Mostra el registre d'ítem simple
Transitions to three-dimensional flows in a cylinder driven by oscillations of the sidewall
dc.contributor.author | Panadès Guinart, Carles |
dc.contributor.author | Marqués Truyol, Francisco |
dc.contributor.author | Lopez, Juan M. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física Aplicada |
dc.contributor.other | Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports de Barcelona |
dc.date.accessioned | 2011-09-29T11:36:44Z |
dc.date.available | 2012-09-29T23:30:14Z |
dc.date.created | 2011-08 |
dc.date.issued | 2011-08 |
dc.identifier.citation | Panades, C.; Marques, F.; Lopez, J. M. Transitions to three-dimensional flows in a cylinder driven by oscillations of the sidewall. "Journal of fluid mechanics", Agost 2011, vol. 681, p. 515-536. |
dc.identifier.issn | 0022-1120 |
dc.identifier.uri | http://hdl.handle.net/2117/13391 |
dc.description.abstract | The transition from two-dimensional to three-dimensional flows in a finite circular cylinder driven by an axially oscillating sidewall is explored in detail. The complete symmetry group of this flow, including a spatio-temporal symmetry related to the oscillating sidewall, is Z2xO(2). Previous studies in flows with the same symmetries, such as symmetric bluff-body wakes and periodically forced rectangular cavities, were unable to obtain the theoretically predicted bifurcation to modulated travelling waves. In the simpler cylindrical geometry, where the azimuthal direction is physically periodic, we have found these predicted modulated travelling waves as stable fully saturated nonlinear solutions for the first time. A careful analysis of the base states and their linear stability identifies different parameter regimes where three-dimensional states are either synchronous with the forcing or quasi-periodic, corresponding to different symmetry-breaking processes. These results are in good agreement with theoretical predictions and previous results in similar flows. These different regimes are separated by three codimension-two bifurcation points that are yet to be fully analysed theoretically. Finally, the saturated nonlinear states and their properties in different parameter regimes are analysed. |
dc.format.extent | 22 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Física::Física de fluids |
dc.subject.lcsh | Bifurcation |
dc.subject.lcsh | Nonlinear instability |
dc.subject.lcsh | Parametric instability |
dc.title | Transitions to three-dimensional flows in a cylinder driven by oscillations of the sidewall |
dc.type | Article |
dc.subject.lemac | Inestabilitat |
dc.subject.lemac | Bifurcació, Teoria de la |
dc.contributor.group | Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids |
dc.identifier.doi | 10.1017/jfm.2011.215 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8333199 |
dc.rights.access | Open Access |
local.identifier.drac | 5963771 |
dc.description.version | Postprint (published version) |
local.citation.author | Panades, C.; Marques, F.; Lopez, J. M. |
local.citation.publicationName | Journal of fluid mechanics |
local.citation.volume | 681 |
local.citation.startingPage | 515 |
local.citation.endingPage | 536 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [213]
-
Articles de revista [454]