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Journal of fluids engineering, Vol.111. Three-dimensional particle tracking velocimetry based on automated digital image processing / N. Nishino
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.111 Titre : Three-dimensional particle tracking velocimetry based on automated digital image processing Type de document : articles et extraits Auteurs : N. Nishino, Auteur ; M. Hirata, Auteur ; N. Kasagi, Auteur Année de publication : 1989 Importance : p.384-391 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.111. Three-dimensional particle tracking velocimetry based on automated digital image processing [articles et extraits] / N. Nishino, Auteur ; M. Hirata, Auteur ; N. Kasagi, Auteur . - 1989 . - p.384-391.
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Code-barres Cote Support Localisation Section Disponibilité ART-8028-0 ART Document imprimé Bureau chercheur Bureau de KNAPP Yannick Disponible Journal of fluids engineering, Vol.126 No.3. Instability of inelastic shear-thinning liquids in a Couette flow between concentric cylinders / O. Coronado-Matutti
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.126 No.3 Titre : Instability of inelastic shear-thinning liquids in a Couette flow between concentric cylinders Type de document : articles et extraits Auteurs : O. Coronado-Matutti, Auteur ; M. S. Carvalho, Auteur ; P. R. Souza Mendes, Auteur Année de publication : 2004 Importance : p.385-390 ISBN/ISSN/EAN : 0098-2202 Langues : Français (fre) Résumé : Circular Couette flow of inelastic shear-thinning materials in annuli is examined. The curved streamlines of the circular Couette flow can cause a centrifugal instability leading to toroidal vortices, well known as Taylor vortices. The presence of these vortices changes the hydrodynamic and heat transfer characteristics of the processes at which this type of flow occurs. Therefore, it is quite important to be able to predict the onset of instability. Most of the available theoretical and experimental analyses are for Newtonian and viscoelastic (dilute polymeric solutions) liquids. In this work, the effect of the shear-thinning behavior of high concentration suspensions on the onset of the Taylor vortices is determined theoretically by solving the conservation equations, constructing the solution path as the inner cylinder speed rises and searching for the critical conditions. This procedure avoids the need for a stability analysis of the flow and the solution of an eigenproblem. The differential equations were solved by the Galerkin/finite-element method and the resulting set of nonlinear algebraic equations, by Newton's method. ©2004 ASME
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.126 No.3. Instability of inelastic shear-thinning liquids in a Couette flow between concentric cylinders [articles et extraits] / O. Coronado-Matutti, Auteur ; M. S. Carvalho, Auteur ; P. R. Souza Mendes, Auteur . - 2004 . - p.385-390.
ISSN : 0098-2202
Langues : Français (fre)
Résumé : Circular Couette flow of inelastic shear-thinning materials in annuli is examined. The curved streamlines of the circular Couette flow can cause a centrifugal instability leading to toroidal vortices, well known as Taylor vortices. The presence of these vortices changes the hydrodynamic and heat transfer characteristics of the processes at which this type of flow occurs. Therefore, it is quite important to be able to predict the onset of instability. Most of the available theoretical and experimental analyses are for Newtonian and viscoelastic (dilute polymeric solutions) liquids. In this work, the effect of the shear-thinning behavior of high concentration suspensions on the onset of the Taylor vortices is determined theoretically by solving the conservation equations, constructing the solution path as the inner cylinder speed rises and searching for the critical conditions. This procedure avoids the need for a stability analysis of the flow and the solution of an eigenproblem. The differential equations were solved by the Galerkin/finite-element method and the resulting set of nonlinear algebraic equations, by Newton's method. ©2004 ASME
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Code-barres Cote Support Localisation Section Disponibilité ART-8090-0 ART Document imprimé Bureau chercheur Bureau de PONCET Sébastien Disponible Journal of fluids engineering, Vol.113. Review-mechanisms of cavitation inception / E. P. Rood
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.113 Titre : Review-mechanisms of cavitation inception Type de document : articles et extraits Auteurs : E. P. Rood, Auteur Année de publication : 1991 Importance : p.163-175 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.113. Review-mechanisms of cavitation inception [articles et extraits] / E. P. Rood, Auteur . - 1991 . - p.163-175.
