Laminar Turbulent Transition

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IUTAM Laminar-Turbulent Transition

Author : Spencer Sherwin,Peter Schmid,Xuesong Wu
Publisher : Springer
Page : 0 pages
File Size : 40,8 Mb
Release : 2022-08-31
Category : Electronic
ISBN : 3030679047

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IUTAM Laminar-Turbulent Transition by Spencer Sherwin,Peter Schmid,Xuesong Wu Pdf

Invited Papers.- Coherent Structures, Dynamical Systems, Edge States.- Experiments.- Flow Control.- General Stability Analysis.- High Speed and Hypersonics.- Roughness and Receptivity.

Recent Results in Laminar-Turbulent Transition

Author : Siegfried Wagner,Markus Kloker,Ulrich Rist
Publisher : Springer Science & Business Media
Page : 334 pages
File Size : 45,9 Mb
Release : 2013-06-05
Category : Technology & Engineering
ISBN : 9783540450603

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Recent Results in Laminar-Turbulent Transition by Siegfried Wagner,Markus Kloker,Ulrich Rist Pdf

The 24 papers presented at the international concluding colloquium of the German priority programme (DFG-Verbundschwerpunktprogramm) "Transition", held in April 2002 in Stuttgart. The unique and successful programme ran six years, starting April 1996, and was sponsored mainly by the Deutsche Forschungsgemeinschaft, DFG, but also by the Deutsches Zentrum für Luft-und Raumfahrt, DLR, the Physikalisch-Technische Bundesanstalt Braunschweig, PTB, and Airbus Deutschland. The papers summarise the results of the programme and cover transition mechanisms, transition prediction, transition control, natural transition and measurement techniques, transition - turbulence - separation, and visualisation issues. Three invited papers are devoted to mechanisms of turbulence production, to a general framework of stability, receptivity and control, and a forcing model for receptivity analysis. Almost every transition topic arising in subsonic and transonic flow is covered.

Laminar-Turbulent Transition

Author : H.F. Fasel,W.S. Saric
Publisher : Springer Science & Business Media
Page : 703 pages
File Size : 50,7 Mb
Release : 2013-03-09
Category : Science
ISBN : 9783662039977

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Laminar-Turbulent Transition by H.F. Fasel,W.S. Saric Pdf

The origins of turbulent flow and the transition from laminar to turbulent flow are among the most important unsolved problems of fluid mechanics and aerodynamics. Besides being a fundamental question of fluid mechanics, there are any number of applications for information regarding transition location and the details of the subsequent turbulent flow. The JUT AM Symposium on Laminar-Turbulent Transition, co-hosted by Arizona State University and the University of Arizona, was held in Sedona, Arizona. Although four previous JUT AM Symposia bear the same appellation (Stuttgart 1979, Novosibirsk 1984, Toulouse 1989, and Sendai 1994) the topics that were emphasized at each were different and reflect the evolving nature of our understanding of the transition process. The major contributions of Stuttgart 1979 centered on nonlinear behavior and later stages of transition in two-dimensional boundary layers. Stability of closed systems was also included with Taylor vortices in different geometries. The topics of Novosibirsk 1984 shifted to resonant wave interactions and secondary instabilities in boundary layers. Pipe- and channel-flow transition were discussed as model problems for the boundary layer. Investigations of free shear layers were presented and a heavy dose of supersonic papers appeared for the first time. The character of Toulouse 1989 was also different in that 3-D boundary layers, numerical simulations, streamwise vortices, and foundation papers on receptivity were presented. Sendai 1994 saw a number of papers on swept wings and 3-D boundary layers. Numerical simulations attacked a broader range of problems.

Physics of Transitional Shear Flows

Author : Andrey V. Boiko,Alexander V. Dovgal,Genrih R. Grek,Victor V. Kozlov
Publisher : Springer Science & Business Media
Page : 286 pages
File Size : 40,8 Mb
Release : 2011-09-15
Category : Science
ISBN : 9789400724983

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Physics of Transitional Shear Flows by Andrey V. Boiko,Alexander V. Dovgal,Genrih R. