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dc.contributor.author
 hal.structure.identifier
CHERUBINI, Stefania
19097 Dipartimento di Ingegneria Meccanica e Gestionale [DIMEG]
dc.contributor.author
 hal.structure.identifier
DE PALMA, Pietro
19097 Dipartimento di Ingegneria Meccanica e Gestionale [DIMEG]
dc.contributor.authorBOTTARO, Alessandro
dc.contributor.author
 hal.structure.identifier
ROBINET, Jean-Christophe
134975 Laboratoire de Dynamique des Fluides [DynFluid]
dc.date.accessioned2013
dc.date.available2013
dc.date.issued2010
dc.date.submitted2013
dc.identifier.issn2470-0045
dc.identifier.urihttp://hdl.handle.net/10985/6861
dc.description.abstractRecent studies have suggested that in some cases transition can be triggered by some purely nonlinear mechanisms. Here we aim at verifying such an hypothesis, looking for a localized perturbation able to lead a boundary-layer flow to a chaotic state, following a nonlinear route. Nonlinear optimal localized perturbations have been computed by means of an energy optimization which includes the nonlinear terms of the Navier- Stokes equations. Such perturbations lie on the turbulent side of the laminar-turbulent boundary, whereas, for the same value of the initial energy, their linear counterparts do not. The evolution of these perturbations toward a turbulent flow involves the presence of streamwise-inclined vortices at short times and of hairpin structures prior to breakdown.
dc.language.isoen_US
dc.publisherAmerican Physical Society (APS)
dc.rightsPost-print
dc.subjectturbulence transition
dc.subjectboundary-layer
dc.subjectnon-linear instability
dc.titleRapid path to transition via nonlinear localized optimal perturbations in a boundary-layer flow
dc.identifier.doi10.1103/PhysRevE.82.066302
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Paris
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des fluides
ensam.audienceInternationale
ensam.page5
ensam.journalPhysical Review E
ensam.volume82
hal.identifierhal-00799736
hal.version1
hal.submission.permittedupdateMetadata
hal.statusaccept
dc.identifier.eissn2470-0053


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