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Code-barres Cote Support Localisation Section Disponibilité ART-8107-0 ART Document imprimé Bureau chercheur Bureau de CAILLE François Disponible Journal of fluids engineering, Vol.116. Review : laminar-turbulent transition of three-dimensional boundary layers on rotating bodies / R. Kobayashi
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.116 Titre : Review : laminar-turbulent transition of three-dimensional boundary layers on rotating bodies Type de document : articles et extraits Auteurs : R. Kobayashi, Auteur Année de publication : 1994 Importance : p.200-211 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.116. Review : laminar-turbulent transition of three-dimensional boundary layers on rotating bodies [articles et extraits] / R. Kobayashi, Auteur . - 1994 . - p.200-211.
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Code-barres Cote Support Localisation Section Disponibilité ART-8137-0 ART Document imprimé Bureau chercheur Bureau de RANDRIAMAMPIANINA Anthony Disponible Journal of fluids engineering, Vol.112. A study on vortex shedding from spheres in a uniform-flow / H. Sakamoto
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.112 Titre : A study on vortex shedding from spheres in a uniform-flow Type de document : articles et extraits Auteurs : H. Sakamoto, Auteur ; H. Haniu, Auteur Année de publication : 1990 Importance : p.386-392 ISBN/ISSN/EAN : 0098-2202 Langues : Français (fre) Résumé : Vortex shedding from spheres at Reynolds numbers from 3 x 10(2) to 4 x 10(4) in a uniform flow was investigated experimentally. Standard hot-wire technique were used to measure the vortex shedding frequency from spheres in a low-speed wind tunnel. Flow-visualization experiments were carried out in a water channel. Important results from the investigation were that (i) the variation of the Strouhal number St ( = fD/U0, U0: freestream velocity, D: diameter of the sphere, f: vortex shedding frequency) with the Reynolds number ( = U0D/v, v: kinematic viscosity) can be classified into four regions, (ii) the Reynolds number at which the hairpinshaped vortices begin to change from laminar to turbulent vortices so that the wake structure behind the sphere is not shown clearly when a Reynolds number of about 800 is reached, and (vi) at Reynolds numbers ranging from 8 x 10(2) to 1.5 x 10(4), the higher and lower frequency modes of the Strouhal number coexist.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.112. A study on vortex shedding from spheres in a uniform-flow [articles et extraits] / H. Sakamoto, Auteur ; H. Haniu, Auteur . - 1990 . - p.386-392.
ISSN : 0098-2202
Langues : Français (fre)
Résumé : Vortex shedding from spheres at Reynolds numbers from 3 x 10(2) to 4 x 10(4) in a uniform flow was investigated experimentally. Standard hot-wire technique were used to measure the vortex shedding frequency from spheres in a low-speed wind tunnel. Flow-visualization experiments were carried out in a water channel. Important results from the investigation were that (i) the variation of the Strouhal number St ( = fD/U0, U0: freestream velocity, D: diameter of the sphere, f: vortex shedding frequency) with the Reynolds number ( = U0D/v, v: kinematic viscosity) can be classified into four regions, (ii) the Reynolds number at which the hairpinshaped vortices begin to change from laminar to turbulent vortices so that the wake structure behind the sphere is not shown clearly when a Reynolds number of about 800 is reached, and (vi) at Reynolds numbers ranging from 8 x 10(2) to 1.5 x 10(4), the higher and lower frequency modes of the Strouhal number coexist.
