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Lattice-Boltzmann hydrodynamics of anisotropic active matter

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posted on 07.12.2018, 15:12 authored by Joost de Graaf, Henri Menke, Arnold J.T.M. Mathijssen, Marc Fabritius, Christian Holm, Tyler Shendruk
A plethora of active matter models exist that describe the behavior of self-propelled particles (or swimmers), both with and without hydrodynamics. However, there are few studies that consider shape-anisotropic swimmers and include hydrodynamic interactions. Here, we introduce a simple method to simulate self-propelled colloids interacting hydrodynamically in a viscous medium using the lattice-Boltzmann technique. Our model is based on raspberry-type viscous coupling and a force/counter-force formalism, which ensures that the system is force free. We consider several anisotropic shapes and characterize their hydrodynamic multipolar flow field. We demonstrate that shape-anisotropy can lead to the presence of a strong quadrupole and octupole moments, in addition to the principle dipole moment. The ability to simulate and characterize these higher-order moments will prove crucial for understanding the behavior of model swimmers in confining geometries

Funding

J.d.G. acknowledges financial support by a NWO Rubicon Grant (No. #680501210). J.d.G. and C.H. thank the DFG Reuse of AIP Publishing content is subject to the terms: https://publishing.aip.org/authors/rights-and-permissions. Downloaded to IP: 163.1.246.64 On: Fri, 08 Apr 2016 08:46:55 134106-9 de Graaf et al. J. Chem. Phys. 144, 134106 (2016) for funding through the SPP 1726 “Microswimmers—From Single Particle Motion to Collective Behavior.” A.J.T.M.M. and T.N.S. acknowledge financial support from an ERC Advanced Grant MiCE (No. 291234). T.N.S. thanks EMBO for funding through (No. ALTF181-2013)

History

School

  • Science

Department

  • Mathematical Sciences

Published in

The Journal of Chemical Physics

Volume

144

Issue

13

Pages

134106 - 134106

Citation

DE GRAAF, J. ... et al.,2016. Lattice-Boltzmann hydrodynamics of anisotropic active matter. The Journal of Chemical Physics, 144: 134106.

Publisher

© AIP

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

01/04/2016

Publication date

2016-04-07

Notes

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in DE GRAAF, J. ... et al.,2016. Lattice-Boltzmann hydrodynamics of anisotropic active matter. The Journal of Chemical Physics, 144: 134106 and may be found at https://doi.org/10.1063/1.4944962.

ISSN

0021-9606

eISSN

1089-7690

Language

en

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