Vortex Ring Models

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Vortex Ring Models

Author : Ionut Danaila
Publisher : Springer Nature
ISBN 13 : 3030681505
Total Pages : 206 pages
Book Rating : 4.0/5 (36 download)

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Book Synopsis Vortex Ring Models by : Ionut Danaila

Download or read book Vortex Ring Models written by Ionut Danaila and published by Springer Nature. This book was released on 2021-04-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a guide to understanding models of vortex rings, starting from classical ones (circular vortex filament, Hill and Norbury-Fraenkel inviscid models) to very recent models incorporating viscous effects and realistic shapes of the vortex core. Unconfined and confined viscous vortex rings are described by closed formulae for vorticity, stream function, translational velocity, energy, impulse and circulation. Models are applied to predict the formation number of optimal vortex rings and to describe two-phase vortex ring-like structures generated in internal combustion engines. The book provides a detailed presentation of analytical developments of models, backed up by illustrations and systematic comparisons with results of direct numerical simulations. The book is useful for graduate students in applied mathematics, engineering and physical sciences. It is a useful reference for researchers and practising engineers interested in modelling flows with vortex rings.

Vortex Ring Models

Author : Ionut Danaila
Publisher :
ISBN 13 : 9783030681517
Total Pages : 0 pages
Book Rating : 4.6/5 (815 download)

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Book Synopsis Vortex Ring Models by : Ionut Danaila

Download or read book Vortex Ring Models written by Ionut Danaila and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a guide to understanding models of vortex rings, starting from classical ones (circular vortex filament, Hill and Norbury-Fraenkel inviscid models) to very recent models incorporating viscous effects and realistic shapes of the vortex core. Unconfined and confined viscous vortex rings are described by closed formulae for vorticity, stream function, translational velocity, energy, impulse and circulation. Models are applied to predict the formation number of optimal vortex rings and to describe two-phase vortex ring-like structures generated in internal combustion engines. The book provides a detailed presentation of analytical developments of models, backed up by illustrations and systematic comparisons with results of direct numerical simulations. The book is useful for graduate students in applied mathematics, engineering and physical sciences. It is a useful reference for researchers and practising engineers interested in modelling flows with vortex rings. .

Vortex Rings

Author : D. G. Akhmetov
Publisher : Springer Science & Business Media
ISBN 13 : 3642050166
Total Pages : 149 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Vortex Rings by : D. G. Akhmetov

Download or read book Vortex Rings written by D. G. Akhmetov and published by Springer Science & Business Media. This book was released on 2009-11-24 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex flow is one of the fundamental types of fluid and gas motion. These flows are the most spectacular in the form of concentrated vortices, characterized by the localization of vorticity (curl of velocity) in bounded regions of a space, beyond which the vorticity is either absent or rapidly falls down to zero. Concentrated vortices are often observed in nature, exemplified by atmospheric cyclones, whirlwinds and tornados, oceanic vortices, whirlpools on a water s- face, and ring vortices caused by explosive outburst of volcanoes. In technical - vices concentrated vortices form when flow separates from sharp edges of flying vehicles and ships. Among these are vortices flowing off the ends of airplane wings, and intentionally generated vortices for intensification of burning in c- bustion chambers, vortices in cyclonic devices used for mixing or separation of impurities in fluids and gases. One such remarkable and frequent type of conc- trated vortices is a vortex ring which constitutes a vortex tube closed into a t- oidal ring moving in a surrounding fluid like an isolated body out of contact with solid boundaries of the flow region if such boundaries exist. Formation and motion of vortex rings are important part of the dynamics of a continuum medium and have been studied for more than a century.