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Code-barres Cote Support Localisation Section Disponibilité ART-8175-0 ART Document imprimé Bureau chercheur Bureau de SOUILLIEZ Claire Disponible Journal of fluids engineering, Vol.103 No.1. Photographic study of cavitation in jet flow / J. W. Hoyt
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.103 No.1 Titre : Photographic study of cavitation in jet flow Type de document : articles et extraits Auteurs : J. W. Hoyt, Auteur ; J. J. Taylor, Auteur Année de publication : 1981 Importance : p.14-18 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.103 No.1. Photographic study of cavitation in jet flow [articles et extraits] / J. W. Hoyt, Auteur ; J. J. Taylor, Auteur . - 1981 . - p.14-18.
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Code-barres Cote Support Localisation Section Disponibilité ART-8441-0 ART Document imprimé Bureau chercheur Bureau de AMIELH Muriel Disponible Journal of fluids engineering, Vol.120. Particle Entrainment in a Bounded Rotating Flow with a Drain / J. B. Mang
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.120 Titre : Particle Entrainment in a Bounded Rotating Flow with a Drain Type de document : articles et extraits Auteurs : J. B. Mang, Auteur ; E. Minkov, Auteur ; U. H. Schaflinger, Auteur ; M. Ungarish, Auteur Année de publication : 1997 Importance : p.676-679 Langues : Français (fre) Résumé : A bathtub vortex usually forms at the axis of a drain. In the presence of such a vortex, gravity separation of solid impurities lighter than the embedding fluid is counteracted by centrifugal separation and viscous resuspension. Both mechanisms are responsible for the agglomeration of impurities at the axis of the vortex. From there the impurities are easily sucked into the outlet. In the investigated case viscous fluid with a given initial rotation is spinning down in a container with rigid boundaries both at the bottom and the top. The amount of fluid withdrawn through a circular hole in the center of the vortex is constantly replaced by a radial influx. The resulting time--dependent flow was solved by means of a finite difference method taking into account the influence of Ekman layers at the bottom and the top. Subsequently the process of centrifugal separation of particles lighter than the embedding fluid was studied according to the above mentioned flow field. The results were compared with the particle motion in an Oseen--vortex. For a simplified case an analytical solution was derived and compared with the corresponding numerical solution. Both results were found to be in very good agreement.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.120. Particle Entrainment in a Bounded Rotating Flow with a Drain [articles et extraits] / J. B. Mang, Auteur ; E. Minkov, Auteur ; U. H. Schaflinger, Auteur ; M. Ungarish, Auteur . - 1997 . - p.676-679.
Langues : Français (fre)
Résumé : A bathtub vortex usually forms at the axis of a drain. In the presence of such a vortex, gravity separation of solid impurities lighter than the embedding fluid is counteracted by centrifugal separation and viscous resuspension. Both mechanisms are responsible for the agglomeration of impurities at the axis of the vortex. From there the impurities are easily sucked into the outlet. In the investigated case viscous fluid with a given initial rotation is spinning down in a container with rigid boundaries both at the bottom and the top. The amount of fluid withdrawn through a circular hole in the center of the vortex is constantly replaced by a radial influx. The resulting time--dependent flow was solved by means of a finite difference method taking into account the influence of Ekman layers at the bottom and the top. Subsequently the process of centrifugal separation of particles lighter than the embedding fluid was studied according to the above mentioned flow field. The results were compared with the particle motion in an Oseen--vortex. For a simplified case an analytical solution was derived and compared with the corresponding numerical solution. Both results were found to be in very good agreement.
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Code-barres Cote Support Localisation Section Disponibilité ART-8563-0 ART Document imprimé Bureau chercheur Bureau de CAILLE François Disponible Journal of fluids engineering, Vol.107 No.4. Is laminar flow in a cylindrical container with a rotating cover Batchelor or Stewartson type solution ? / F. Gori
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.107 No.4 Titre : Is laminar flow in a cylindrical container with a rotating cover Batchelor or Stewartson type solution ? Type de document : articles et extraits Auteurs : F. Gori, Auteur Année de publication : 1985 Importance : p.436-437 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.107 No.4. Is laminar flow in a cylindrical container with a rotating cover Batchelor or Stewartson type solution ? [articles et extraits] / F. Gori, Auteur . - 1985 . - p.436-437.
