AustralieFrV1, Main, Exploration, bibRecord, 006563

Vortex shedding and three-dimensional behaviour of flow past a cylinder confined in a channel

Identifieur interne : 006563 ( Main/Exploration ); précédent : 006562; suivant : 006564

Vortex shedding and three-dimensional behaviour of flow past a cylinder confined in a channel

Auteurs : Martin D. Griffith [Australie] ; Justin Leontini [Australie] ; Mark C. Thompson [Australie] ; Kerry Hourigan [Australie]

Source :

Journal of fluids and structures [ 0889-9746 ] ; 2011.

RBID : Pascal:11-0375074

Descripteurs français

Pascal (Inist)
- Détachement tourbillonnaire, Ecoulement tridimensionnel, Nombre Reynolds faible, Ecoulement permanent, Nombre Reynolds, Ecoulement tourbillonnaire, Aérodynamique, Visualisation B, Image acoustique, Battement, Méthode Floquet, Sillage.
Wicri :
- topic : Aérodynamique.

English descriptors

KwdEn :
- Acoustic image, Aerodynamics, B scan, Beats, Floquet method, Low Reynolds number, Reynolds number, Steady flow, Three dimensional flow, Vortex flow, Vortex shedding, Wakes.

Abstract

A numerical investigation of the flow past a circular cylinder centred in a two-dimensional channel of varying width is presented. For low Reynolds numbers, the flow is steady. For higher Reynolds numbers, vortices begin to shed periodically from the cylinder. In general, the Strouhal frequency of the shedding vortices increases with blockage ratio. In addition, a two-dimensional instability of the periodic vortex shedding is found, both empirically and by means of a Floquet stability analysis. The instability leads to a beating behaviour in the lift and drag coefficients of the cylinder, which occurs at a Reynolds number higher than the critical Reynolds number for the three-dimensional mode A-type instability, but lower than a Reynolds number for any mode B-type instability.

Affiliations:

Australie

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 001A30
to stream PascalFrancis, to step Curation: 004514
to stream PascalFrancis, to step Checkpoint: 001492
to stream Main, to step Merge: 006943
to stream Main, to step Curation: 006563

Le document en format XML

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<front><div type="abstract" xml:lang="en">A numerical investigation of the flow past a circular cylinder centred in a two-dimensional channel of varying width is presented. For low Reynolds numbers, the flow is steady. For higher Reynolds numbers, vortices begin to shed periodically from the cylinder. In general, the Strouhal frequency of the shedding vortices increases with blockage ratio. In addition, a two-dimensional instability of the periodic vortex shedding is found, both empirically and by means of a Floquet stability analysis. The instability leads to a beating behaviour in the lift and drag coefficients of the cylinder, which occurs at a Reynolds number higher than the critical Reynolds number for the three-dimensional mode A-type instability, but lower than a Reynolds number for any mode B-type instability.</div>
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Vortex shedding and three-dimensional behaviour of flow past a cylinder confined in a channel

Vortex shedding and three-dimensional behaviour of flow past a cylinder confined in a channel

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri