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dc.contributor.authorKamat, Pen_US
dc.contributor.authorWagoner, Ben_US
dc.contributor.authorCastrejon-Pita, AAen_US
dc.contributor.authorCastrejon Pita, Jen_US
dc.contributor.authorAnthony, Cen_US
dc.contributor.authorBasaran, Oen_US
dc.date.accessioned2020-06-24T09:04:16Z
dc.date.available2020-05-31en_US
dc.identifier.issn0022-1120en_US
dc.identifier.urihttps://qmro.qmul.ac.uk/xmlui/handle/123456789/65181
dc.description.abstractHighly stretched liquid drops, or laments, surrounded by a gas are routinely encountered in nature and industry. Such laments can exhibit complex and unexpected dynamics as they contract under the action of surface tension. Instead of simply retracting to a sphere of the same volume, low-viscosity laments exceeding a critical aspect ratio undergo localized pinch-off at their two ends resulting in a sequence of daughter droplets|a phenomenon called endpinching which is an archetype breakup mode that is distinct from the classical Rayleigh-Plateau instability seen in jet breakup. It has been shown that endpinching can be precluded in filaments of intermediate viscosity, with the so-called escape from endpinching being understood heretofore only qualitatively as being caused by a viscous mechanism. Here, we show that a similar escape can also occur in nearly inviscid laments when surfactants are present at the free surface of a recoiling lament. The fluid dynamics of the escape phenomenon is probed by numerical simulations. The computational results are used to show that the escape is driven by the action of Marangoni stress. Despite the apparently distinct physical origins of escape in moderately viscous surfactant-free laments and that in nearly inviscid but surfactant-covered fi laments, it is demonstrated that the genesis of all escape events can be attributed to a single cause - the generation of vorticity at curved interfaces. By analyzing vorticity dynamics and the balance of vorticity in recoiling filaments, the manner in which surface tension gradients and concomitant Marangoni stresses can lead to escape from endpinching is clarifi ed.en_US
dc.publisherCambridge University Press (CUP)en_US
dc.relation.ispartofJournal of Fluid Mechanicsen_US
dc.rightsThis is a pre-copyedited, author-produced version of an article accepted for publication in Journal of Fluid Mechanics following peer review.
dc.titleSurfactant-driven escape from endpinching during contraction of nearly inviscid filamentsen_US
dc.typeArticle
dc.rights.holder© 2020 Cambridge University Press (CUP)
pubs.notesNot knownen_US
pubs.publication-statusAccepteden_US
dcterms.dateAccepted2020-05-31en_US
rioxxterms.funderDefault funderen_US
rioxxterms.identifier.projectDefault projecten_US
rioxxterms.funder.project483cf8e1-88a1-4b8b-aecb-8402672d45f8en_US


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