimmer formed by three particles. It shows a sharp dependence of the average center-of-mass speed on the frequency of the time-dependent external magnetic field. Inspired by experiments on magnetocapillary microswimmers, we interpret the obtained maxima of the swimmer speed by the optimal frequency centered around the characteristic relaxation time of a spherical particle. It is also shown that the frequency corresponding to the maximum speed grows and the maximum average speed decreases with increasing interparticle distances at moderate swimmer sizes. The findings of our lattice Boltzmann simulations are supported by bead-spring model calculations

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Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)
2. Dynamics of complex fluids (jiek11_20161101) (jiek11_20161101)

Appears in the scientific report 2019

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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