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Author : Chao-Kun Chyu
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (333 download)
Download or read book A Study of the Near-wake Structure from a Circular Cylinder written by Chao-Kun Chyu and published by . This book was released on 1995 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Braza
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (11 download)
Download or read book Numerical Study of Two-dimensional Near Wake Structure of the Flow Past a Circular Cylinder Undergoing Transition written by M. Braza and published by . This book was released on 1987 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sampath K. Atluri
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (574 download)
Download or read book A Numerical Investigation of the Near Wake Structure in the Forced Oscillation of a Circular Cylinder written by Sampath K. Atluri and published by . This book was released on 2004 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vijayendra K. Rao
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (769 download)
Download or read book A Numerical Investigation of the Near Wake Structure in the Variable Frequency Forced Oscillation of a Circular Cylinder written by Vijayendra K. Rao and published by . This book was released on 2005 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jorgen Fredsoe
Publisher : World Scientific
ISBN 13 : 981449805X
Total Pages : 550 pages
Book Rating : 4.8/5 (144 download)
Download or read book Hydrodynamics Around Cylindrical Structures written by Jorgen Fredsoe and published by World Scientific. This book was released on 1997-03-17 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the subject of wave/current flow around a cylinder, the forces induced on the cylinder by the flow, and the vibration pattern of slender structures in a marine environment.The primary aim of the book is to describe the flow pattern and the resulting load which develops when waves or current meet a cylinder. Attention is paid to the special case of a circular cylinder. The development in the forces is related to the various flow patterns and is discussed in detail. Regular as well as irregular waves are considered, and special cases like wall proximities (pipelines) are also investigated.The book is intended for MSc students with some experience in basic fluid mechanics and for PhD students.
Author : L. Lourenco
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (228 download)
Download or read book Observations on the Near Wake of a Yawed Circular Cylinder written by L. Lourenco and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsteady characteristics of the near wake of a yawed circular cylinder were studied experimentally in a low speed wind tunnel and in a water towing tank facility using Particle Image Velocimetry (PIV) technique. Four different yaw angles (0, 30, 45 and 60 deg) were tested with Reynolds numbers ranging from 8,000 to 60,000. The detailed wake characteristics are described in terms of instantaneous velocity and vorticity fields obtained at a Reynolds Number of 3,900. Immediately behind the model, large scale vortical structures emerge as a result of shear layer instabilities. The amalgamation of several of these structures leads to the formation of the wake vortices. The eventual shedding of the vortices is a result of the strong interaction between two shear layers separated from the cylinder. The vortex shedding Strouhal number variation with the yaw angle does not follow the Independence Principle for yaw angles beyond 30 deg. Using momentum balance concept, the unsteady forces on the model are determined and are found to agree with established results. (Author).
Author : Symposium on Fluid Dynamics Problems of Vehicles Operating Near or in the Air-Sea Interface
Publisher :
ISBN 13 :
Total Pages : 386 pages
Book Rating : 4.E/5 ( download)
Download or read book Fluid Dynamics Problems of Vehicles Operating Near Or in the Air-sea Interface written by Symposium on Fluid Dynamics Problems of Vehicles Operating Near or in the Air-Sea Interface and published by . This book was released on 1999 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronald J. Adrian
Publisher : Cambridge University Press
ISBN 13 : 0521440084
Total Pages : 585 pages
Book Rating : 4.5/5 (214 download)
Download or read book Particle Image Velocimetry written by Ronald J. Adrian and published by Cambridge University Press. This book was released on 2011 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle image velocimetry, or PIV, refers to a class of methods used in experimental fluid mechanics to determine instantaneous fields of the vector velocity by measuring the displacements of numerous fine particles that accurately follow the motion of the fluid. Although the concept of measuring particle displacements is simple in essence, the factors that need to be addressed to design and implement PIV systems that achieve reliable, accurate, and fast measurements and to interpret the results are surprisingly numerous. The aim of this book is to analyze and explain them comprehensively.
Author : M.M. Zdravkovich
Publisher : Oxford University Press
ISBN 13 : 9780198565611
Total Pages : 628 pages
Book Rating : 4.5/5 (656 download)
Download or read book Flow Around Circular Cylinders written by M.M. Zdravkovich and published by Oxford University Press. This book was released on 1997 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text offers an authoritative compilation of experimental data, theoretical models, and computer simulations which will provide the reader with a comprehensive survey of research work on the phenomenon of flow around circular cylinders.
Author : Robert D. Blevins
Publisher :
ISBN 13 : 9781575241838
Total Pages : 477 pages
Book Rating : 4.2/5 (418 download)
Download or read book Flow-induced Vibration written by Robert D. Blevins and published by . This book was released on 2001-01-01 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on applications for offshore platforms and piping; and, wind-induced vibration of buildings, bridges, and towers. This title also focuses on acoustic and mechanical vibration of heat exchangers, power lines, and process ducting.