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Code-barres Cote Support Localisation Section Disponibilité ART-8571-0 ART Document imprimé Bureau chercheur Bureau de PONCET Sébastien Disponible Journal of fluids engineering, Vol.106 No.3. Effects of free stream turbulence on low reynolds-number boundary-layers / I. P. Castro
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.106 No.3 Titre : Effects of free stream turbulence on low reynolds-number boundary-layers Type de document : articles et extraits Auteurs : I. P. Castro, Auteur Année de publication : 1984 Importance : p.298-306 ISBN/ISSN/EAN : 0098-2202 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.106 No.3. Effects of free stream turbulence on low reynolds-number boundary-layers [articles et extraits] / I. P. Castro, Auteur . - 1984 . - p.298-306.
ISSN : 0098-2202
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Code-barres Cote Support Localisation Section Disponibilité ART-8692-0 ART Document imprimé Bureau chercheur Bureau de PIETRI Laurence Disponible Journal of fluids engineering, Vol.102 No.3. Bluff body flows applicable to vehicle aerodynamics / P. W. Bearman
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.102 No.3 Titre : Bluff body flows applicable to vehicle aerodynamics Type de document : articles et extraits Auteurs : P. W. Bearman, Auteur Année de publication : 1980 Importance : p.265-274 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.102 No.3. Bluff body flows applicable to vehicle aerodynamics [articles et extraits] / P. W. Bearman, Auteur . - 1980 . - p.265-274.
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Code-barres Cote Support Localisation Section Disponibilité ART-8731-0 ART Document imprimé Bureau chercheur Bureau de GOHLKE Marc Disponible Journal of fluids engineering, Vol.127 No.4. Centrifugal Flow in a Rotor-Stator Cavity / S. Poncet
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.127 No.4 Titre : Centrifugal Flow in a Rotor-Stator Cavity Type de document : articles et extraits Auteurs : S. Poncet, Auteur ; Marie-Pierre Chauve, Auteur ; Roland Schiestel, Auteur Année de publication : 2005 Importance : p.787-794 Langues : Français (fre) Résumé : The present work considers the turbulent flow inside an annular rotor-stator cavity with and without centrifugal throughflow. Extensive measurements performed using a two-component laser-Doppler anemometer technique, and pressure transducers are compared to numerical predictions based on one-point statistical modeling using a low-Reynolds-number second-order full-stress transport closure. A study of the flow control parameters is performed, and, for the first time, a better insight into the transition from Batchelor to Stewartson types of flow is gained from this study. The advanced second-order model is confirmed to be the adequate level of closure to describe such complex flows.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.127 No.4. Centrifugal Flow in a Rotor-Stator Cavity [articles et extraits] / S. Poncet, Auteur ; Marie-Pierre Chauve, Auteur ; Roland Schiestel, Auteur . - 2005 . - p.787-794.
Langues : Français (fre)
Résumé : The present work considers the turbulent flow inside an annular rotor-stator cavity with and without centrifugal throughflow. Extensive measurements performed using a two-component laser-Doppler anemometer technique, and pressure transducers are compared to numerical predictions based on one-point statistical modeling using a low-Reynolds-number second-order full-stress transport closure. A study of the flow control parameters is performed, and, for the first time, a better insight into the transition from Batchelor to Stewartson types of flow is gained from this study. The advanced second-order model is confirmed to be the adequate level of closure to describe such complex flows.
