The onset of three-dimensional centrifugal global modes and their nonlinear development in a recirculating flow over a flat surface
dc.contributor.author
hal.structure.identifier | CHERUBINI, Stefania
|
dc.contributor.author
hal.structure.identifier | DE PALMA, Pietro
|
dc.contributor.author | ALIZARD, Frédéric |
dc.contributor.author
hal.structure.identifier | ROBINET, Jean-Christophe
|
dc.date.accessioned | 2013 |
dc.date.available | 2013 |
dc.date.issued | 2010 |
dc.date.submitted | 2013 |
dc.identifier.issn | 1070-6631 |
dc.identifier.uri | http://hdl.handle.net/10985/6867 |
dc.description | Publisher version : http://pof.aip.org/resource/1/phfle6/v22/i11/p114102_s1?isAuthorized=no |
dc.description.abstract | The three-dimensional stability dynamics of a separation bubble over a flat plate has been studied in both linear and nonlinear conditions. Using a global eigenvalue analysis, two centrifugal global modes are identified: an asymptotically unstable three-dimensional weakly growing mode which appears to be originated by a Rayleigh instability; a marginally stable three-dimensional steady mode which is originated by a convective Gortler instability. Direct numerical simulations show that both modes play a role in the route to transition toward the turbulent flow. A structural sensitivity analysis is used to investigate the mechanism of selection of the path toward transition when small perturbations are considered. Finally, a scenario of transition via Gortler modes breakdown is studied in detail, revealing the formation of trains of hairpin vortices in streamwise succession. |
dc.language.iso | en_US |
dc.publisher | American Institute of Physics |
dc.rights | Post-print |
dc.subject | Instability of boundary layers |
dc.subject | flow separation |
dc.title | The onset of three-dimensional centrifugal global modes and their nonlinear development in a recirculating flow over a flat surface |
dc.identifier.doi | 10.1063/1.3500677 |
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 | 18 |
ensam.journal | Physics of Fluids |
ensam.volume | 22 |
ensam.issue | 114102 |
hal.identifier | hal-00799785 |
hal.version | 1 |
hal.submission.permitted | updateMetadata |
hal.status | accept |
dc.identifier.eissn | 1089-7666 |