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Stretching and squeezing of sessile dielectric drops by the optical radiation pressure

hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
hal.structure.identifierTransferts, écoulements, fluides, énergétique [TREFLE]
dc.contributor.authorCHRAIBI, Hamza
hal.structure.identifierTransferts, écoulements, fluides, énergétique [TREFLE]
dc.contributor.authorLASSEUX, Didier
hal.structure.identifierTransferts, écoulements, fluides, énergétique [TREFLE]
dc.contributor.authorARQUIS, Eric
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorWUNENBURGER, Régis
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorDELVILLE, Jean-Pierre
dc.date.created2007-12-17
dc.date.issued2008-06-17
dc.identifier.issn1539-3755
dc.description.abstractEnWe study numerically the deformation of sessile dielectric drops immersed in a second fluid when submitted to the optical radiation pressure of a continuous Gaussian laser wave. Both drop stretching and drop squeezing are investigated at steady state where capillary effects balance the optical radiation pressure. A boundary integral method is implemented to solve the axisymmetric Stokes flow in the two fluids. In the stretching case, we find that the drop shape goes from prolate to near-conical for increasing optical radiation pressure whatever the drop to beam radius ratio and the refractive index contrast between the two fluids. The semi-angle of the cone at equilibrium decreases with the drop to beam radius ratio and is weakly influenced by the index contrast. Above a threshold value of the radiation pressure, these ``optical cones'' become unstable and a disruption is observed. Conversely, when optically squeezed, the drop shifts from an oblate to a concave shape leading to the formation of a stable ``optical torus''. These findings extend the electrohydrodynamics approach of drop deformation to the much less investigated "optical domain" and reveal the openings offered by laser waves to actively manipulate droplets at the micrometer scale.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enOpto-hydrodynamics
dc.subject.enRadiation pressure
dc.subject.enlaser
dc.subject.eninterface
dc.subject.encapillarity
dc.subject.endrop deformation
dc.title.enStretching and squeezing of sessile dielectric drops by the optical radiation pressure
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevE.77.066706
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]
dc.identifier.arxiv0903.1740
bordeaux.journalPhysical Review E : Statistical, Nonlinear, and Soft Matter Physics
bordeaux.page066706
bordeaux.volume77
bordeaux.peerReviewedoui
hal.identifierhal-00366699
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00366699v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20E%20:%20Statistical,%20Nonlinear,%20and%20Soft%20Matter%20Physics&rft.date=2008-06-17&rft.volume=77&rft.spage=066706&rft.epage=066706&rft.eissn=1539-3755&rft.issn=1539-3755&rft.au=CHRAIBI,%20Hamza&LASSEUX,%20Didier&ARQUIS,%20Eric&WUNENBURGER,%20R%C3%A9gis&DELVILLE,%20Jean-Pierre&rft.genre=article


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