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Code-barres Cote Support Localisation Section Disponibilité ART-8856-0 ART Document imprimé Bureau chercheur Bureau de PONCET Sébastien Disponible Journal of fluids engineering, Vol.98. A single formula for the complete velocity profile in a turbulent boundary layer / R. B. Dean
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Titre de série : Journal of fluids engineering, Vol.98 Titre : A single formula for the complete velocity profile in a turbulent boundary layer Type de document : articles et extraits Auteurs : R. B. Dean, Auteur Année de publication : 1976 Importance : p.723-727 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.98. A single formula for the complete velocity profile in a turbulent boundary layer [articles et extraits] / R. B. Dean, Auteur . - 1976 . - p.723-727.
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Code-barres Cote Support Localisation Section Disponibilité ART-8902-0 ART Document imprimé Bureau chercheur Bureau de ANSELMET Fabien Disponible Journal of fluids engineering, Vol.124 No.3. Mathematical basis and validation of the full cavitation model / A. K. Shingal
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.124 No.3 Titre : Mathematical basis and validation of the full cavitation model Type de document : articles et extraits Auteurs : A. K. Shingal, Auteur ; M. M. Athavale, Auteur ; Y. Jiang, Auteur ; H. Y. Li, Auteur Année de publication : 2002 Importance : p.617-624 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.124 No.3. Mathematical basis and validation of the full cavitation model [articles et extraits] / A. K. Shingal, Auteur ; M. M. Athavale, Auteur ; Y. Jiang, Auteur ; H. Y. Li, Auteur . - 2002 . - p.617-624.
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Code-barres Cote Support Localisation Section Disponibilité ART-9076-0 ART Document imprimé Bureau chercheur Bureau de AMIELH Muriel Disponible Journal of fluids engineering, Vol.99. Review of flow interference between two circular cylinders in various arrangements / M. M. Zdravkovich
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol.99 Titre : Review of flow interference between two circular cylinders in various arrangements Type de document : articles et extraits Auteurs : M. M. Zdravkovich, Auteur Année de publication : 1977 Importance : p.618-633 ISBN/ISSN/EAN : 0098-2202 Langues : Français (fre)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.99. Review of flow interference between two circular cylinders in various arrangements [articles et extraits] / M. M. Zdravkovich, Auteur . - 1977 . - p.618-633.
ISSN : 0098-2202
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Code-barres Cote Support Localisation Section Disponibilité ART-9079-0 ART Document imprimé Bureau chercheur Bureau de PIETRI Laurence Disponible Journal of fluids engineering, Vol.114 No.1. On the Motion of Solid Spheres Falling Through Viscous Fluids in Vertical and Inclined Tubes / J. A. C. Humphrey
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Titre de série : Journal of fluids engineering, Vol.114 No.1 Titre : On the Motion of Solid Spheres Falling Through Viscous Fluids in Vertical and Inclined Tubes Type de document : articles et extraits Auteurs : J. A. C. Humphrey, Auteur ; H. Murata, Auteur Année de publication : 1992 Importance : p.2-11 Langues : Français (fre) Note de contenu : ariel
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.114 No.1. On the Motion of Solid Spheres Falling Through Viscous Fluids in Vertical and Inclined Tubes [articles et extraits] / J. A. C. Humphrey, Auteur ; H. Murata, Auteur . - 1992 . - p.2-11.
