Готові списки джерел за темами / (e/D); Flow Reynolds number

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Добірка наукової літератури з теми "(e/D); Flow Reynolds number"

Автор: Grafiati
Опубліковано: 3 червня 2025
Оновлено: 31 липня 2025

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Статті в журналах з теми "(e/D); Flow Reynolds number"

1

Oyewola, Olanrewaju Miracle, Adebunmi Okediji, Olusegun Olufemi Ajide, and Muyiwa Samuel Adaramola. "Examination of Reynolds number effect on the development of round jet flow." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 39–47. http://dx.doi.org/10.21303/2461-4262.2021.001872.

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Анотація:
In this study, the Reynolds number effect on the development of round jet flow is presented. The jet is produced from a smoothly contracting round nozzle and the flow structure is controlled by varying the air blower speed in order to obtain various Reynolds numbers (Re). The flow Reynolds number considered varies between 1140 and 9117. Mean velocity measurements were taken using hot-wire probe at different axial and lateral distances (0≤x/d≤50, where x is the downstream distance and d is the nozzle diameter) for the jet flow and at for 0≤x/d≤30 in long pipe attached to the nozzle. Measurement
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2

Oyewola, Olanrewaju Miracle, Adebunmi Okediji, Olusegun Olufemi Ajide, and Muyiwa Samuel Adaramola. "Examination of Reynolds number effect on the development of round jet flow." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 39–47. https://doi.org/10.21303/2461-4262.2021.001872.

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Анотація:
In this study, the Reynolds number effect on the development of round jet flow is presented. The jet is produced from a smoothly contracting round nozzle and the flow structure is controlled by varying the air blower speed in order to obtain various Reynolds numbers (Re). The flow Reynolds number considered varies between 1140 and 9117. Mean velocity measurements were taken using hot-wire probe at different axial and lateral distances (0≤x/d≤50, where x is the downstream distance and d is the nozzle diameter) for the jet flow and at for 0≤x/d≤30 in long pipe attached to the nozzle. Measurement
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3

Pirozzoli, Sergio, Paolo Orlandi, and Matteo Bernardini. "The fluid dynamics of rolling wheels at low Reynolds number." Journal of Fluid Mechanics 706 (July 20, 2012): 496–533. http://dx.doi.org/10.1017/jfm.2012.273.

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AbstractWe study the fluid dynamics of rolling wheels at Reynolds number ${\mathit{Re}}_{D} \leq 1000$ (where ${\mathit{Re}}_{D} $ is the Reynolds number based on the wheel diameter), with the objective of characterizing the various regimes of steady and unsteady motion. Regardless of the Reynolds number, the flow is found to separate approximately $1{0}^{\ensuremath{\circ} } $ upstream of the apex of the wheel, where a saddle point in the pseudo-streamtrace pattern is observed. Under the flow conditions here essayed, the drag coefficient steadily decreases with ${\mathit{Re}}_{D} $, and the l
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4

Shaikh Sohel Mohd Khalil, Rai Sujit Nath Sahai, Nitin Parashram Gulhane, Khizar Ahmed Pathan, Ajaj Rashid Attar, and Sher Afghan Khan. "Experimental Investigation of Local Nusselt Profile Dissemination to Augment Heat Transfer under Air Jet Infringements for Industrial Applications." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 112, no. 2 (2024): 161–73. http://dx.doi.org/10.37934/arfmts.112.2.161173.

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An experimental study is presented in this paper to evaluate the enhancement of heat transfer characteristics. This includes the study of a steady air jet impinging on a planar aluminum plate with constant heat flux. Extensive industrial applications of heat transfer include electronic heat sinks, the food industry, automobiles, and heat exchangers. The magnitude of the local Nusselt number along the streamwise direction is determined through detailed experimental computation using the infrared radiometry technique. The range of Reynolds number was selected between 6500 ≤ Re ≤ 15000 and the ai
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5

Duong, Viet Dung, Van Duc Nguyen, Van Tien Nguyen, and Ich Long Ngo. "Low-Reynolds-number wake of three tandem elliptic cylinders." Physics of Fluids 34, no. 4 (2022): 043605. http://dx.doi.org/10.1063/5.0086685.

