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hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorBICKEL, Thomas
dc.date.issued2007
dc.identifier.issn1539-3755
dc.description.abstractEnThe translational motion of a solid sphere near a deformable fluid interface is studied in the low Reynolds number regime. In this problem, the fluid flow driven by the sphere is dynamically coupled to the instantaneous conformation of the interface. Using a two-dimensional Fourier transform technique, we are able to account for the multiple backflows scattered from the interface. The correction to the mobility tensor is then obtained from the matrix elements of the relevant Green’s function. Our perturbative analysis allows us to express the explicit position and frequency dependence of the mobility for small particles. We recover in the steady limit the result for a sphere near a perfectly flat interface. At intermediate time scales, the mobility exhibits an imaginary part which is a signature of the elastic response of the interface. In the short time limit, we find that the perpendicular mobility may, under some circumstances, become lower than the bulk value. All the results can be explained using the definition of the relaxation time of the soft interface.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enHindered mobility of a particle near a soft interface
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevE.75.041403
dc.subject.halPhysique [physics]
bordeaux.journalPhysical Review E : Statistical, Nonlinear, and Soft Matter Physics
bordeaux.page9
bordeaux.volume75
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01553037
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01553037v1
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