Periodic Flow Phenomena

Berger, Élie; Wille, Rudolf

doi:10.1146/annurev.fl.04.010172.001525

Cited by 427 publications

(122 citation statements)

References 36 publications

(51 reference statements)

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“…Eddy-shedding frequencies, f, represented by the Strouhal number, St=fd o /U o , are plotted as a function of the Reynolds number of the crossflow, with the present predicted onset of eddy shedding at Re≈40 also marked on the plot. Results shown on the figure include the measurements of Kovasznay, 39 Roshko, 40 Berger and Wille 41 and Nishioka and Sato. 42 The agreement among all the measurements and predictions is excellent.…”

Section: Computational Evaluationmentioning

confidence: 99%

Properties of Nonturbulent Round Liquid Jets in Uniform Crossflows

Aalburg

Sallam

Faeth

2004

42nd AIAA Aerospace Sciences Meeting and Exhibit

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Section: Computational Evaluationmentioning

confidence: 99%

Properties of Nonturbulent Round Liquid Jets in Uniform Crossflows

Aalburg

Sallam

Faeth

2004

42nd AIAA Aerospace Sciences Meeting and Exhibit

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“…At higher Re, the vortex streets are reestablished. Reviews of the fluid dynamics of this problem can be found in Morkovin (1964), Marris (1964), Mair and Maull (1971), and Berger and Wille (1972). …”

Section: Flow Regimesmentioning

confidence: 99%

“…Many hundreds of papers have been published and recently several reviews have been written, e.g., Marris (1964), Morkovin (1964), Mair and Maull (1971), Berger and Wille (1972), Parkinson (1974), King (1977a), Sarpkaya (1979a), and Bearman (1984).…”

Section: Introductionmentioning

confidence: 99%

Flow-Induced Vibration of Circular Cylindrical Structures

Chen

1985

151

203

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A major purpose of the Technical Information Center is to provide the broadest dissemination possible of information contained in DOE's Research and Development Reports to business, industry, the academic community, and federal, state and local governments.Although a small portion of this report is not reproducible, it is being made available to expedite the availability of information on the research discussed herein. ANL-85-51 ------------------------------ 11-6References--Sec. Current DOE funding for this work is from the Office of Reactor Systems, Development and Technology within the Office of Nuclear Energy.A significant amount of material presented in this report is taken from the results of various program activities sponsored by AEC, ERDA, and DOE at ANL.The author is indebted to those who supported the program at ANL throughout the years, in particular, Messrs. Nicholas Grossman and Chet Bigelow for their interest and recognition of this important and challenging subject.The author is grateful for the support received from his colleagues of the Vibration Analysis Section of the Components Technology Division of ANL, which provides the resources necessary to perform this work.The Section Manager, Dr. M. W. Wambsganss, with his unfaltering faith in me, gave me encouragement and confidence to complete this report.Grateful appreciation is expressed to Miss Joyce Stephens for her superb typing and word-processing and to Mrs. S. K. Zussman for her expert editing of the manuscript. 28 CREDITSThe author and Argonne National Laboratory gratefully acknowledge the courtesy of the organizations aLid individuals who granted permission to use illustrations and. other information in this report.The sources of this information are listed below. Figs. 6.3, 6.4 This report summarizes the flow-induced vibration of circular cylinders in quiescent fluid, axial flow, and crossf low, and applications of the analytical methods and experimental data in design evaluation of various system components consisting of circular cylinders.

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“…Regarding the former, there are numerous and considerable published researches. In a bare tube, extensive reviews about the effects of Reynolds number on the characteristics of the wake of a tube have been presented by Roshko [135], Berger & Wille [136] and Zdravkovich [137]. Investigation on the wake of a finned and foam-wrapped tube shows that the size of the wake behind the foam-wrapped tube is independent of Reynolds number [1].…”

Section: Introductionmentioning

confidence: 99%

“…Roshko [135]; Oertel [206]; Williamson [9]; Zdravkovich [137] and Norberg [202]), where most of their results were collected in sub-critical flow. Sub-critical flow by definition is the condition at which the boundary layer over the cylinder remains laminar and transition takes place at some points after separation.…”

Section: Introductionmentioning

confidence: 99%

Wake behind a rough (metal foam-covered) cylinder in cross-flow

Abdi¹

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The flow structures behind a circular cylinder are associated with various instabilities. These instabilities are characterized by the Reynolds number and they include the wake, separated shear layer and boundary layer. Depending on the physical application of the cylinder, increasing the level of turbulence by wrapping the cylinder with metal foam would be a target for drag reduction or heat transfer enhancement.In contrast to the extensive consideration that has been devoted to the flow around bare cylinders, the flow structures around the foam-covered cylinders and the characteristics of the wake behind such surfaces has received relatively little attention. Since the present study explores the possibility of using metal foams as replacements for fins on heat exchanger tubes, investigation on the flow-field structures downstream of a foam-covered cylinder and compare it to the bare cylinder specifies the feasibility of using the foamcovered cylinders in heat exchangers. Moreover, the outcome of this study can be used to develop an appropriate boundary condition for the porous-air interface modelling also increases the knowledge of turbulence in porous media.As it will be discussed more in detail in the following chapters, pressure drop and drag coefficient are directly linked to the wake and recirculation region, and to study these two phenomena, it is necessary to have in depth study on the flow-field down-stream of the cylinder. Hence, the purpose of this study is to investigate the wake region behind a foam- Moreover, using hot-wire anemometry, to investigate the energy of the flow inside and outside of the foam-covered cylinder's wake, let us know if a foam-covered cylinder can be treated as an obstacle to the incident flow with a rough surface or the whole foam can be considered as the combination of local jets that are coming out of the pores and disperse in random directions.III

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Periodic Flow Phenomena

Cited by 427 publications

References 36 publications

Properties of Nonturbulent Round Liquid Jets in Uniform Crossflows

Properties of Nonturbulent Round Liquid Jets in Uniform Crossflows

Flow-Induced Vibration of Circular Cylindrical Structures

Wake behind a rough (metal foam-covered) cylinder in cross-flow

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