Author : J. Wu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (681 download)
Download or read book Spanwise Wake Structures of a Circular Cylinder and Two Circular Cylinders in Tandem written by J. Wu and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The structure of wakes downstream of cylinders is of major importance in the generation of flow-induced sound and vibration and also influences the convective heat transfer process. In particular, it is now thought that the formation of spanwise structures plays an important role. A better understanding of their development is required, and this could lead to ways of reducing both noise and vibration and to an improvement in heat and momentum transfer. Data are presented from tests carried out in a closed-circuit wind tunnel; also presented are data and flow visualizations from tests in a closed-circuit water tunnel. Hot-wire anemometer probes and pressure probes were used to measure velocity and pressure fluctuations at a number of spanwise locations in the wakes. From these measurements the spanwise coherence was calculated. The spanwise coherence increased as the distance between the cylinders in tandem was decreased; when this distance was less than three diameters, spanwise coherence at all spanwise separations was higher than for a single cylinder. Flow visualizations show the complex nature of the flow in the spanwise direction, particularly the existence of streamwise vortices. These appear to be responsible for the sharp reduction in spanwise coherence at large separations between the two cylinders in tandem. The work described is from a preliminary study with the object of developing a better understanding of near-wake flows prior to undertaking a comprehensive three-dimensional flow-field investigation.
Author : Ronald Eugene Walterick
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Experimental Investigation of the Near Wake of a Circular Cylinder written by Ronald Eugene Walterick and published by . This book was released on 1980 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near field region of the turbulent wake behind a rotating and nonrotating two dimensional circular cylinder is documented. U component mean velocities, turbulent intensities and velocity autocorrelation functions are measured at various downstream locations. From the autocorrelation functions, Taylor time microscales, longitudinal integral time scales and energy dissipation rates are computed. The measurements are performed for the flow over a circular cylinder at omega = 0 RPM and omega is approximately 500 RPM. The free stream velocity and Reynolds number, based on cylinder diameter, are respectively 5.9 m/sec and approximately 50,000. The turbulent measurements are made with a laser velocimeter using a frequency shifting phase modulator and the photon correlation processing scheme. Naturally occurring contaminant is augmented with vaporized kerosene to increase the magnitude of scattered light. Results are presented for the effects of varying omega, frequency shifting, particle concentrations and detector optics pinhole size on the turbulent quantities. (Author).
Author : Ronald E. Walterick (CIVILIAN.)
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (132 download)
Download or read book An Experimental Investigation of the Near Wake of a Circular Cylinder written by Ronald E. Walterick (CIVILIAN.) and published by . This book was released on 1980 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P Bradshaw
Publisher : Elsevier
ISBN 13 : 1483140849
Total Pages : 239 pages
Book Rating : 4.4/5 (831 download)
Download or read book An Introduction to Turbulence and its Measurement written by P Bradshaw and published by Elsevier. This book was released on 2013-10-22 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to Turbulence and Its Measurement is an introductory text on turbulence and its measurement. It combines the physics of turbulence with measurement techniques and covers topics ranging from measurable quantities and their physical significance to the analysis of fluctuating signals, temperature and concentration measurements, and the hot-wire anemometer. Examples of turbulent flows are presented. This book is comprised of eight chapters and begins with an overview of the physics of turbulence, paying particular attention to Newton's second law of motion, the Newtonian viscous fluid, and equations of motion. After a chapter devoted to measurable quantities, the discussion turns to some examples of turbulent flows, including turbulence behind a grid of bars, Couette flow, atmospheric and oceanic turbulence, and heat and mass transfer. The next chapter describes measurement techniques using hot wires, films, and thermistors, as well as Doppler-shift anemometers; glow-discharge or corona-discharge anemometers; pulsed-wire anemometer; and steady-flow techniques for fluctuation measurement. This monograph is intended for post-graduate students of aeronautics and fluid mechanics, but should also be readily understandable to those with a good general background in engineering fluid dynamics.
Author : Richard Walter Wlezien
Publisher :
ISBN 13 :
Total Pages : 139 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Experimental Investigation of the Near Wake of a Circular Cylinder in the Subcritical Regime written by Richard Walter Wlezien and published by . This book was released on 1976 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near wake of a circular cylinder in crossflow is experimentally investigated for Reynolds number 7600. The purpose is to develop techniques for characterizing the formation region of the Karman vortex street in presence of transition to turbulence and to use these techniques to examine the quasi-periodic vortex shedding phenomenon. A thermal tracer is used to tag vortical fluid in one of the cylinder boundary layers and this scalar is subsequently detected in the wake. The instantaneous phase of the amplitude and frequency modulated poly-chromatic vortex shedding phenomenon is computed using a digital Hilbert transform technique. This method is a generalization of the monochromatic complex rotating vector to processes which are modulated. The computed phase is used to conditionally sample the wake temperature using a six-sensor resistance thermo-meter array, and the resulting data are processed using statistical methods. Results demonstrate that the near wake region contains diffuse vortical fluid and this fluid has a role in the shar layer instability. The statistics also show the formation and shedding of a mean Karman vortex, and lead to a possible explanation of the modulation process. (Author).
Author : 羅志永
Publisher : Open Dissertation Press
ISBN 13 : 9781374782730
Total Pages : pages
Book Rating : 4.7/5 (827 download)
Download or read book The Flow Structures and Vortex Interaction in the Subcritical Regime in the Near Wake of a Circular Cylinder written by 羅志永 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "The Flow Structures and Vortex Interaction in the Subcritical Regime in the Near Wake of a Circular Cylinder" by 羅志永, Chi-wing, Law, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123881 Subjects: Wakes (Fluid dynamics) Cylinders - Hydrodynamics Vortex motion Flow visualization
Author : Christian Breitsamter
Publisher : Springer Science & Business Media
ISBN 13 : 3540444378
Total Pages : 428 pages
Book Rating : 4.5/5 (44 download)
Download or read book Numerical Flow Simulation I written by Christian Breitsamter and published by Springer Science & Business Media. This book was released on 2013-06-05 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
