AustralieFrV1, Istex, Corpus, bibRecord, 001515

Characteristics of the near wake of a cylinder at low Reynolds numbers

Identifieur interne : 001515 ( Istex/Corpus ); précédent : 001514; suivant : 001516

Characteristics of the near wake of a cylinder at low Reynolds numbers

Auteurs : P. Paranthoën ; L. W. B. Browne ; S. Le Masson ; F. Dumouchel ; J. C. Lecordier

Source :

European Journal of Mechanics / B Fluids [ 0997-7546 ] ; 1999.

RBID : ISTEX:709493AF454A757761F5240A1DCF7F4448D51CBB

English descriptors

KwdEn :
- Bluff bodies, Bluff body, Center line, Circular cylinder, Circular cylinders, Critical length, Critical reynolds number, Cylinder wake, Dimensionless, Dimensionless evolution, Dimensionless form, European journal, Exponent, Fluid mech, Gure, Interaction term, Kovasznay, Longitudinal, Longitudinal evolution, Longitudinal velocities, Longitudinal velocity, Maximum value, Mech, Periodic wake, Recirculation, Recirculation zone, Reynolds, Reynolds number, Reynolds numbers, Shear layer, Shear layer spacing, Shear layer thickness, Shear layers, Threshold difference, Transverse velocities, Transverse velocity, Velocity distributions, Velocity gradient, Velocity measurements, Vortex, Wave length, Xmax, Xmax decreases.
Teeft :
- Bluff bodies, Bluff body, Center line, Circular cylinder, Circular cylinders, Critical length, Critical reynolds number, Cylinder wake, Dimensionless, Dimensionless evolution, Dimensionless form, European journal, Exponent, Fluid mech, Gure, Interaction term, Kovasznay, Longitudinal, Longitudinal evolution, Longitudinal velocities, Longitudinal velocity, Maximum value, Mech, Periodic wake, Recirculation, Recirculation zone, Reynolds, Reynolds number, Reynolds numbers, Shear layer, Shear layer spacing, Shear layer thickness, Shear layers, Threshold difference, Transverse velocities, Transverse velocity, Velocity distributions, Velocity gradient, Velocity measurements, Vortex, Wave length, Xmax, Xmax decreases.

Abstract

Abstract: An experimental study has been made of the near wake of two two-dimensional bluff bodies, a circular cylinder and a flat ribbon in the regimes corresponding to the 2-D steady and 2-D periodic wake. Velocity measurements from both hot-wire and laser Doppler anemometry are compared. Detailed measurements of the velocity field in air in the near wake, in isothermal conditions, are presented. The evolutions of the mean longitudinal velocity and the rms transverse velocity fluctuation on the center line can be plotted in a universal form whatever the value of the Reynolds number. These measurements show also that the onset of the instability is related to a critical value of an interaction term characteristic of the strength of the shear layers and the shear layer spacing at the end of the recirculation zone.

Url:

https://api.istex.fr/document/709493AF454A757761F5240A1DCF7F4448D51CBB/fulltext/pdf

DOI: 10.1016/S0997-7546(99)00105-3

Links to Exploration step

ISTEX:709493AF454A757761F5240A1DCF7F4448D51CBB

Le document en format XML

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<abstract xml:lang="en"><p>An experimental study has been made of the near wake of two two-dimensional bluff bodies, a circular cylinder and a flat ribbon in the regimes corresponding to the 2-D steady and 2-D periodic wake. Velocity measurements from both hot-wire and laser Doppler anemometry are compared. Detailed measurements of the velocity field in air in the near wake, in isothermal conditions, are presented. The evolutions of the mean longitudinal velocity and the rms transverse velocity fluctuation on the center line can be plotted in a universal form whatever the value of the Reynolds number. These measurements show also that the onset of the instability is related to a critical value of an interaction term characteristic of the strength of the shear layers and the shear layer spacing at the end of the recirculation zone.</p>
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<head><ce:title>Characteristics of the near wake of a cylinder at low Reynolds numbers</ce:title>
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<ce:abstract-sec><ce:simple-para>An experimental study has been made of the near wake of two two-dimensional bluff bodies, a circular cylinder and a flat ribbon in the regimes corresponding to the 2-D steady and 2-D periodic wake. Velocity measurements from both hot-wire and laser Doppler anemometry are compared. Detailed measurements of the velocity field in air in the near wake, in isothermal conditions, are presented. The evolutions of the mean longitudinal velocity and the rms transverse velocity fluctuation on the center line can be plotted in a universal form whatever the value of the Reynolds number. These measurements show also that the onset of the instability is related to a critical value of an interaction term characteristic of the strength of the shear layers and the shear layer spacing at the end of the recirculation zone.</ce:simple-para>
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<abstract lang="en">Abstract: An experimental study has been made of the near wake of two two-dimensional bluff bodies, a circular cylinder and a flat ribbon in the regimes corresponding to the 2-D steady and 2-D periodic wake. Velocity measurements from both hot-wire and laser Doppler anemometry are compared. Detailed measurements of the velocity field in air in the near wake, in isothermal conditions, are presented. The evolutions of the mean longitudinal velocity and the rms transverse velocity fluctuation on the center line can be plotted in a universal form whatever the value of the Reynolds number. These measurements show also that the onset of the instability is related to a critical value of an interaction term characteristic of the strength of the shear layers and the shear layer spacing at the end of the recirculation zone.</abstract>
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Characteristics of the near wake of a cylinder at low Reynolds numbers

Characteristics of the near wake of a cylinder at low Reynolds numbers

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