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Анотація:
The flow around three elliptic cylinders with equal spacing and aspect ratio in tandem arrangements was numerically investigated through direct numerical simulation. The spacing ratio ( L/ D, where D and L are the major axis and the center-to-center distance of two adjacent elliptic cylinders, respectively) ranging from 1.5 to 10 and the Reynolds numbers of [Formula: see text] (based on D) are examined. The analysis aims at the effects of L/ D and Re on wake structures, hydrodynamic forces, and Strouhal numbers and correlates them with the underlying flow physics. The flow is highly changeable
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6

Alabas Siba, Mohamed Abed, Wan Mohd Faizal Wan Mahmood, Mohd Zaki Nuawi, and Rasidi Rasani. "Numerical Investigation of 3-D Turbulent Flow in Orifice Plate within a Pipe." Applied Mechanics and Materials 761 (May 2015): 27–31. http://dx.doi.org/10.4028/www.scientific.net/amm.761.27.

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A numerical study of the turbulent flow in an orifice plate within a pipe is carried out by utilizing the Navier-Stokes (N-S) equations. The governing equations are solved using primitive variables with a finite volume method (FVM) and simulated using the finite volume based commercial CFD code ANSYS. The study investigates the influences of Reynolds numbers (Re = 5000, 10000, and 15000) and aspect ratio (β = 0.2, 0.3, and 0.5), on the flow characteristics, i.e. the velocity profile, the differential pressure, and the vorticity, and on the mechanical properties, i.e. the strain, the stress, an
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7

Gao, Yang-yang, Chang-shan Yin, Hao-qiang Zhang, Kang Yang, Xi-zeng Zhao, and Zhilin Sun. "Numerical Study on Flow around Four Square-Arranged Cylinders at Low Reynolds Numbers." Mathematical Problems in Engineering 2017 (2017): 1–18. http://dx.doi.org/10.1155/2017/6381256.

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In this paper, numerical simulations of flow past four square-arranged cylinders are carried out at different spacing ratios (1.5≤L/D≤5.0; L is the center to center distance; D is the cylinder diameter) and Reynolds numbers (100≤Re≤1000). The effects of spacing ratio and Reynolds number on the wake flow characteristics are investigated, such as the instantaneous vorticity contours, force coefficients, and vortex shedding frequencies. The results show that the flow characteristics behind the four-cylinder cases are significantly affected by the spacing ratios and Reynolds numbers. At the same s
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8

Sakamoto, H., and H. Haniu. "A Study on Vortex Shedding From Spheres in a Uniform Flow." Journal of Fluids Engineering 112, no. 4 (1990): 386–92. http://dx.doi.org/10.1115/1.2909415.

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Vortex shedding from spheres at Reynolds numbers from 3 × 102 to 4 × 104 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) t
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9

Alabas Siba, Mohamed Abed, Wan Mohd Faizal Wan Mahmood, Mohd Zaki Nuawi, Rasidi Rasani, and Mohamed Nassir. "Investigation of Physical and Mechanical Properties of 3-D Turbulent Flow in Orifice Pipe." Applied Mechanics and Materials 819 (January 2016): 330–34. http://dx.doi.org/10.4028/www.scientific.net/amm.819.330.

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Анотація:
The turbulent flow in orifice plate was investigated and solved numerically using 3-D Navier-Stockes (N-S) equations by employing commercial CFD code ANSYS. The N-S equations were solved for unsteady flow of an orifice plate at different values of Reynolds number, Re=ρVDμ, and different aspect ratios, β=dorificedpipe. Physical parameters such as velocity, differential pressure, and vorticity and mechanical properties such as stress, strain, and total deformation were examined for Reynolds numbers of 10000, 20000, and 30000 and at aspect ratios β of 0.2, 0.4, and 0.6. It was found that as Reyno
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10

Popiel, C. O., and D. F. van der Merwe. "Friction Factor In Sine-Pipe Flow." Journal of Fluids Engineering 118, no. 2 (1996): 341–45. http://dx.doi.org/10.1115/1.2817383.

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Анотація:
Measurements of pressure losses in a sine-waved hydraulically smooth pipe, having a centerline described by the formula y = h sin (2πx/λ), are presented. The effect of the dimensionless wave-length (λ/d) and amplitude (h/d) on the Darcy friction factor was investigated in the range of the Reynolds number from about 100 to 10 000, and in the ranges of wavelength from λ/d = 17.7 to 150 and amplitude from h/d = 1.5 to 32. The Dean number, based on the minimum radius of the sine-waved centerline curvature, below which the influence of the sine-pipe shape in comparison to the straight tube was not
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Дисертації з теми "(e/D); Flow Reynolds number"

1

Trivilos, Epameinondas. "Performance and flow regimes in plane 2-D diffusers with exit channels at low Reynolds numbers." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FTrivilos.pdf.

