Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
On Slugs And Puffs In Transitional Pipe Flow
Download On Slugs And Puffs In Transitional Pipe Flow full books in PDF, epub, and Kindle. Read online On Slugs And Puffs In Transitional Pipe Flow ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis On Slugs and Puffs in Transitional Pipe Flow by : I. J. Wygnanski
Download or read book On Slugs and Puffs in Transitional Pipe Flow written by I. J. Wygnanski and published by . This book was released on 1972 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The pipe was smooth and carefully aligned so that turbulent slugs appeared naturally at a Reynolds number greater than 50,000. Transition could be initiated at lower Reynolds numbers by introducing disturbances into the inlet. For slightly disturbed inlet, turbulent slugs were observed which occupied the entire cross section of the pipe, growing in length as they proceed downstream. When a large distrubance was introduced into the inlet, the turbulent regions which were convected downstream were designated as puffs. Results of the study are discussed.
Book Synopsis Laminar to turbulent transition in pipe flow through puffs and slugs by : Mina Nishi
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.
Book Synopsis Laminar to Turbulent Transition in Pipe Flow Through Puffs and Slugs by : Mina Nishi
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:
Book Synopsis Intermittency in Transitional Shear Flows by : Yohann Duguet
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.
Book Synopsis New Results in Numerical and Experimental Fluid Mechanics VIII by : Andreas Dillmann
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.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Shedding Rates of Slugs in Two Phase Horizontal Pipe Flow by : Bennett David Woods
Download or read book Shedding Rates of Slugs in Two Phase Horizontal Pipe Flow written by Bennett David Woods and published by . This book was released on 1995 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Complexity of Dynamical Systems by : Johan Dubbeldam
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.
Book Synopsis Direct Numerical Simulation of Incompressible Pipe Flow Using a B-spline Spectral Method by : Patrick Loulou
Download or read book Direct Numerical Simulation of Incompressible Pipe Flow Using a B-spline Spectral Method written by Patrick Loulou and published by . This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seventh IUTAM Symposium on Laminar-Turbulent Transition by : Philipp Schlatter
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.
Book Synopsis On Transition in a Pipe. Part II. The Equilibrium Puff by : I. Wyganski
Download or read book On Transition in a Pipe. Part II. The Equilibrium Puff written by I. Wyganski and published by . This book was released on 1974 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conditionally sampled hot wire measurements were taken in a pipe at low Reynolds numbers between 2700 and 2000 corresponding to the onset of turbulence as a result of a large perturbation in the flow. This type of transition gives rise to a turbulent puff which maintains itself indefinitely around Re=2200. The structure of the puff was investigated in some detail and was found to be very different from the structure of the fully developed turbulent pipe flow, nevertheless it is independent of the character to the disturbance which created it. The purpose of the study was to gain some insight into the mechanism of transition in a pipe. (Author).
Book Synopsis Advances in Turbulence XII by : Bruno Eckhardt
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.
Book Synopsis Turbulence and Navier Stokes Equations by : R. Temam
Download or read book Turbulence and Navier Stokes Equations written by R. Temam and published by Springer. This book was released on 2006-11-14 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Numerical Simulation of Transition to Turbulence and Turbulence Control in Pipe Flow by : Baofang Song
Download or read book Direct Numerical Simulation of Transition to Turbulence and Turbulence Control in Pipe Flow written by Baofang Song and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this thesis is the transition to turbulence and turbulence control in pipe flow. In pipes turbulence arises despite the linear stability of the laminar flow (subcritical transition) and directly from onset the flow is spatio-temporally complex. Given sufficiently strong perturbations, turbulence appears in localized patches (puffs) at low Reynolds numbers. At high Reynolds number, patches aggressively grow (slugs) and eventually render the flow fully turbulent. The questions of when and how turbulence starts to grow have long challenged scientists and will be discussed in-dep ...
Book Synopsis The Origin of Turbulence in Near-Wall Flows by : A.V. Boiko
Download or read book The Origin of Turbulence in Near-Wall Flows written by A.V. Boiko and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Origin of Species Charles Darwin The origin of turbulence in fluids is a long-standing problem and has been the focus of research for decades due to its great importance in a variety of engineering applications. Furthermore, the study of the origin of turbulence is part of the fundamental physical problem of turbulence description and the philosophical problem of determinism and chaos. At the end of the nineteenth century, Reynolds and Rayleigh conjectured that the reason of the transition of laminar flow to the 'sinuous' state is in stability which results in amplification of wavy disturbances and breakdown of the laminar regime. Heisenberg (1924) was the founder of linear hydrody namic stability theory. The first calculations of boundary layer stability were fulfilled in pioneer works of Tollmien (1929) and Schlichting (1932, 1933). Later Taylor (1936) hypothesized that the transition to turbulence is initi ated by free-stream oscillations inducing local separations near wall. Up to the 1940s, skepticism of the stability theory predominated, in particular due to the experimental results of Dryden (1934, 1936). Only the experiments of Schubauer and Skramstad (1948) revealed the determining role of insta bility waves in the transition. Now it is well established that the transition to turbulence in shear flows at small and moderate levels of environmental disturbances occurs through development of instability waves in the initial laminar flow. In Chapter 1 we start with the fundamentals of stability theory, employing results of the early studies and recent advances.
Book Synopsis Dynamics of Turbulent Slugging in Transitional Pipe Flow by : Joel Patrick Jenkinson
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:
Book Synopsis Advances in Turbulence VI by : S. Gavrilakis
Download or read book Advances in Turbulence VI written by S. Gavrilakis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Turbulence VI presents an update on the state of turbulence research with some bias towards research in Europe, since it represents an almost complete collection of the paper presentations at the Sixth European Turbulence Conference, sponsored by EUROMECH, ERCOFTAC and COST, and held at the Swiss Federal Institute of Technology in Lausanne, July 2-5, 1996. The problem of transition, together with the structural description of turbulence, and the scaling laws of fully developed turbulence have continued to receive most attention by the research community and much progress has been made since the last European Turbulence Conference in 1994. The volume is thus geared towards specialists in the area of flow turbulence who could not attend the conference, as well as anybody who wishes quickly to assess the most active current research areas and the groups associated with them.