Fluid Vortices

Author : Sheldon Green
Publisher : Springer Science & Business Media
ISBN 13 : 940110249X
Total Pages : 905 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Fluid Vortices by : Sheldon Green

Download or read book Fluid Vortices written by Sheldon Green and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 905 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid Vortices is a comprehensive, up-to-date, research-level overview covering all salient flows in which fluid vortices play a significant role. The various chapters have been written by specialists from North America, Europe and Asia, making for unsurpassed depth and breadth of coverage. Topics addressed include fundamental vortex flows (mixing layer vortices, vortex rings, wake vortices, vortex stability, etc.), industrial and environmental vortex flows (aero-propulsion system vortices, vortex-structure interaction, atmospheric vortices, computational methods with vortices, etc.), and multiphase vortex flows (free-surface effects, vortex cavitation, and bubble and particle interactions with vortices). The book can also be recommended as an advanced graduate-level supplementary textbook. The first nine chapters of the book are suitable for a one-term course; chapters 10--19 form the basis for a second one-term course.

Vortex Rings and Jets

Author : Daniel T. H. New
Publisher : Springer
ISBN 13 : 9812873961
Total Pages : 235 pages
Book Rating : 4.8/5 (128 download)

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Book Synopsis Vortex Rings and Jets by : Daniel T. H. New

Download or read book Vortex Rings and Jets written by Daniel T. H. New and published by Springer. This book was released on 2015-03-26 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, recent developments in our understanding of fundamental vortex ring and jet dynamics will be discussed, with a view to shed light upon their near-field behaviour which underpins much of their far-field characteristics. The chapters provide up-to-date research findings by their respective experts and seek to link near-field flow physics of vortex ring and jet flows with end-applications in mind. Over the past decade, our knowledge on vortex ring and jet flows has grown by leaps and bounds, thanks to increasing use of high-fidelity, high-accuracy experimental techniques and numerical simulations. As such, we now have a much better appreciation and understanding on the initiation and near-field developments of vortex ring and jet flows under many varied initial and boundary conditions. Chapter 1 outlines the vortex ring pinch-off phenomenon and how it relates to the initial stages of jet formations and subsequent jet behaviour, while Chapter 2 takes a closer look at the behaviour resulting from vortex ring impingement upon solid boundaries and how the use of a porous surface alters the impingement process. Chapters 3 and 4 focus upon the formation of synthetic jets from vortex ring structures experimentally and numerically, the challenges in understanding the relationships between their generation parameters and how they can be utilized in flow separation control problems. Chapter 5 looks at the use of imposing selected nozzle trailing-edge modifications to effect changes upon the near-field dynamics associated with circular, noncircular and coaxial jets, with a view to control their mixing behaviour. And last but not least, Chapter 6 details the use of unique impinging jet configurations and how they may lend themselves towards greater understanding and operating efficacies in heat transfer problems. This book will be useful to postgraduate students and researchers alike who wish to get up to speed regarding the latest developments in vortex ring and jet flow behaviour and how their interesting flow dynamics may be put into good use in their intended applications.

Vortex Dynamics

Author : P. G. Saffman
Publisher : Cambridge University Press
ISBN 13 : 9780521477390
Total Pages : 332 pages
Book Rating : 4.4/5 (773 download)

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Book Synopsis Vortex Dynamics by : P. G. Saffman

Download or read book Vortex Dynamics written by P. G. Saffman and published by Cambridge University Press. This book was released on 1995-02-24 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex dynamics is a natural paradigm for the field of chaotic motion and modern dynamical system theory. However, this volume focuses on those aspects of fluid motion that are primarily controlled by the vorticity and are such that the effects of the other fluid properties are secondary.

