AustralieFrV1, PascalFrancis, Corpus, bibRecord, 002791

Numerical and experimental studies of the rolling sphere wake

Identifieur interne : 002791 ( PascalFrancis/Corpus ); précédent : 002790; suivant : 002792

Numerical and experimental studies of the rolling sphere wake

Auteurs : B. E. Stewart ; M. C. Thompson ; T. Leweke ; K. Hourigan

Source :

Journal of Fluid Mechanics [ 0022-1120 ] ; 2010.

RBID : Pascal:10-0159316

Descripteurs français

Pascal (Inist)
- Ecoulement tourbillonnaire, Détachement tourbillonnaire, Sillage, Sphère tournante, Etude expérimentale, Simulation numérique, Paroi plane, Coefficient traînée, Distribution vitesse, 4727V, 4732F.

English descriptors

KwdEn :
- Digital simulation, Drag coefficient, Experimental study, Plane wall, Rotating sphere, Velocity distribution, Vortex flow, Vortex shedding, Wakes.

Abstract

A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0022-1120`
A02	`01`			`@0 JFLSA7`
A03		`1`		`@0 J. Fluid Mech.`
A05				`@2 643`
A08	`01`	`1`	`ENG`	`@1 Numerical and experimental studies of the rolling sphere wake`
A11	`01`	`1`		`@1 STEWART (B. E.)`
A11	`02`	`1`		`@1 THOMPSON (M. C.)`
A11	`03`	`1`		`@1 LEWEKE (T.)`
A11	`04`	`1`		`@1 HOURIGAN (K.)`
A14	`01`			`@1 Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, Monash University @2 Melbourne, Victoria 3800 @3 AUS @Z 1 aut. @Z 2 aut. @Z 4 aut.`
A14	`02`			`@1 Institut de Recherche sur les Phénomènes Hors Equilibre, CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146 @2 13384 Marseille @3 FRA @Z 1 aut. @Z 3 aut.`
A14	`03`			`@1 Division of Biological Engineering, Monash University @2 Melbourne, Victoria 3800 @3 AUS @Z 4 aut.`
A20				`@1 137-162`
A21				`@1 2010`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 5180 @5 354000189291180060`
A44				`@0 0000 @1 © 2010 INIST-CNRS. All rights reserved.`
A45				`@0 1 p.1/2`
A47	`01`	`1`		`@0 10-0159316`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of Fluid Mechanics`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.
C02	`01`	`3`		`@0 001B40G27V`
C02	`02`	`3`		`@0 001B40G32F`
C03	`01`	`3`	`FRE`	`@0 Ecoulement tourbillonnaire @5 02`
C03	`01`	`3`	`ENG`	`@0 Vortex flow @5 02`
C03	`02`	`X`	`FRE`	`@0 Détachement tourbillonnaire @5 03`
C03	`02`	`X`	`ENG`	`@0 Vortex shedding @5 03`
C03	`02`	`X`	`SPA`	`@0 Desprendimiento vorticial @5 03`
C03	`03`	`3`	`FRE`	`@0 Sillage @5 08`
C03	`03`	`3`	`ENG`	`@0 Wakes @5 08`
C03	`04`	`X`	`FRE`	`@0 Sphère tournante @5 09`
C03	`04`	`X`	`ENG`	`@0 Rotating sphere @5 09`
C03	`04`	`X`	`SPA`	`@0 Esfera rotativa @5 09`
C03	`05`	`3`	`FRE`	`@0 Etude expérimentale @5 15`
C03	`05`	`3`	`ENG`	`@0 Experimental study @5 15`
C03	`06`	`3`	`FRE`	`@0 Simulation numérique @5 16`
C03	`06`	`3`	`ENG`	`@0 Digital simulation @5 16`
C03	`07`	`X`	`FRE`	`@0 Paroi plane @5 29`
C03	`07`	`X`	`ENG`	`@0 Plane wall @5 29`
C03	`07`	`X`	`SPA`	`@0 Pared plana @5 29`
C03	`08`	`X`	`FRE`	`@0 Coefficient traînée @5 30`
C03	`08`	`X`	`ENG`	`@0 Drag coefficient @5 30`
C03	`08`	`X`	`SPA`	`@0 Coeficiente resistencia aerodinámica @5 30`
C03	`09`	`3`	`FRE`	`@0 Distribution vitesse @5 31`
C03	`09`	`3`	`ENG`	`@0 Velocity distribution @5 31`
C03	`10`	`3`	`FRE`	`@0 4727V @4 INC @5 56`
C03	`11`	`3`	`FRE`	`@0 4732F @4 INC @5 57`
N21				`@1 102`

Format Inist (serveur)