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Анотація:
Thesis (Mechanical Engineer and M.S. in Mechanical Engineering)--Naval Postgraduate School, September 2003.<br>Thesis advisor(s): Knox T. Millsaps. Includes bibliographical references (p. 79-80). Also available online.
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2

König, Franziska [Verfasser], and Christoph [Akademischer Betreuer] Egbers. "Investigation of high Reynolds number pipe flow - CoLaPipe experiments / Franziska König ; Betreuer: Christoph Egbers." Cottbus : BTU Cottbus - Senftenberg, 2015. http://d-nb.info/1114283894/34.

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3

Fleming, Jonathan Lee. "Experimental investigation of the near wall flow structure of a low Reynolds number 3-D turbulent boundary layer." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/39120.

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Анотація:
Laser Doppler velocimetry (LDV) measurements and hydrogen-bubble flow-visualization techniques were used to examine the near-wall flow structure of 2-D and 3-D turbulent boundary layers (TBLs) over a range of low Reynolds numbers. The goals of this research were (1) an increased understanding of the flow physics in the near wall region of turbulent boundary layers, (2) to observe and quantify differences between 2-D and 3-D TBL flow structures, and (3) to document Reynolds number effects for 3-D TBLs. An ultimate application of this work would be to improve turbulence modeling for 3-D flows.
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4

Gharakhani, Adrin. "A 3-D vortex-boundary element method for the simulation of unsteady, high Reynolds number flows." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11255.

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5

Kai, Yun [Verfasser], Ulrich [Akademischer Betreuer] Teubner, and Joachim [Akademischer Betreuer] Peinke. "Micro shock wave: a study of supersonic compressible flow with low Reynolds number by application of ultra short laser pulse and interferometry / Yun Kai ; Ulrich Teubner, Joachim Peinke." Oldenburg : BIS der Universität Oldenburg, 2018. http://d-nb.info/1162620870/34.

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6

Spiller, Martin [Verfasser]. "Physical and Numerical Experiments of Flow and Transport in Heterogeneous Fractured Media : Single Fracture Flow at High Reynolds Numbers, and Reactive Particle Transport / Martin Spiller." Aachen : Shaker, 2005. http://d-nb.info/1186587210/34.

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7

Fassbender, Jens K. [Verfasser]. "Improved robustness for numerical simulation of turbulent flows around civil transport aircraft at flight Reynolds numbers / Institute of Aerodynamics and Flow Technology Braunschweig. Jens K. Fassbender." Köln : DLR, Bibliotheks- und Informationswesen, 2003. http://d-nb.info/971638691/34.

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8

Yuvaraj, Rakesh. "Analyse de la cascade d’ ́energie dans une couche limite turbulente." Electronic Thesis or Diss., Centrale Lille Institut, 2021. http://www.theses.fr/2021CLIL0012.

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Анотація:
Ce travail consiste à étudier la cascade d’ énergie échelle par échelle dans les écoulements turbulents limités par des parois. L’ équation de Karman-Howarth-Monin-Hill (KHMH)est une équation d’ évolution de δu2, qui est directement liée au contenu énergétique dans l’espace des échelles et intègre différents processus associés aux transferts d’énergie dans l’espace physique et l’espace d’échelle (cascade). Le pic de la moyenne spatio-temporelle du terme cascade se met `a l’ échelle avec la micro- échelle de Taylor modifié dans une région éloignée de la paroi. Le terme de dérivée temporelle mod
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9

Vey, Stefan [Verfasser], Christian Oliver [Akademischer Betreuer] Paschereit, David [Akademischer Betreuer] Greenblatt, and Kunihiko [Akademischer Betreuer] Taira. "Low aspect ratio wing flow control at low reynolds numbers / Stefan Vey. Gutachter: Christian Oliver Paschereit ; David Greenblatt ; Kunihiko Taira. Betreuer: Christian Oliver Paschereit." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1065669720/34.

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10

Srinivasa, Murthy P. "Low Reynolds Number Airfoil Aerodynamics." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/229.

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In this thesis we describe the development of Reynolds- averaged Navier Stokes code for the flow past two- dimensional configuration. Particularly, emphasis has been laid on the study of low Reynolds number airfoil aerodynamics. The thesis consists of five chapters covering the back ground history, problem formulation, method of solution and discussion of the results and conclusion. Chapter I deals with a detailed background history of low Reynolds number aerodynamics, problem associated with it, state of the art, its importance in practical applications in aircraft industries. Chapte
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Книги з теми "(e/D); Flow Reynolds number"

1

Elsenaar, A. Reynolds number effects in transonic flow. AGARD, 1988.

