LINTUVUORI, Juho S; WÜRGER, Aloïs; STRATFORD, K.

doi:10.1103/PhysRevLett.119.068001

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LINTUVUORI, Juho S
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

WÜRGER, Aloïs
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

STRATFORD, K.
EPCC [Edinburgh]

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Ce document a été publié dans

Physical Review Letters. 2017-08-11, vol. 119, n° 6, p. 068001 (1-6)

American Physical Society

Résumé en anglais

We present a study of the hydrodynamics of an active particle, a model squirmer, in an envi- ronment with a broken rotational symmetry: a nematic liquid crystal. By combining simulations with analytic calculations, we show that the hydrodynamic coupling between the squirmer flow field and liquid crystalline director can lead to re-orientation of the swimmers. The preferred orientation depends on the exact details of the squirmer flow field. In a steady state, pushers are shown to swim parallel with the nematic director while pullers swim perpendicular to the nematic director. This behaviour arises solely from hydrodynamic coupling between the squirmer flow field and anisotropic viscosities of the host fluid. Our results suggest that an anisotropic swimming medium can be used to characterise and guide spherical microswimmers in the bulk.< Réduire

DOI

http://dx.doi.org/10.1103/PhysRevLett.119.068001

Project ANR

Effets thermoélectriques à l'échelle nano - ANR-13-IS04-0003
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

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Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798