A numerical study of an inline oscillating cylinder in a free stream

Abstract : Simulations of a cylinder undergoing externally controlled sinusoidal oscillations in the free stream direction have been performed. The frequency of oscillation was kept equal to the vortex shedding frequency from a fixed cylinder, while the amplitude of oscillation was varied, and the response of the flow measured. With varying amplitude, a rich series of dynamic responses was recorded. With increasing amplitude, these states included wakes similar to the Kármán vortex street, quasiperiodic oscillations interleaved with regions of synchronized periodicity (periodic on multiple oscillation cycles), a period-doubled state and chaotic oscillations. It is hypothesized that, for low to moderate amplitudes, the wake dynamics are controlled by vortex shedding at a global frequency, modified by the oscillation. This vortex shedding is frequency modulated by the driven oscillation and amplitude modulated by vortex interaction. Data are presented to support this hypothesis.
Type de document :
Article dans une revue
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2011, vol. 688, pp. 551-568
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-00959379
Contributeur : Open Archive Toulouse Archive Ouverte (oatao) <>
Soumis le : vendredi 14 mars 2014 - 12:40:36
Dernière modification le : jeudi 13 septembre 2018 - 14:20:03

Identifiants

  • HAL Id : hal-00959379, version 1
  • OATAO : 5313

Collections

Citation

Justin S. Leontini, David Lo Jacono, Mark C. Thompson. A numerical study of an inline oscillating cylinder in a free stream. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2011, vol. 688, pp. 551-568. 〈hal-00959379〉

Partager

Métriques

Consultations de la notice

418