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Author : Joel Patrick Jenkinson
Publisher :
ISBN 13 :
Total Pages : 594 pages
Book Rating : 4.:/5 (285 download)
Download or read book Dynamics of Turbulent Slugging in Transitional Pipe Flow written by Joel Patrick Jenkinson and published by . This book was released on 1992 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mina Nishi
Publisher : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN 13 : 9783838103181
Total Pages : 132 pages
Book Rating : 4.1/5 (31 download)
Download or read book Laminar to turbulent transition in pipe flow through puffs and slugs written by Mina Nishi and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2009-08 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classical problem in fluid mechanics, laminar to turbulent transition in pipe flow, was investigated. Transition in pipe flow was first studied in detail by Reynolds (1883) and continued subsequently by numerous researchers. Nevertheless, there are still number of unknown issues that need clarification. As is well known, two distinct types of flow structure exist during a laminar to turbulent transition in pipes, namely puffs and slugs, termed by Wygnanski (1973). Investigations described in this dissertation were concentrated in the development of puffs and slugs in a pipe at different Reynolds numbers, following some preliminary research works. Also considered is a transformation from puffs to slugs through puff splittings, occurring while they propagate in a pipe or by an increase in Reynolds number. In low Reynolds number pipe flows, a dissipation of puffs was observed and then investigated. The time between when puffs were created and dissipated was termed `full- lifetime' and measured directly by a pressure transient. According to the investigations, possible evolutions of puffs were found and discussed.
Author : Mark Vladimir Morkovin
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (243 download)
Download or read book Instability, Transition to Turbulence and Predictability written by Mark Vladimir Morkovin and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Akiva M. Yaglom
Publisher : Springer Science & Business Media
ISBN 13 : 9400742371
Total Pages : 611 pages
Book Rating : 4.4/5 (7 download)
Download or read book Hydrodynamic Instability and Transition to Turbulence written by Akiva M. Yaglom and published by Springer Science & Business Media. This book was released on 2012-12-18 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a complete revision of the part of Monin & Yaglom's famous two-volume work "Statistical Fluid Mechanics: Mechanics of Turbulence" that deals with the theory of laminar-flow instability and transition to turbulence. It includes the considerable advances in the subject that have been made in the last 15 years or so. It is intended as a textbook for advanced graduate courses and as a reference for research students and professional research workers. The first two Chapters are an introduction to the mathematics, and the experimental results, for the instability of laminar (or inviscid) flows to infinitesimal (in practice "small") disturbances. The third Chapter develops this linear theory in more detail and describes its application to particular problems. Chapters 4 and 5 deal with instability to finite-amplitude disturbances: much of the material has previously been available only in research papers.
Author : Henry França Meier
Publisher : Springer Nature
ISBN 13 : 3031259904
Total Pages : 213 pages
Book Rating : 4.0/5 (312 download)
Download or read book Advances in Turbulence written by Henry França Meier and published by Springer Nature. This book was released on 2023-05-10 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected papers from the 12th edition of the Spring School of Transition and Turbulence which took place in 2020. The papers cover applications on a number of industrial processes, such as the automotive, aeronautics, chemicals, oil and gas, food, nanotechnology, and others. The readers find out research and applied works on the topics of aerodynamics, computational fluid dynamics, instrumentation and experiments, multi-phase flows, and theoretical and analytical modeling.
Download or read book State Space Properties of Transitional Pipe Flow written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition to turbulence in pipe flow has puzzled scientists since the studies of Hagen, Poiseuille and, most prominently, Osborne Reynolds in the nineteenth century. Much of the difficulty in understanding the transition is connected with the linear stability of the laminar flow, which implies that a fully nonlinear analysis is required. In this work we apply methods from dynamical systems theory and nonlinear dynamics to explore the system's state space close to the transition. We analyze lifetime distributions of turbulent signals in domains of different lengths and study their variation with Reynolds number Re. Lifetimes are found to follow the exponential distribution typical of a chaotic saddle, with a characteristic time that increases rapidly with Re. The absence of a divergence in the lifetimes suggests that turbulence remains transient even at high flow velocities. The coherent states which appear transiently during the turbulent evolution are characterized. Correlation functions for their detection are introduced and their statistical properties extracted. They can be detected during more than 20% of the time. Finally, the stability border between laminar and turbulent dynamics is studied. Using a specially tailored tracking algorithm the dynamics between laminar and turbulent motion can be followed and an invariant dynamical object whose stable manifold separates the laminar from turbulent dynamics is identified. This object should provide useful for further studies on triggering turbulence or relaminarization.
