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Author : Tobias M. Schneider
Publisher :
ISBN 13 : 9783940333551
Total Pages : 138 pages
Book Rating : 4.3/5 (335 download)
Download or read book State Space Properties of Transitional Pipe Flow written by Tobias M. Schneider and published by . This book was released on 2007 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 :
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ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yohann Duguet
Publisher : MDPI
ISBN 13 : 3036509429
Total Pages : 180 pages
Book Rating : 4.0/5 (365 download)
Download or read book Intermittency in Transitional Shear Flows written by Yohann Duguet and published by MDPI. This book was released on 2021-08-31 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains original peer-reviewed articles written by some of the most prominent international physicists active in the field of hydrodynamics. The topic is entirely devoted to the study of the transitional regimes of incompressible viscous flow found at the onset of turbulent flows. Nine articles written for this 2020 Special Issue of the journal Entropy (MDPI) have been gathered at the crossroads of fluid mechanics, statistical physics, complexity theory, and applied mathematics. They include experimental, analytic, and computational material of an academic level that has not been published anywhere else.
Author : Tom Mullin
Publisher : Springer Science & Business Media
ISBN 13 : 1402040490
Total Pages : 335 pages
Book Rating : 4.4/5 (2 download)
Download or read book IUTAM Symposium on Laminar-Turbulent Transition and Finite Amplitude Solutions written by Tom Mullin and published by Springer Science & Business Media. This book was released on 2005-12-28 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciting new direction in hydrodynamic stability theory and the transition to turbulence is concerned with the role of disconnected states or finite amplitude solutions in the evolution of disorder in fluid flows. This volume contains refereed papers presented at the IUTAM/LMS sponsored symposium on "Non-Uniqueness of Solutions to the Navier-Stokes equations and their Connection with Laminar-Turbulent Transition" held in Bristol 2004. Theoreticians and experimentalists gathered to discuss developments in understanding both the onset and collapse of disordered motion in shear flows such as those found in pipes and channels. The central objective of the symposium was to discuss the increasing amount of experimental and numerical evidence for finite amplitude solutions to the Navier-Stokes equations and to set the work into a modern theoretical context. The participants included many of the leading authorities in the subject and this volume captures much of the flavour of the resulting stimulating and lively discussions.
Author : Wolfgang Kollmann
Publisher : Springer Nature
ISBN 13 : 3031595785
Total Pages : 848 pages
Book Rating : 4.0/5 (315 download)
Download or read book Navier-Stokes Turbulence written by Wolfgang Kollmann and published by Springer Nature. This book was released on 2024 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated/augmented second edition retains it class-tested content and pedagogy as a core text for graduate courses in advanced fluid mechanics and applied science. The new edition adds revised sections, clarification, problems, and chapter extensions including a rewritten section on Schauder bases for turbulent pipe flow, coverage of Cantwell’s mixing length closure for turbulent pipe flow, and a section on the variational Hessian. Consisting of two parts, the first provides an introduction and general theory of fully developed turbulence, where treatment of turbulence is based on the linear functional equation derived by E. Hopf governing the characteristic functional that determines the statistical properties of a turbulent flow. In this section, Professor Kollmann explains how the theory is built on divergence free Schauder bases for the phase space of the turbulent flow and the space of argument vector fields for the characteristic functional. The second segment, presented over subsequent chapters, is devoted to mapping methods, homogeneous turbulence based upon the hypotheses of Kolmogorov and Onsager, intermittency, structural features of turbulent shear flows and their recognition. Adds section on Plancherel’s theorem and a detailed problem on analytic solution of functional differential equations; Extends chapter nine on characteristic functionals to greater explain the role of convection; Reinforces concepts with problems on the theory and particular examples of turbulent flows such as periodic pipe flow. . .
