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Rotating Flow

Rotating Flow
Author: Peter Childs
Publisher: Elsevier
Total Pages: 415
Release: 2010-10-29
Genre: Science
ISBN: 0123820995

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Rotating flow is critically important across a wide range of scientific, engineering and product applications, providing design and modeling capability for diverse products such as jet engines, pumps and vacuum cleaners, as well as geophysical flows.Developed over the course of 20 years’ research into rotating fluids and associated heat transfer at the University of Sussex Thermo-Fluid Mechanics Research Centre (TFMRC), Rotating Flow is an indispensable reference and resource for all those working within the gas turbine and rotating machinery industries.Traditional fluid and flow dynamics titles offer the essential background but generally include very sparse coverage of rotating flows—which is where this book comes in. Beginning with an accessible introduction to rotating flow, recognized expert Peter Childs takes you through fundamental equations, vorticity and vortices, rotating disc flow, flow around rotating cylinders and flow in rotating cavities, with an introduction to atmospheric and oceanic circulations included to help deepen understanding.Whilst competing resources are weighed down with complex mathematics, this book focuses on the essential equations and provides full workings to take readers step-by-step through the theory so they can concentrate on the practical applications. A detailed yet accessible introduction to rotating flows, illustrating the differences between flows where rotation is significant and highlighting the non-intuitive nature of rotating flow fields Written by world-leading authority on rotating flow, Peter Childs, making this a unique and authoritative work Covers the essential theory behind engineering applications such as rotating discs, cylinders, and cavities, with natural phenomena such as atmospheric and oceanic flows used to explain underlying principles Provides a rigorous, fully worked mathematical account of rotating flows whilst also including numerous practical examples in daily life to highlight the relevance and prevalence of different flow types Concise summaries of the results of important research and lists of references included to direct readers to significant further resources


The Flow Over a Rotating Cylinder

The Flow Over a Rotating Cylinder
Author: Carlos Villeda
Publisher:
Total Pages: 104
Release: 2017
Genre:
ISBN:

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"The flow over a cylinder is an important area of research due to its application of the lift and drag coefficients to the design of airfoils and buildings. In early studies of the lift coefficient, there was debate whether or not it has a limiting value of 4[pi]. Numerical and experimental studies have shown it is possible to exceed this limit. This work analyzes the lift and drag coefficients by constructing a piecewise function of the flow. The flow field is composed of two regions. The first region is the boundary layer flow near the surface of the cylinder in which a fourth order series approximation to the steady state boundary layer equations is found under the assumption that flow separation is suppressed; and second is assumed to be the potential flow around the cylinder. The function was made to ensure that the velocities were continuous at the boundary. The lift and drag coefficients are calculated by integrating the surface pressure found by Bernoulli’s equations. This model shows that the net drag on the cylinder is zero known as D’Alembert’s paradox. The lift coefficient is found to be dependent on the rotation, Reynold’s number, and the boundary layer thickness. Letting the boundary layer thickness be a certain function of the Reynold’s number, the lift becomes independent of the boundary layer thickness and Reynold’s number. This modified lift coefficient is in agreement with the literature when rotation is high. Lifting the dependence of the Reynold’s number on the boundary layer thickness, the results show that there is an inverse relationship between then boundary layer thickness and the Reynold’s number but a direct relationship to the rotation."--


Hydrodynamics Around Cylindrical Structures

Hydrodynamics Around Cylindrical Structures
Author: Jorgen Fredsoe
Publisher: World Scientific
Total Pages: 550
Release: 1997-03-17
Genre:
ISBN: 981449805X

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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.


Flow Around Circular Cylinders

Flow Around Circular Cylinders
Author: M.M. Zdravkovich
Publisher: Oxford University Press
Total Pages: 628
Release: 1997
Genre: Mathematics
ISBN: 9780198565611

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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.


Modelling of Convective Heat and Mass Transfer in Rotating Flows

Modelling of Convective Heat and Mass Transfer in Rotating Flows
Author: Igor V. Shevchuk
Publisher: Springer
Total Pages: 253
Release: 2015-07-24
Genre: Science
ISBN: 3319209612

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This monograph presents results of the analytical and numerical modeling of convective heat and mass transfer in different rotating flows caused by (i) system rotation, (ii) swirl flows due to swirl generators, and (iii) surface curvature in turns and bends. Volume forces (i.e. centrifugal and Coriolis forces), which influence the flow pattern, emerge in all of these rotating flows. The main part of this work deals with rotating flows caused by system rotation, which includes several rotating-disk configurations and straight pipes rotating about a parallel axis. Swirl flows are studied in some of the configurations mentioned above. Curvilinear flows are investigated in different geometries of two-pass ribbed and smooth channels with 180° bends. The author demonstrates that the complex phenomena of fluid flow and convective heat transfer in rotating flows can be successfully simulated using not only the universal CFD methodology, but in certain cases by means of the integral methods, self-similar and analytical solutions. The book will be a valuable read for research experts and practitioners in the field of heat and mass transfer.