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2

Whalen, Margaret V. Low Reynolds number nozzle flow study. National Aeronautics and Space Administration, 1987.

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3

Kohr, Mirela. Viscous incompressible flow for low Reynolds numbers. WIT, 2004.

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4

1940-, Shih Tsan-Hsing, and United States. National Aeronautics and Space Administration., eds. Low Reynolds number two-equation modeling of turbulent flows. NASA, 1991.

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5

Sandborn, Virgil A. Evaluation of high reynolds number flow in a 180 degree turn-around duct. National Aeronautics and Space Administration, 1991.

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6

J, Yoo G., and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. On the modeling of low-Reynolds-number turbulence. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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7

J, Yoo G., and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. On the modeling of low-Reynolds-number turbulence. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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8

So, Ronald M. C. On the modeling of low-Reynolds-number turbulence. Lewis Research Center, 1986.

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9

Smits, Alexander J., ed. IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0997-3.

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10

Nikas, Konstantinos-Stephen P. Low-Reynolds number computations of flow through rotating cavities. UMIST, 1995.

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Частини книг з теми "(e/D); Flow Reynolds number"

1

Li, Zhihui. "Numerical Simulation of Convective Heat Transfer of CO2 in a Tube Under Supercritical Pressure at Low Reynolds Numbers." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_76.

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AbstractThe supercritical carbon dioxide (S-CO2) Brayton cycle has the advantages of compact layout, simple structure, high thermal efficiency, clean working quality, its application in lead-cooled fast reactor power conversion system helps the miniaturization and modularization of the whole system. The development of an efficient and compact supercritical CO2 heat exchanger has important reference significance for improving the thermal efficiency of the system of lead-cooled fast reactor. Supercritical CO2 can operate in high Reynolds number turbulence and low Reynolds number turbulence in he
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2

Persillon, H., M. Braza, H. Ha Minh, and C. H. K. Williamson. "Non-Linear Instabiliy and 3-D Transition in the Flow Past a Circular Cylinder at Low Reynolds Number." In IUTAM Symposium on Nonlinear Instability and Transition in Three-Dimensional Boundary Layers. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1700-2_20.

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3

Pozrikidis, C. "High-Reynolds-number flow." In Fluid Dynamics. Springer US, 2016. http://dx.doi.org/10.1007/978-1-4899-7991-9_10.

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4

Pozrikidis, C. "Low-Reynolds-number flow." In Fluid Dynamics. Springer US, 2016. http://dx.doi.org/10.1007/978-1-4899-7991-9_9.

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5

Pozrikidis, Constantine. "High Reynolds Number Flow." In Fluid Dynamics. Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-95871-2_10.

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6

Pozrikidis, Constantine. "Low Reynolds Number Flow." In Fluid Dynamics. Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-95871-2_9.

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7

Lauchle, Gerald C., Michael L. Billet, and Steven Deutsch. "High-Reynolds Number Liquid Flow Measurements." In Lecture Notes in Engineering. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83831-6_3.

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8

Wagner, C., and R. Friedrich. "Reynolds stress budgets of low Reynolds number pipe expansion flow." In Advances in Turbulence VI. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0297-8_13.

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9

Brewer, Wesley H., Stuart D. Jessup, and Young T. Shen. "Reynolds Number Scaling of Leakage Vortex Flow." In IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0997-3_53.

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10

Kuwahara, Kunio. "Development of High-Reynolds-Number-Flow Computaion." In Lecture Notes in Engineering. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82908-6_3.

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Тези доповідей конференцій з теми "(e/D); Flow Reynolds number"

1

Thurman, Douglas, Philip Poinsatte, Paul Giel, and Barbara Lucci. "Heat Transfer Measurements on the Endwall of a Variable Speed Power Turbine Blade Cascade." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12868.

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Heat transfer measurements were obtained on the planar endwall of a 2-D section of a variable speed power turbine (VSPT) rotor blade in a linear cascade. Infrared thermography was used to determine the endwall heat transfer distribution. Changes in the local heat transfer rates with Reynolds number were used to identify the laminar, turbulent, and transitional flow regimes, as well as to determine regions of flow separation. Steady state data were obtained for six incidence angles ranging from +15.8° to –51.0°, and at five flow conditions for each angle. Reynolds numbers were varied over an or
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2

Lamont, P., D. Poll, and R. Taghavi-Zenouz. "Reynolds number effects on the flow around 2-D ellipses at incidence." In 33rd Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-366.

