Transient growth of perturbations in Stokes oscillatory flows
dc.contributor.author
hal.structure.identifier | BIAU, Damien
|
dc.date.accessioned | 2016 |
dc.date.available | 2016 |
dc.date.issued | 2016 |
dc.date.submitted | 2016 |
dc.identifier.issn | 0022-1120 |
dc.identifier.uri | http://hdl.handle.net/10985/11246 |
dc.description.abstract | Oscillatory Stokes flows, with zero mean, are subjected to subcritical transition to turbulence. The maximal energy growth of perturbations is computed in the subcritical regime through an optimisation method. The results show strong amplifications during half a period. The energy transfer from the base flow involves an Orr mechanism with two-dimensional vorticity waves, and the maximum energy scales exponentially with the Reynolds number. Nonlinear simulations show that low-energy perturbations are sufficient to trigger turbulent flow. |
dc.language.iso | en |
dc.publisher | Cambridge University Press (CUP) |
dc.rights | Post-print |
dc.subject | boundary layer stability |
dc.subject | instability |
dc.subject | transition to turbulence |
dc.title | Transient growth of perturbations in Stokes oscillatory flows |
ensam.embargo.terms | 2016-12-01 |
dc.identifier.doi | 10.1017/jfm.2016.210 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des fluides |
ensam.audience | Internationale |
ensam.page | 10 |
ensam.journal | Journal of Fluid Mechanics |
ensam.volume | 794 |
ensam.peerReviewing | Oui |
hal.identifier | hal-01377582 |
hal.version | 1 |
hal.status | accept |
dc.identifier.eissn | 1469-7645 |