Paradoxes in Aerohydrodynamics

Author : Shakhbaz A. Yershin
Publisher : Springer
ISBN 13 : 3319256734
Total Pages : 362 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Paradoxes in Aerohydrodynamics by : Shakhbaz A. Yershin

Download or read book Paradoxes in Aerohydrodynamics written by Shakhbaz A. Yershin and published by Springer. This book was released on 2016-09-01 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, on the general topic of hydroaerodynamics, investigates a number of exciting applications in this field, addressing specifically issues that allow seemingly paradoxical issues to be dealt with. The first part is devoted to the study of channel flows, in particular the lateral flow of a viscous and viscous-plastic liquid in a ring channel formed by coaxial cylinders. Specifically, the problem of dissipation of mechanical energy in channel flows of highly viscous liquids is addressed and solved. Furthermore, the mechanism leading to hydrodynamic erosion in intra-field pipelines (known as "channelized effect") is identified. Subsequently, a theory for channel flows with mass transfer through porous walls is developed. In the second part, viscous liquid free flows (jets) are investigated. In particular, a dispersion law for turbulent flow is derived and the existence of dynamic invariance in wake flows of variable density is demonstrated. The third part presents new insights from both theoretical and experimental research into concentrated vortex structure formation and development. The conditions for the existence of Taylor-Goertler vortices are determined and the mechanism for their formation is described. Last but not least, the theory of vortex rings, a particularly interesting problem in hydroaerodynamics, is introduced in the last section of this book. Care has been taken, when selecting original theoretical problems of interest, to make the link with related topics in the published literature. At the same time, all experimental research described in this book is given a meaningful physical interpretation and corroborated by suitable theoretical models and computations.

Theory of Concentrated Vortices

Author : S. V. Alekseenko
Publisher : Springer Science & Business Media
ISBN 13 : 3540733760
Total Pages : 505 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Theory of Concentrated Vortices by : S. V. Alekseenko

Download or read book Theory of Concentrated Vortices written by S. V. Alekseenko and published by Springer Science & Business Media. This book was released on 2007-08-29 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents comprehensive and authoritative coverage of the wide field of concentrated vortices observed in nature and technique. The methods for research of their kinematics and dynamics are considered. Special attention is paid to the flows with helical symmetry. The authors have described models of vortex structures used for interpretation of experimental data which serve as a ground for development of theoretical and numerical approaches to vortex investigation.

Vorticity and Vortex Dynamics

Author : Jie-Zhi Wu
Publisher : Springer Science & Business Media
ISBN 13 : 3540290281
Total Pages : 776 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Vorticity and Vortex Dynamics by : Jie-Zhi Wu

Download or read book Vorticity and Vortex Dynamics written by Jie-Zhi Wu and published by Springer Science & Business Media. This book was released on 2007-04-20 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive and intensive monograph for scientists, engineers and applied mathematicians, as well as graduate students in fluid dynamics. It starts with a brief review of fundamentals of fluid dynamics, with an innovative emphasis on the intrinsic orthogonal decomposition of fluid dynamic process, by which one naturally identifies the content and scope of vorticity and vortex dynamics. This is followed by a detailed presentation of vorticity dynamics as the basis of later development. In vortex dynamics part the book deals with the formation, motion, interaction, stability, and breakdown of various vortices. Typical vortex structures are analyzed in laminar, transitional, and turbulent flows, including stratified and rotational fluids. Physical understanding of vertical flow phenomena and mechanisms is the first priority throughout the book. To make the book self-contained, some mathematical background is briefly presented in the main text, but major prerequisites are systematically given in appendices. Material usually not seen in books on vortex dynamics is included, such as geophysical vortex dynamics, aerodynamic vortical flow diagnostics and management.

Modeling, Control and Coordination of Helicopter Systems

Author : Beibei Ren
Publisher : Springer Science & Business Media
ISBN 13 : 1461415632
Total Pages : 232 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Modeling, Control and Coordination of Helicopter Systems by : Beibei Ren

Download or read book Modeling, Control and Coordination of Helicopter Systems written by Beibei Ren and published by Springer Science & Business Media. This book was released on 2012-02-02 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling, Control and Coordination of Helicopter Systems provides a comprehensive treatment of helicopter systems, ranging from related nonlinear flight dynamic modeling and stability analysis to advanced control design for single helicopter systems, and also covers issues related to the coordination and formation control of multiple helicopter systems to achieve high performance tasks. Ensuring stability in helicopter flight is a challenging problem for nonlinear control design and development. This book is a valuable reference on modeling, control and coordination of helicopter systems,providing readers with practical solutions for the problems that still plague helicopter system design and implementation. Readers will gain a complete picture of helicopters at the systems level, as well as a better understanding of the technical intricacies involved.