Author : Pijush K. Kundu
Publisher : Academic Press
ISBN 13 : 9780123814005
Total Pages : 904 pages
Book Rating : 4.8/5 (14 download)
Download or read book Fluid Mechanics written by Pijush K. Kundu and published by Academic Press. This book was released on 2010-01-20 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid mechanics, the study of how fluids behave and interact under various forces and in various applied situations—whether in the liquid or gaseous state or both—is introduced and comprehensively covered in this widely adopted text. Fluid Mechanics, Fourth Edition is the leading advanced general text on fluid mechanics. Changes for the 4th edition from the 3rd edition: Updates to several chapters and sections, including Boundary Layers, Turbulence, Geophysical Fluid Dynamics, Thermodynamics and Compressibility Fully revised and updated chapter on computational fluid dynamics New chapter on Biofluid Mechanics by Professor Portonovo Ayyaswamy, the Asa Whitney Professor of Dynamical Engineering at the University of Pennsylvania
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Publisher :
ISBN 13 :
Total Pages : 1104 pages
Book Rating : 4.:/5 (31 download)
Download or read book Nonlinearity written by and published by . This book was released on 2008 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter J. Schmid
Publisher : Springer Science & Business Media
ISBN 13 : 1461301858
Total Pages : 561 pages
Book Rating : 4.4/5 (613 download)
Download or read book Stability and Transition in Shear Flows written by Peter J. Schmid and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed look at some of the more modern issues of hydrodynamic stability, including transient growth, eigenvalue spectra, secondary instability. It presents analytical results and numerical simulations, linear and selected nonlinear stability methods. By including classical results as well as recent developments in the field of hydrodynamic stability and transition, the book can be used as a textbook for an introductory, graduate-level course in stability theory or for a special-topics fluids course. It is equally of value as a reference for researchers in the field of hydrodynamic stability theory or with an interest in recent developments in fluid dynamics. Stability theory has seen a rapid development over the past decade, this book includes such new developments as direct numerical simulations of transition to turbulence and linear analysis based on the initial-value problem.
Author : Frits W. Vaandrager
Publisher : Springer
ISBN 13 : 3540489835
Total Pages : 282 pages
Book Rating : 4.5/5 (44 download)
Download or read book Hybrid Systems: Computation and Control written by Frits W. Vaandrager and published by Springer. This book was released on 2003-05-21 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the Second International Workshop on Hybrid Systems: Computation and Control (HSCC’99) to be held March 29- 31, 1999, in the village Berg en Dal near Nijmegen, The Netherlands. The rst workshop of this series was held in April 1998 at the University of California at Berkeley. The series follows meetings that were initiated by Anil Nerode at Cornell University. The proceedings of those meetings were published in the Springer-Verlag LNCS Series, Volumes 736, 999, 1066, 1201, and 1273. The p- ceedings of the rst workshop of the new series was published in LNCS 1386. The focus of the workshop is on modeling, control, synthesis, design, and ve- cation of hybrid systems. A hybrid system is a theoretical model for a computer controlled engineering system, with a dynamics that evolves both in a discrete state set and in a family of continuous state spaces. Research is motivated by, for example, control of electro-mechanical systems (robots), air tra c control, control of automated freeways, and chemical process control. The emerging - search area of hybrid systems overlaps both with computer science and with control theory. The interaction between researchers from these elds is expected to be fruitfull for the development of the area of hybrid systems.
Author : Bruno Eckhardt
Publisher : Springer Science & Business Media
ISBN 13 : 3642030858
Total Pages : 973 pages
Book Rating : 4.6/5 (42 download)
Download or read book Advances in Turbulence XII written by Bruno Eckhardt and published by Springer Science & Business Media. This book was released on 2010-03-17 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises the communications presented at the EUROMECH European Turbulence Conference ETC12, held in Marburg in September 2009. The topics covered by the meeting include: Acoustics of turbulent flows, Atmospheric turbulence, Control of turbulent flows, Geophysical and astrophysical turbulence, Instability and transition, Intermittency and scaling, Large eddy simulation and related techniques, Lagrangian aspects, MHD turbulence, Reacting and compressible turbulence, Transport and mixing, Turbulence in multiphase and non-Newtonian flows, Vortex dynamics and structure, formation, Wall bounded flows.
Author :
Publisher :
ISBN 13 :
Total Pages : 476 pages
Book Rating : 4.F/5 ( download)
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.3/5 (91 download)
Download or read book Hydraulic Research in the United States 1968 written by United States. National Bureau of Standards and published by . This book was released on 1969 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 470 pages
Book Rating : 4.3/5 (243 download)
Download or read book Publications of the National Bureau of Standards ... Catalog written by United States. National Bureau of Standards and published by . This book was released on 1983 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.0/5 ( download)
Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1972 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.0/5 ( download)
Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1968 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
