A discrete vortex model for bluff bodies in oscillatory systems
Author: P. J. Naylor
Publisher:
Published: 1983
Total Pages:
ISBN-13:
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Author: P. J. Naylor
Publisher:
Published: 1983
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Peter John Naylor
Publisher:
Published: 1983
Total Pages: 390
ISBN-13:
DOWNLOAD EBOOKAuthor: Sohrob Mottaghi
Publisher: Springer
Published: 2019-08-08
Total Pages: 245
ISBN-13: 3030261336
DOWNLOAD EBOOKThis self-contained book provides an introduction to the flow-oscillator modeling of vortex-induced bluff-body oscillations. One of the great challenges in engineering science also happens to be one of engineering design – the modeling, analysis and design of vibrating structures driven by fluid motion. The literature on fluid–structure interaction is vast, and it can be said to comprise a large fraction of all papers published in the mechanical sciences. This book focuses on the vortex-induced oscillations of an immersed body, since, although the importance of the subject has long been known, it is only during the past fifty years that there have been concerted efforts to analytically model the general behavior of the coupling between vortex shedding and structural oscillations. At the same time, experimentalists have been gathering data on such interactions in order to help define the various regimes of behavior. This data is critical to our understanding and to those who develop analytical models, as can be seen in this book. The fundamental bases for the modeling developed in this book are the variational principles of analytical dynamics, in particular Hamilton’s principle and Jourdain’s principle, considered great intellectual achievements on par with Newton’s laws of motion. Variational principles have been applied in numerous disciplines, including dynamics, optics and quantum mechanics. Here, we apply variational principles to the development of a framework for the modeling of flow-oscillator models of vortex-induced oscillations.
Author: Kyoji Kamemoto
Publisher: World Scientific
Published: 2000-05-11
Total Pages: 228
ISBN-13: 9814493287
DOWNLOAD EBOOKVortex methods have been developed and applied to many kinds of flows related to various problems in wide engineering and scientific fields. The purpose of the First International conference on Vortex methods was to provide an opportunity for engineers and scientists to present their achievements, exchange ideas and discuss new developments in mathematical and physical modeling techniques and engineering applications of vortex methods.
Author: Vikas Krishna
Publisher:
Published: 1995
Total Pages: 168
ISBN-13:
DOWNLOAD EBOOKAuthor: National Research Council
Publisher: National Academies Press
Published: 1997-09-11
Total Pages: 1100
ISBN-13: 0309058791
DOWNLOAD EBOOKAuthor: Turgut Sarpkaya
Publisher:
Published: 1979
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKA comprehensive numerical model has been developed to investigate the characteristics of flow about a circular cylinder undergoing synchronized transverse oscillations. The model is based on the rediscretization of the shear layers, wake-boundary-layer interaction, and the dissipation of vorticity. The forces acting on the cylinder, rate of vorticity flux, Strouhal number, cylinder response, oscillations of the stagnation and separation points, longitudinal and transverse spacing of the vortices, and the base pressure have been calculated and shown to be in conformity with those obtained experimentally. The model has been used to predict the characteristics of hydroelastic oscillations of a cylinder in the range of synchronization. The numerical experiments shed considerable light on the interaction between the fluid motion in the wake and the dynamics of the body. An extensive sensitivity analysis has been carried out to determine the stability of all the parameters and hence the stability of the numerical model itself. (Author).
Author: Ray L. Shoaff
Publisher:
Published: 1978
Total Pages: 167
ISBN-13:
DOWNLOAD EBOOKA comprehensive numerical model has been developed to investigate the characteristics of flow about a circular cylinder undergoing synchronized transverse oscillations. The model is based on the rediscretization of the shear layers, wake-boundary-layer interaction, and the dissipation of vorticity. The forces acting on the cylinder, rate of vorticity flux, Strouhal number, cylinder response, oscillations of the stagnation and separation points, longitudinal and transverse spacing of the vortices, and the base pressure have been calculated and shown to be in conformity with those obtained experimentally. The model has been used to predict the characteristics of hydroelastic oscillations of a cylinder in the range of synchronization. The numerical experiments shed considerable light on the interaction between the fluid motion in the wake and the dynamics of the body. An extensive sensitivity analysis has been carried out to determine the stability of all the parameters and hence the stability of the numerical model itself. (Author).
Author:
Publisher:
Published: 1980
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKIf a fluid is in relative motion past a stationary bluff, or unstreamlined, structure and the vortex shedding frequency approaches one of the natural frequencies of the structure, then resonant flow-induced oscillations of the structure can occur when the damping of the system is sufficiently low. These resonant oscillations are accompanied by a 'lock-on' or capture of the vortex shedding frequency by the vibration frequency over a range of flow speeds, and this lock-on effect causes the wake and the structure to oscillate in unison. The periodic lift and the mean drag forces are amplified as a result of the vibrations, and changes in these fluid forces are closely related to the changes that occur in the flow field in the near wake of the body. Many practical ocean and wind engineering situations involve lightly-damped structures that are located in flows of air or water that are nonuniform along the length of the structure. The primary difference between a uniform flow and a shear flow is the presence and added complexity, in a shear flow, of vorticity whose vector is normal to the plane of the flow. When the incident flow approaches the body this vorticity is turned into the flow direction and interacts with the vortices which are shed from the body into the wake.
Author: A. T. Chwang
Publisher: Taylor & Francis Group
Published: 1996
Total Pages: 784
ISBN-13: 9789054108627
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