Kinematics and Dynamics of Vortex Rings in a Tube

Author : James G. Brasseur
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Kinematics and Dynamics of Vortex Rings in a Tube by : James G. Brasseur

Download or read book Kinematics and Dynamics of Vortex Rings in a Tube written by James G. Brasseur and published by . This book was released on 1979 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

ASME 72-APM-1

Author : Ching Jen Chen
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (818 download)

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Book Synopsis ASME 72-APM-1 by : Ching Jen Chen

Download or read book ASME 72-APM-1 written by Ching Jen Chen and published by . This book was released on 1972 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Tapping the Zero Point Energy

Author : Moray B. King
Publisher : Adventures Unlimited Press
ISBN 13 : 9781931882002
Total Pages : 196 pages
Book Rating : 4.8/5 (82 download)

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Book Synopsis Tapping the Zero Point Energy by : Moray B. King

Download or read book Tapping the Zero Point Energy written by Moray B. King and published by Adventures Unlimited Press. This book was released on 2002 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Free energy and anti-gravity are possible today. The theory of zero point energy shows that there are great fluctuations of electrical field energy embedded within the fabric of space. Some examples: Inventor T Henry Moray produced a fifty-kilowatt free energy machine in 1930; The Pons/Fleischmann cold fusion experiment produced tremendous heat without fusion. The chapters in this remarkable book include: Artificial Gravity; Stepping Down High Frequency Energy; Noise as a Source of Energy; Macroscopic Vacuum Polarisation; Cohering the Zero-Point Energy; The Holistic Paradigm; Electrolytic Fusion - A Zero-Point Energy Coherence?; and, Scalar Currents and Scalar Waves.

The Oxford Handbook of Non-Synoptic Wind Storms

Author : Horia Hangan
Publisher : Oxford University Press
ISBN 13 : 0190670274
Total Pages : 645 pages
Book Rating : 4.1/5 (96 download)

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Book Synopsis The Oxford Handbook of Non-Synoptic Wind Storms by : Horia Hangan

Download or read book The Oxford Handbook of Non-Synoptic Wind Storms written by Horia Hangan and published by Oxford University Press. This book was released on 2021-08-16 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: In different areas of the world, much of the damage due to wind is caused by non-synoptic, local wind storm events, such as tornadoes and downbursts. In North America the damage due to these winds is more than 65% of total wind damage, and there are no guidelines or code implementations to deal with such catastrophic events. As we enter the third decade of the twenty-first century, current research is in its first phase of addressing these types of events, from their characterization, simulation, and loading, to collapse-mode effects on buildings and structures, as well as socioeconomic implications. The need is clear to better understand non-synoptic local winds; properly simulate them; assess the difference in loading between these events and synoptic large-scale winds that have been part of the wind engineering practice for more than five decades; determine their statistics and associated risks; and apply this through guidelines, codes, risk mitigation, and adaptation responses to socioeconomic impact. The Oxford Handbook of Non-Synoptic Wind Storms, led by Dr. Horia Hangan and Dr. Ahsan Kareem, features nearly 30 chapters, contributed by an international panel of leading scientists, scholars, and engineers, that address these issues and stimulate thought, research, and responses to non-synoptic wind storm hazards in North America and worldwide. Together, these articles provide clear definitions of the problems to be tackled, offer a strategic framework for forward-looking research, identify the best-suited tools and methodologies to address the problems at hand, and suggest ways to maximize collaborative planning between the disciplines that will tackle these challenges.

