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dc.contributor.authorChevillard, Laurent
HAL ID: 5342
dc.contributor.authorRobert, Raoul
dc.contributor.authorVargas, Vincent
HAL ID: 739861
dc.date.accessioned2014-01-09T08:31:46Z
dc.date.available2014-01-09T08:31:46Z
dc.date.issued2010
dc.identifier.urihttps://basepub.dauphine.fr/handle/123456789/12377
dc.language.isoenen
dc.subjectFluid dynamicsen
dc.subjectComputational physicsen
dc.subjectStatistical physics and nonlinear systemsen
dc.subject.ddc520en
dc.titleA Stochastic Representation of the Local Structure of Turbulenceen
dc.typeArticle accepté pour publication ou publié
dc.description.abstractenBased on the mechanics of the Euler equation at short time, we show that a Recent-Fluid-Deformation (RFD) closure for the vorticity field, neglecting the early stage of advection of fluid particles, allows to build a 3D incompressible velocity field that shares many properties with empirical turbulence, such as the teardrop shape of the RQ-plane. Unfortunately, non-Gaussianity is weak (i.e., no intermittency) and vorticity gets preferentially aligned with the wrong eigenvector of the deformation. We then show that slightly modifying the former vectorial field in order to impose the long-range–correlated nature of turbulence allows to reproduce the main properties of stationary flows. Doing so, we end up with a realistic incompressible, skewed and intermittent velocity field that reproduces the main characteristics of 3D turbulence in the inertial range, including correct vorticity alignment properties.en
dc.relation.isversionofjnlnameEurophysics Letters
dc.relation.isversionofjnlvol89en
dc.relation.isversionofjnlissue5en
dc.relation.isversionofjnldate2010
dc.relation.isversionofjnlpagesn°54002en
dc.relation.isversionofdoihttp://dx.doi.org/10.1209/0295-5075/89/54002en
dc.identifier.urlsitehttp://arxiv.org/abs/0906.5225v3en
dc.relation.isversionofjnlpublisherEDP Sciencesen
dc.subject.ddclabelSciences connexes (physique, astrophysique)en
dc.relation.forthcomingnonen
dc.relation.forthcomingprintnonen


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