Author : Johan Dubbeldam
Publisher : John Wiley & Sons
ISBN 13 : 3527409319
Total Pages : 261 pages
Book Rating : 4.5/5 (274 download)
Download or read book The Complexity of Dynamical Systems written by Johan Dubbeldam and published by John Wiley & Sons. This book was released on 2011-02-21 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by recognized experts, this edited book covers recent theoretical, experimental and applied issues in the growing fi eld of Complex Systems and Nonlinear Dynamics. It is divided into two parts, with the first section application based, incorporating the theory of bifurcation analysis, numerical computations of instabilities in dynamical systems and discussing experimental developments. The second part covers the broad category of statistical mechanics and dynamical systems. Several novel exciting theoretical and mathematical insights and their consequences are conveyed to the reader.
Author :
Publisher :
ISBN 13 :
Total Pages : 692 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David C. Moxey
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (824 download)
Download or read book Spatio-temporal Dynamics in Pipe Flow written by David C. Moxey and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: When fluid flows through a channel, pipe or duct, there are two basic forms of motion: smooth laminar flow and disordered turbulent motion. The transition between these two states is a fundamental and open problem which has been studied for over 125 years. What has received far less attention are the intermittent dynamics which possess qualities of both turbulent and laminar regimes. The purpose of this thesis is therefore to investigate large-scale intermittent states through extensive numerical simulations in the hopes of further understanding the transition to turbulence in pipe flow. We begin by reviewing the spectral-element code Semtex which is used to perform the simulations. We discuss modifications to this code to impose a constant flowrate to the flow through a pipe and to improve the computational efficiency on certain multicore architectures. We then move on to examine the reverse transition from turbulence to laminar flow in a long, 125 diameter periodic pipe, which unlike the forward transition does not depend on finiteamplitude perturbations to the flow and thus captures the natural dynamics contained within the transition. The Reynolds number Re is reduced from Re = 2,800 to Re = 2,250 over a long timescale, and by investigating the resultant spatio-temporal dynamics we discover that the transition can be characterised by three fundamentally different states separated by two Reynolds numbers. Below Rec
Author :
Publisher :
ISBN 13 :
Total Pages : 620 pages
Book Rating : 4.:/5 (26 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 860 pages
Book Rating : 4.X/5 (4 download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. E. Faber
Publisher : Cambridge University Press
ISBN 13 : 9780521429696
Total Pages : 470 pages
Book Rating : 4.4/5 (296 download)
Download or read book Fluid Dynamics for Physicists written by T. E. Faber and published by Cambridge University Press. This book was released on 1995-08-17 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is over three hundred and fifty years since Torricelli discovered the law obeyed by fountains, yet fluid dynamics remains an active and important branch of physics. This book provides an accessible and comprehensive account of the subject, emphasising throughout the fundamental physical principles, and stressing the connections with other branches of physics. Beginning with a gentle introduction, the book goes on to cover Bernouilli's theorem, compressible flow, potential flow, surface waves, viscosity, vorticity dynamics, thermal convection and instabilities, turbulence, non-Newtonian fluids and the propagation and attenuation of sound in gases. Undergraduate or graduate students in physics or engineering who are taking courses in fluid dynamics will find this book invaluable, but it will also be of great interest to anyone who wants to find out more about this fascinating subject.
Author : Andreas Dillmann
Publisher : Springer Science & Business Media
ISBN 13 : 364235680X
Total Pages : 747 pages
Book Rating : 4.6/5 (423 download)
Download or read book New Results in Numerical and Experimental Fluid Mechanics VIII written by Andreas Dillmann and published by Springer Science & Business Media. This book was released on 2012-12-27 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the contributions to the 17th Symposium of STAB (German Aerospace Aerodynamics Association). STAB includes German scientists and engineers from universities, research establishments and industry doing research and project work in numerical and experimental fluid mechanics and aerodynamics, mainly for aerospace but also for other applications. Many of the contributions collected in this book present results from national and European Community sponsored projects. This volume gives a broad overview of the ongoing work in this field in Germany and spans a wide range of topics: airplane aerodynamics, multidisciplinary optimization and new configurations, hypersonic flows and aerothermodynamics, flow control (drag reduction and laminar flow control), rotorcraft aerodynamics, aeroelasticity and structural dynamics, numerical simulation, experimental simulation and test techniques, aeroacoustics as well as the new fields of biomedical flows, convective flows, aerodynamics and acoustics of high-speed trains.