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3

Kanda, Hidesada, and Takayuki Yanagiya. "Experimental Conditions for Minimum Critical Reynolds Number in Pipe Flow." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80637.

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From the results of many experiments carried out in the past, it is clear that the transition between laminar and turbulent flows occurs in the entrance region, and that the critical Reynolds number (Rc) is governed by the shape of the bellmouth entrance. To date, it has not been considered how a bellmouth-shaped entrance affects the flow in pipes. If it governs the transition, the turbulence can be controlled. These findings are verified by reproducing Reynolds color-dye experiments, in particular, varying the ratio of the bellmouth diameter to pipe diameter (BD/D). CASE I through IV are devi
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4

Xu, S. J., Y. Zhou, and R. M. C. So. "Reynolds Number Dependence of the Flow Structure Behind Two Side-by-Side Cylinders." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32176.

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The wake structure of two side-by-side cylinders was experimentally investigated using flow visualization and hotwire techniques. The investigation was focused on the asymmetrical flow regime, i.e., T/d = 1.2 – 1.6, where T is the center-to-center cylinder spacing and d is the cylinder diameter. Experiments were conducted in both water and wind tunnels at a Reynolds number (Re) range of 150 – 14300. It has been found that, as Re increases, the flow structure behind the cylinders would change from one single vortex street to two streets with one narrow and one wide, for the same T/d. The one-st
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5

Chishty, Muhammad Aqib, Hossein Raza Hamdani, Khalid Parvez, and Muhammad Nafees Mumtaz Qadri. "Study of Flow Controlling on LP Turbine at Different Reynolds Number." In ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72094.

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Active and passive techniques have been used in the past, to control flow separation. Numerous studies were published on controlling and delaying the flow separation on low pressure turbine. In this study, a single dimple (i.e. passive device) is engraved on the suction side of LP turbine cascade T106A. The main aim of this research is to find out the optimum parameters of dimple i.e. diameter (D) and depth (h) which can produce strong enough vortex that can control the flow either in transition or fully turbulent phase. Furthermore, this optimal dimple is engraved to suppress the boundary lay
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6

Dominy, R. G., and H. P. Hodson. "An Investigation of Factors Influencing the Calibration of 5-Hole Probes for 3-D Flow Measurements." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-216.

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The effects of Reynolds number, Mach number and turbulence on the calibrations of commonly used types of 5-hole probe are discussed. The majority of the probes were calibrated at the exit from a transonic nozzle over a range of Reynolds numbers (7×103 &lt; 80×103 based an probe tip diameter) at subsonic and transonic Mach numbers. Additional information relating to the flow structure were obtained from a large scale, low speed wind tunnel. The results confirmed the existence of two distinct Reynolds number effects. Flow separation around the probe head affects the calibrations at relatively lo
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7

Chua, Ming Han, and Bin Liu. "Active Flow Control of Flow Over a Stationary Cylinder Using a Flapping Rod at Low Reynolds Number." In ASME 2024 43rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/omae2024-120822.

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Abstract A numerical investigation of the active flow control mechanism of flow over a stationary circular cylinder using a flapping rod was conducted at low Reynolds number. The Galerkin-least-square (GLS) stabilized Finite Element formulation in Arbitrary Lagrangian-Eulerian (ALE) description is employed to investigate the fluid dynamics and structural motions in the simulations. A rotating dynamic mesh model is utilized to precisely trace the flapping dynamics of the control rod in the wake downstream. A control rod of very small diameter (d = 0.1) is used as an active flow control mechanis
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8

Wong, C. W., Y. Zhou, and S. X. Feng. "The Reynolds Number Effect on Flow Classification in the Wake of Two Staggered Cylinders." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87066.

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This work aims to investigate, based on the Strouhal number St and the flow structure, the dependence of flow classification on the Reynolds number Re in the wake of two staggered cylinders, with Re varying from 1.5×103 and 2.0×104. The cylinder centre-to-centre pitch, P* = P/d examined is 1.2 ∼ 6.0 (d is the cylinder diameter), and the angle (α) between the incident flow and the line through the cylinder centres is 0° ∼ 90°. Two single hotwires were used to measure simultaneously the St behind each of the two cylinders over 2.5d ∼ 15d. Whilst the present data reconfirms the flow structure mod
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9

Ando, Toshitake, Toshihiko Shakouchi, Yoshitaka Suzuki, and Koichi Tsujimoto. "Effects of Reynolds Number on Drag Reduction in T-Junction Pipes due to Small Obstacles." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-13009.

