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Gravity induced formation of spinners and polar order of spherical microswimmers on a surface

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorSHEN, Zaiyi
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorLINTUVUORI, Juho S
dc.date.issued2019-12
dc.identifier.issn2469-990X
dc.description.abstractEnWe numerically study the hydrodynamics of a self-propelled particle system, consisting of spherical squirmers sedimented on a flat surface. We observe the emergence of dynamic structures, due to the interplay of particle-particle and particle-wall hydrodynamic interactions. At low coverages, our results demonstrate the formation of small chiral spinners: two or three particles are bound together via near-field hydrodynamic interactions and form a rotating dimer or trimer respectively. The stability of the self-organised spinners can be tuned by the strength of the sedimentation. Increasing the particle concentration leads more interactions between particles and the spinners become unstable. At higher area fractions we find that pusher particles can align their swimming directions leading to a stable polar order and enhanced motility. Further, we test the stability of the polar order in the presence of a solid boundary. We observe the emergence of a particle vortex in a cylindrical confinement.
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enGravity induced formation of spinners and polar order of spherical microswimmers on a surface
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevFluids.4.123101
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
dc.subject.halPhysique [physics]/Mécanique [physics]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
dc.identifier.arxiv1905.11332
bordeaux.journalPhysical Review Fluids
bordeaux.volume4
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-02290548
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02290548v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20Fluids&rft.date=2019-12&rft.volume=4&rft.issue=12&rft.eissn=2469-990X&rft.issn=2469-990X&rft.au=SHEN,%20Zaiyi&LINTUVUORI,%20Juho%20S&rft.genre=article


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