Langues : Français (fre)
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Code-barres Cote Support Localisation Section Disponibilité ART-9433-0 ART Document imprimé Bureau chercheur Bureau de STEWART Bronwyn Disponible Journal of fluids engineering, Vol.113, No.3. A theoretical and experimental study of the characterization of bubbles using light scattering interferometry / Alejandro Brena de la Rosa
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Titre de série : Journal of fluids engineering, Vol.113, No.3 Titre : A theoretical and experimental study of the characterization of bubbles using light scattering interferometry Type de document : articles et extraits Auteurs : Alejandro Brena de la Rosa, Auteur ; W. D. Bachalo, Auteur ; B. J. Weber, Auteur ; G. Wang, Auteur ; S. V. Sankar, Auteur Année de publication : 1991 Importance : p. 460-468 Langues : Anglais (eng) Mots-clés : Bubble Geometrical shape Velocity distribution Measurement method Optical method Laser interferometer Theoretical study Experimental study Résumé : This paper details the theoretical and experimental research undertaken to determine the size and morphology of bubbles, and their dynamic characteristics such as velocity, number density, and volume flux using light scattering interferometry.^The approach is based on the measurement of the phase difference of the interference fringe pattern which is produced when a particle passing through the probe volume defined by the intersection of two laser beams scatters light and interferes n the surrounding medium.^Detailed analytical/numerical modeling of the phase Doppler approach using Mie scattering theory and the geometrical optics approximation resulted in optimum light scattering collection angles and calibration curves for bubble diagnostics.^Using several techniques to generate a steady steam of monosize bubbles in the range from 6 {mu}m to 1800 {mu}m in diameter, the measurements obtained using the phase Doppler method were compared with direct photography yielding an agreement of better than 95 percent.^The morphology of spheroidal bubbles was also investigated by placing the transmitting and receiving optical units at specified locations with respect to the scatterers.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.113, No.3. A theoretical and experimental study of the characterization of bubbles using light scattering interferometry [articles et extraits] / Alejandro Brena de la Rosa, Auteur ; W. D. Bachalo, Auteur ; B. J. Weber, Auteur ; G. Wang, Auteur ; S. V. Sankar, Auteur . - 1991 . - p. 460-468.
Langues : Anglais (eng)
Mots-clés : Bubble Geometrical shape Velocity distribution Measurement method Optical method Laser interferometer Theoretical study Experimental study Résumé : This paper details the theoretical and experimental research undertaken to determine the size and morphology of bubbles, and their dynamic characteristics such as velocity, number density, and volume flux using light scattering interferometry.^The approach is based on the measurement of the phase difference of the interference fringe pattern which is produced when a particle passing through the probe volume defined by the intersection of two laser beams scatters light and interferes n the surrounding medium.^Detailed analytical/numerical modeling of the phase Doppler approach using Mie scattering theory and the geometrical optics approximation resulted in optimum light scattering collection angles and calibration curves for bubble diagnostics.^Using several techniques to generate a steady steam of monosize bubbles in the range from 6 {mu}m to 1800 {mu}m in diameter, the measurements obtained using the phase Doppler method were compared with direct photography yielding an agreement of better than 95 percent.^The morphology of spheroidal bubbles was also investigated by placing the transmitting and receiving optical units at specified locations with respect to the scatterers. Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-1991460 BRE Document imprimé IRPHE Bibliothèque de l'IRPHE Disponible Journal of fluids engineering, Vol.117, No.4. Predictions of the structure of turbulent, highly underexpanded jets / P. S. Cumber
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Titre de série : Journal of fluids engineering, Vol.117, No.4 Titre : Predictions of the structure of turbulent, highly underexpanded jets Type de document : articles et extraits Auteurs : P. S. Cumber, Auteur ; M. Fairweather, Auteur ; S. A. E. G. Falle, Auteur ; J. R. Giddings, Auteur Année de publication : 1995 Importance : p. 599-604 Langues : Anglais (eng) Mots-clés : Free jet Axially symmetric flow Underexpanded jet Compressible fluid Modeling Turbulence structure Shock waves Velocity distribution Boundary conditions Numerical simulation Résumé : A mathematical model capable of predicting the shock and flow structure of turbulent, underexpanded jets is described. The model is based on solutions of the fluid flow equations obtained using a second-order accurate, finite-volume integration scheme together with an adaptive grid algorithm. Closure of these equations is achieved using a k-e turbulence model coupled to the compressible dissipation rate correction proposed by Sarkar et al. Extending earlier work which demonstrated the ability of this model to predict the structure of moderately underexpanded jets, the present paper compares model predictions and experimental data, reported in the literature, on a number of highly underexpanded releases. The results obtained demonstrate that the model yields reliable predictions of shock structure in the near field, inviscid region of such jets, while in the far field results derived using the compressibility corrected turbulence model are adequate for predicting meanflow properties, and are superior to those obtained using a standard k-ε approach.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.117, No.4. Predictions of the structure of turbulent, highly underexpanded jets [articles et extraits] / P. S. Cumber, Auteur ; M. Fairweather, Auteur ; S. A. E. G. Falle, Auteur ; J. R. Giddings, Auteur . - 1995 . - p. 599-604.