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T-junction pipes are used to distribute one flow into two flows or join two flows into one flow. Separated vortex flow regions near the corners of junctions are caused in these types of flows. They reduce the effective cross-sectional area of the pipe flows and then create large flow resistance or drag. The corners of junctions are generally rounded to avoid flow separation and reduce flow resistance. We tried to reduce the flow resistance of counter-flow T-junction pipes in which two flows in the opposite direction entered the junction, mixed, and then vertically flowed out together by using
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10

Lynch, Kyle, and Brian Thurow. "POD Analysis of 3-D Flow Visualization Images of a Circular Jet with Reynolds Number 9500." In 39th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-4303.

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Звіти організацій з теми "(e/D); Flow Reynolds number"

1

Knight, Doyle D., and Hadassah Naiman. Towards High-Reynolds Number Quiet Flow in Hypersonic Tunnels. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada498212.

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2

Schneider, Steven P. Towards High-Reynolds-Number Quiet Flow in Hypersonic Wind Tunnels. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada500049.

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3

Bianchi, J. Christopher. Velocity measurements of low Reynolds number tube flow using fiber-optic technology. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10140118.

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4

Bianchi, J. C. Velocity measurements of low Reynolds number tube flow using fiber-optic technology. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/6625783.

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5

Bettin, Giorgia. Evaluation of Computational Method of High Reynolds Number Slurry Flow for Caverns Backfilling. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1179537.

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6

Ghia, K., and U. Ghia. Development of LES Methodology for the Analysis of High-Reynolds Number 2-D and 3-D Dynamic Stall Phenomenon. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada335686.

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7

Rui Shi, Davide Wüthrich, and Hubert Chanson. Intrusive and Non-intrusive Air-water Flow Measurements in Breaking Jumps at Low Froude Number and Large Reynolds Number. The University of Queensland, 2021. http://dx.doi.org/10.14264/4a0c07f.

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8

Bhushan, Shanti, Greg Burgreen, Wesley Brewer, and Ian Dettwiller. Assessment of neural network augmented Reynolds averaged Navier Stokes turbulence model in extrapolation modes. Engineer Research and Development Center (U.S.), 2025. https://doi.org/10.21079/11681/49702.

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Анотація:
A machine-learned model enhances the accuracy of turbulence transport equations of RANS solver and applied for periodic hill test case. The accuracy is investigated in extrapolation modes. A parametric study is also performed to understand the effect of network hyperparameters on training and model accuracy and to quantify the uncertainty in model accuracy due to the non-deterministic nature of the neural network training. For any network, less than optimal mini-batch size results in overfitting, and larger than optimal reduces accuracy. Data clustering is an efficient approach to prevent the
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9

Ayoul-Guilmard, Q., S. Ganesh, M. Nuñez, et al. D5.3 Report on theoretical work to allow the use of MLMC with adaptive mesh refinement. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.002.

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This documents describes several studies undertaken to assess the applicability of MultiLevel Monte Carlo (MLMC) methods to problems of interest; namely in turbulent fluid flow over civil engineering structures. Several numerical experiments are presented wherein the convergence of quantities of interest with mesh parameters are studied at different Reynolds’ numbers and geometries. It was found that MLMC methods could be used successfully for low Reynolds’ number flows when combined with appropriate Adaptive Mesh Refinement (AMR) strategies. However, the hypotheses for optimal MLMC performanc
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10

Ayoul-Guilmard, Q., S. Ganesh, M. Nuñez, et al. D5.4 Report on MLMC for time dependent problems. Scipedia, 2021. http://dx.doi.org/10.23967/exaqute.2021.2.005.

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Анотація:
In this report, we study the use of Multi-Level Monte Carlo (MLMC) methods for time dependent problems. It was found that the usability of MLMC methods depends strongly on whether or not the underlying time dependent problem is chaotic in nature. Numerical experiments are conducted on both simple problems, as well as fluid flow problems of practical interest to the ExaQUte project, to demonstrate this. For the non-chaotic cases, the hypotheses that enable the use of MLMC methods were found to be satisfied. For the chaotic cases, especially the case of high Reynolds’ number fluid flow, the hypo
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