Author : Philipp Schlatter
Publisher : Springer Science & Business Media
ISBN 13 : 9048137233
Total Pages : 628 pages
Book Rating : 4.0/5 (481 download)
Download or read book Seventh IUTAM Symposium on Laminar-Turbulent Transition written by Philipp Schlatter and published by Springer Science & Business Media. This book was released on 2010-03-11 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origins of turbulent ?ow and the transition from laminar to turbulent ?ow are the most important unsolved problems of ?uid mechanics and aerodynamics. - sides being a fundamental question of ?uid mechanics, there are numerous app- cations relying on information regarding transition location and the details of the subsequent turbulent ?ow. For example, the control of transition to turbulence is - pecially important in (1) skin-friction reduction of energy ef?cient aircraft, (2) the performance of heat exchangers and diffusers, (3) propulsion requirements for - personic aircraft, and (4) separation control. While considerable progress has been made in the science of laminar to turbulent transition over the last 30 years, the c- tinuing increase in computer power as well as new theoretical developments are now revolutionizing the area. It is now starting to be possible to move from simple 1D eigenvalue problems in canonical ?ows to global modes in complex ?ows, all - companied by accurate large-scale direct numerical simulations (DNS). Here, novel experimental techniques such as modern particle image velocimetry (PIV) also have an important role. Theoretically the in?uence of non-normality on the stability and transition is gaining importance, in particular for complex ?ows. At the same time the enigma of transition in the oldest ?ow investigated, Reynolds pipe ?ow tran- tion experiment, is regaining attention. Ideas from dynamical systems together with DNS and experiments are here giving us new insights.
Author : James Mueller Robertson
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Study of Turbulent Flow in Rough Pipes written by James Mueller Robertson and published by . This book was released on 1965 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The considerable literature on turbulent flow past rough surfaces is correlated in terms of modes of presenting the smooth-to-rough transition and the influences of roughness density and shape. Flow measurements in a 3 in. smooth and sand roughened pipe and in an 8 in. steel pipe with 'natural' roughness are reported. The temporal-mean velocity and friction measurements show transitional (between smooth and fully rough behavior) variations. The pipe factor variation is also elucidated; the sand-roughened pipe studies indicate a shift in Nikuradse's presentation. The turbulence - as intensity divided by shear velocity and macroscale in ratio to pipe radius - in rough pipe flow appears the same in rough as in smooth pipe flow. The relative turbulence intensity is constant, or at most decreases slowly with increase in flow Reynolds number. (Author).
Author : P. A. Davidson
Publisher : Oxford University Press
ISBN 13 : 0198869096
Total Pages : 529 pages
Book Rating : 4.1/5 (988 download)
Download or read book Incompressible Fluid Dynamics written by P. A. Davidson and published by Oxford University Press. This book was released on 2022 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incompressible Fluid Dynamics is a textbook for graduate and advanced undergraduate students of engineering, applied mathematics, and geophysics. The text comprises topics that establish the broad conceptual framework of the subject, expose key phenomena, and play an important role in the myriad of applications that exist in both nature and technology. The first half of the book covers topics that include the inviscid equations of Euler and Bernoulli, the Navier-Stokes equation and some of its simpler exact solutions, laminar boundary layers and jets, potential flow theory with its various applications to aerodynamics, the theory of surface gravity waves, and flows with negligible inertia, such as suspensions, lubrication layers, and swimming micro-organisms. The second half is more specialised. Vortex dynamics, which is so essential to many natural phenomena in fluid mechanics, is developed in detail. This is followed by chapters on stratified fluids and flows subject to a strong background rotation, both topics being central to our understanding of atmospheric and oceanic flows. Fluid instabilities and the transition to turbulence are also covered, followed by two chapters on fully developed turbulence. The text is largely self-contained, and aims to combine mathematical precision with a breadth of engineering and geophysical applications. Throughout, physical insight is given priority over mathematical detail.
Author : Mina Nishi
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (436 download)
Download or read book Laminar to Turbulent Transition in Pipe Flow Through Puffs and Slugs written by Mina Nishi and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