Ions and Electrons in Liquid Helium

Author : A. F. Borghesani
Publisher : Oxford University Press, USA
ISBN 13 : 0199213607
Total Pages : 559 pages
Book Rating : 4.1/5 (992 download)

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Book Synopsis Ions and Electrons in Liquid Helium by : A. F. Borghesani

Download or read book Ions and Electrons in Liquid Helium written by A. F. Borghesani and published by Oxford University Press, USA. This book was released on 2007-05-31 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a comprehensive review of the experiments and theories about the transport properties of charge carriers in liquid helium.

Vortex Atom, The: A New Paradigm

Author : Barry R Clarke
Publisher : World Scientific
ISBN 13 : 9811227608
Total Pages : 302 pages
Book Rating : 4.8/5 (112 download)

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Book Synopsis Vortex Atom, The: A New Paradigm by : Barry R Clarke

Download or read book Vortex Atom, The: A New Paradigm written by Barry R Clarke and published by World Scientific. This book was released on 2021-03-11 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: With clear illustrations throughout and without recourse to quantum mechanics, the reader is invited to revisit unsolved problems lying at the foundations of theoretical physics. Maxwell and his contemporaries abandoned their search for a geometrical representation of the electric and magnetic fields. The wave-particle dilemma and Bose-Einstein statistical counting have resulted in unsatisfactory non-realistic interpretations. Furthermore, a simple structure of the hydrogen atom that includes hyperfine levels is still wanting.Working with the latest experimental data in photonics a proposed solution to the wave-particle dilemma is suggested based on an array of circular-polarized rays. The Bose-Einstein counting procedure is recast in terms of distinguishable elements. Finally, a vortex model of a 'particle' is developed based on a trapped photon. This consists of a single ray revolving around a toroidal surface, and allows a geometrical definition of mass, electric potential, and magnetic momentum. With the adjustment of two parameters, values to 4 dp for the hyperfine frequencies (MHz) of hydrogen can be obtained for which a computer program is available.

Helicopter Flight Dynamics

Author : Gareth D. Padfield
Publisher : John Wiley & Sons
ISBN 13 : 1119401054
Total Pages : 858 pages
Book Rating : 4.1/5 (194 download)

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Book Synopsis Helicopter Flight Dynamics by : Gareth D. Padfield

Download or read book Helicopter Flight Dynamics written by Gareth D. Padfield and published by John Wiley & Sons. This book was released on 2018-11-19 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Book The behaviour of helicopters and tiltrotor aircraft is so complex that understanding the physical mechanisms at work in trim, stability and response, and thus the prediction of Flying Qualities, requires a framework of analytical and numerical modelling and simulation. Good Flying Qualities are vital for ensuring that mission performance is achievable with safety and, in the first and second editions of Helicopter Flight Dynamics, a comprehensive treatment of design criteria was presented, relating to both normal and degraded Flying Qualities. Fully embracing the consequences of Degraded Flying Qualities during the design phase will contribute positively to safety. In this third edition, two new Chapters are included. Chapter 9 takes the reader on a journey from the origins of the story of Flying Qualities, tracing key contributions to the developing maturity and to the current position. Chapter 10 provides a comprehensive treatment of the Flight Dynamics of tiltrotor aircraft; informed by research activities and the limited data on operational aircraft. Many of the unique behavioural characteristics of tiltrotors are revealed for the first time in this book. The accurate prediction and assessment of Flying Qualities draws on the modelling and simulation discipline on the one hand and testing practice on the other. Checking predictions in flight requires clearly defined mission tasks, derived from realistic performance requirements. High fidelity simulations also form the basis for the design of stability and control augmentation systems, essential for conferring Level 1 Flying Qualities. The integrated description of flight dynamic modelling, simulation and flying qualities of rotorcraft forms the subject of this book, which will be of interest to engineers practising and honing their skills in research laboratories, academia and manufacturing industries, test pilots and flight test engineers, and as a reference for graduate and postgraduate students in aerospace engineering.