Langues : Anglais (eng)
Mots-clés : Free jet Axially symmetric flow Underexpanded jet Compressible fluid Modeling Turbulence structure Shock waves Velocity distribution Boundary conditions Numerical simulation Résumé : A mathematical model capable of predicting the shock and flow structure of turbulent, underexpanded jets is described. The model is based on solutions of the fluid flow equations obtained using a second-order accurate, finite-volume integration scheme together with an adaptive grid algorithm. Closure of these equations is achieved using a k-e turbulence model coupled to the compressible dissipation rate correction proposed by Sarkar et al. Extending earlier work which demonstrated the ability of this model to predict the structure of moderately underexpanded jets, the present paper compares model predictions and experimental data, reported in the literature, on a number of highly underexpanded releases. The results obtained demonstrate that the model yields reliable predictions of shock structure in the near field, inviscid region of such jets, while in the far field results derived using the compressibility corrected turbulence model are adequate for predicting meanflow properties, and are superior to those obtained using a standard k-ε approach. Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-1995599 CUM Document imprimé IRPHE Bibliothèque de l'IRPHE Disponible Journal of fluids engineering, Vol.113, No.4. An eddy viscosity calculation method for a turbulent duct flow / R. A. Antonia
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Titre de série : Journal of fluids engineering, Vol.113, No.4 Titre : An eddy viscosity calculation method for a turbulent duct flow Type de document : articles et extraits Auteurs : R. A. Antonia, Auteur ; J. Kim, Auteur ; D. K. Bisset, Auteur Année de publication : 1991 Importance : p. 616-619 Langues : Anglais (eng) Mots-clés : Turbulent boundary layer Turbulent viscosity Pipe flow Velocity distribution Reynolds stress Semiempirical method Comparative study Résumé : The mean velocity profile across a fully developed turbulent duct flow is obtained from an eddy viscosity relation combined with an empirical outer region wake function. Results are in good agreement with experiments and with direct numerical simulations in the same flow at two Reynolds numbers. In particular, the near-wall trend of the Reynolds shear stress and its variation with Reynolds number are similar to those of the simulations. The eddy viscosity method is more accurate than previous mixing length or implicit function methods.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol.113, No.4. An eddy viscosity calculation method for a turbulent duct flow [articles et extraits] / R. A. Antonia, Auteur ; J. Kim, Auteur ; D. K. Bisset, Auteur . - 1991 . - p. 616-619.
Langues : Anglais (eng)
Mots-clés : Turbulent boundary layer Turbulent viscosity Pipe flow Velocity distribution Reynolds stress Semiempirical method Comparative study Résumé : The mean velocity profile across a fully developed turbulent duct flow is obtained from an eddy viscosity relation combined with an empirical outer region wake function. Results are in good agreement with experiments and with direct numerical simulations in the same flow at two Reynolds numbers. In particular, the near-wall trend of the Reynolds shear stress and its variation with Reynolds number are similar to those of the simulations. The eddy viscosity method is more accurate than previous mixing length or implicit function methods. Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-1991616 ANT Document imprimé Bureau chercheur Bureau de Geoff Searby Disponible Journal of fluids engineering, Vol. 117, n° 3. The Vortical Structure of Parasitic Capillary Waves / R. C. Y. Mui
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol. 117, n° 3 Titre : The Vortical Structure of Parasitic Capillary Waves Type de document : articles et extraits Auteurs : R. C. Y. Mui, Auteur ; D. G. Dommermuth, Auteur Année de publication : 1995 Importance : pp. 355-361 Langues : Anglais (eng)
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol. 117, n° 3. The Vortical Structure of Parasitic Capillary Waves [articles et extraits] / R. C. Y. Mui, Auteur ; D. G. Dommermuth, Auteur . - 1995 . - pp. 355-361.