NO :	PASCAL 10-0159316 INIST
ET :	Numerical and experimental studies of the rolling sphere wake
AU :	STEWART (B. E.); THOMPSON (M. C.); LEWEKE (T.); HOURIGAN (K.)
AF :	Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, Monash University/Melbourne, Victoria 3800/Australie (1 aut., 2 aut., 4 aut.); Institut de Recherche sur les Phénomènes Hors Equilibre, CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146/13384 Marseille/France (1 aut., 3 aut.); Division of Biological Engineering, Monash University/Melbourne, Victoria 3800/Australie (4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of Fluid Mechanics; ISSN 0022-1120; Coden JFLSA7; Royaume-Uni; Da. 2010; Vol. 643; Pp. 137-162; Bibl. 1 p.1/2
LA :	Anglais
EA :	A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.
CC :	001B40G27V; 001B40G32F
FD :	Ecoulement tourbillonnaire; Détachement tourbillonnaire; Sillage; Sphère tournante; Etude expérimentale; Simulation numérique; Paroi plane; Coefficient traînée; Distribution vitesse; 4727V; 4732F
ED :	Vortex flow; Vortex shedding; Wakes; Rotating sphere; Experimental study; Digital simulation; Plane wall; Drag coefficient; Velocity distribution
SD :	Desprendimiento vorticial; Esfera rotativa; Pared plana; Coeficiente resistencia aerodinámica
LO :	INIST-5180.354000189291180060
ID :	10-0159316

Links to Exploration step

Pascal:10-0159316

Le document en format XML

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<front><div type="abstract" xml:lang="en">A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.</div>
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<fC01 i1="01" l="ENG"><s0>A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.</s0>
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<s5>30</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Drag coefficient</s0>
<s5>30</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Coeficiente resistencia aerodinámica</s0>
<s5>30</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Distribution vitesse</s0>
<s5>31</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Velocity distribution</s0>
<s5>31</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>4727V</s0>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>4732F</s0>
<s4>INC</s4>
<s5>57</s5>
</fC03>
<fN21><s1>102</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 10-0159316 INIST</NO>
<ET>Numerical and experimental studies of the rolling sphere wake</ET>
<AU>STEWART (B. E.); THOMPSON (M. C.); LEWEKE (T.); HOURIGAN (K.)</AU>
<AF>Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering, Monash University/Melbourne, Victoria 3800/Australie (1 aut., 2 aut., 4 aut.); Institut de Recherche sur les Phénomènes Hors Equilibre, CNRS/Universités Aix-Marseille, 49 rue Frédéric Joliot-Curie, BP 146/13384 Marseille/France (1 aut., 3 aut.); Division of Biological Engineering, Monash University/Melbourne, Victoria 3800/Australie (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of Fluid Mechanics; ISSN 0022-1120; Coden JFLSA7; Royaume-Uni; Da. 2010; Vol. 643; Pp. 137-162; Bibl. 1 p.1/2</SO>
<LA>Anglais</LA>
<EA>A numerical and experimental investigation is reported for the flow around a rolling sphere when moving adjacent to a plane wall. The dimensionless rotation rate of the sphere is varied from forward to reversed rolling and the resulting wake modes are found to be strongly dependent on the value of this parameter. Results are reported for the Reynolds number range 100 < Re < 350, which has been shown to capture the unsteady transitions in the wake. Over this range of Reynolds number, both steady and unsteady wake modes are observed. As the sphere undergoes forward rolling, the wake displays similarities to the flow behind an isolated sphere in a free stream. As the Reynolds number of the flow increases, hairpin vortices form and are shed over the surface of the sphere. However, for cases with reversed rotation, the wake takes the form of two distinct streamwise vortices that form around the sides of the body. These streamwise structures in the wake undergo a transition to a new unsteady mode as the Reynolds number increases. During the evolution of this unsteady mode, the streamwise vortices form an out-of-phase spiral pair. Four primary wake modes are identified and a very good qualitative agreement is observed between the numerical and experimental results. The numerical simulations also reveal the existence of an additional unsteady mode that is found to be unstable to small perturbations in the flow.</EA>
<CC>001B40G27V; 001B40G32F</CC>
<FD>Ecoulement tourbillonnaire; Détachement tourbillonnaire; Sillage; Sphère tournante; Etude expérimentale; Simulation numérique; Paroi plane; Coefficient traînée; Distribution vitesse; 4727V; 4732F</FD>
<ED>Vortex flow; Vortex shedding; Wakes; Rotating sphere; Experimental study; Digital simulation; Plane wall; Drag coefficient; Velocity distribution</ED>
<SD>Desprendimiento vorticial; Esfera rotativa; Pared plana; Coeficiente resistencia aerodinámica</SD>
<LO>INIST-5180.354000189291180060</LO>
<ID>10-0159316</ID>
</server>
</inist>
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Numerical and experimental studies of the rolling sphere wake

Numerical and experimental studies of the rolling sphere wake

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