Sharp Transition in the Lift Force of a Fluid Flowing Past Nonsymmetrical Obstacles: Evidence for a Lift Crisis in the Drag Crisis Regime
dc.contributor.author
hal.structure.identifier | RABAUD, Marc
|
dc.contributor.author | THOMAS, Goulven |
dc.contributor.author | LOMBARDI, Alessandro |
dc.contributor.author | LEBRET, Charles |
dc.contributor.author
hal.structure.identifier | BOT, Patrick
|
dc.date.accessioned | 2016 |
dc.date.available | 2016 |
dc.date.issued | 2016 |
dc.date.submitted | 2016 |
dc.identifier.issn | 0031-9007 |
dc.identifier.uri | http://hdl.handle.net/10985/11396 |
dc.description.abstract | Bluff bodies moving in a fluid experience a drag force which usually increases with velocity. However in a particular velocity range a drag crisis is observed, i.e., a sharp and strong decrease of the drag force. This counterintuitive result is well characterized for a sphere or a cylinder. Here we show that, for an object breaking the up-down symmetry, a lift crisis is observed simultaneously to the drag crisis. The term lift crisis refers to the fact that at constant incidence the time-averaged transverse force, which remains small or even negative at low velocity, transitions abruptly to large positive values above a critical flow velocity. This transition is characterized from direct force measurements as well as from change in the velocity field around the obstacle. |
dc.language.iso | en |
dc.publisher | American Physical Society |
dc.rights | Post-print |
dc.subject | Lift Crisis |
dc.subject | drag crisis |
dc.subject | nonsymmetrical obstacles |
dc.title | Sharp Transition in the Lift Force of a Fluid Flowing Past Nonsymmetrical Obstacles: Evidence for a Lift Crisis in the Drag Crisis Regime |
dc.identifier.doi | 10.1103/PhysRevLett.117.234501 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Physique: Dynamique des Fluides |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des fluides |
ensam.audience | Internationale |
ensam.page | 234501-1 à 5 |
ensam.journal | Physical Review Letters |
ensam.volume | 117 |
ensam.peerReviewing | Oui |
hal.identifier | hal-01410405 |
hal.version | 1 |
hal.submission.permitted | updateMetadata |
hal.status | accept |
dc.identifier.eissn | 1079-7114 |