Langues : Anglais (eng)Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-1995355 DOM Document imprimé Bureau chercheur Bureau de CAULLIEZ Guillemette Disponible Journal of fluids engineering, Vol. 130, No.6. On the Flutter and Drag Forces on Flexible Rectangular Canopies in Normal Flow / Antonio Filippone
in Journal of fluids engineering, ASME transactions
Titre de série : Journal of fluids engineering, Vol. 130, No.6 Titre : On the Flutter and Drag Forces on Flexible Rectangular Canopies in Normal Flow Type de document : articles et extraits Auteurs : Antonio Filippone, Auteur Année de publication : 2008 Importance : 061203-1 - 061203-8 Langues : Anglais (eng) Résumé : The paper presents results of experimental investigations on flexible rectangular canopies fixed at two edges (tapes). Data are presented for the aerodynamic drag as a function of the planform area, the slenderness, and the Reynolds number. The slenderness varies from 3.3 to 30. The Reynolds number is limited to 2×106. The wind speed is in the range 6–19 m/s. The results show that the drag decreases with the increasing aspect ratio. The dominant parameter is the slenderness; a second dominant factor is the planform area. The drag is only weakly dependent on the Reynolds number. The analysis of the drag data indicates that a proper scaling parameter is the crosswise length scale. When normalization is done, the data tend to collapse into a single curve. A further study addressed the drag characteristics of the canopies with perforated planforms. Perforation of up to 6% of the planform area has been considered. Corrections for air permeability of the fabric are introduced. The drag is reduced roughly linearly with perforated area. A detailed study into the flutter characteristics of the canopies in the turbulent wind is presented. The investigation has highlighted different modes of oscillations, including deformations through folding and twisting, vertical flapping, rotations, and cross-type oscillations.
in Journal of fluids engineering, ASME transactions
Journal of fluids engineering, Vol. 130, No.6. On the Flutter and Drag Forces on Flexible Rectangular Canopies in Normal Flow [articles et extraits] / Antonio Filippone, Auteur . - 2008 . - 061203-1 - 061203-8.
Langues : Anglais (eng)
Résumé : The paper presents results of experimental investigations on flexible rectangular canopies fixed at two edges (tapes). Data are presented for the aerodynamic drag as a function of the planform area, the slenderness, and the Reynolds number. The slenderness varies from 3.3 to 30. The Reynolds number is limited to 2×106. The wind speed is in the range 6–19 m/s. The results show that the drag decreases with the increasing aspect ratio. The dominant parameter is the slenderness; a second dominant factor is the planform area. The drag is only weakly dependent on the Reynolds number. The analysis of the drag data indicates that a proper scaling parameter is the crosswise length scale. When normalization is done, the data tend to collapse into a single curve. A further study addressed the drag characteristics of the canopies with perforated planforms. Perforation of up to 6% of the planform area has been considered. Corrections for air permeability of the fabric are introduced. The drag is reduced roughly linearly with perforated area. A detailed study into the flutter characteristics of the canopies in the turbulent wind is presented. The investigation has highlighted different modes of oscillations, including deformations through folding and twisting, vertical flapping, rotations, and cross-type oscillations. Réservation
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Code-barres Cote Support Localisation Section Disponibilité ART-2008-061203-1 FIL Document imprimé Bureau chercheur Bureau de Laurence Pietri Disponible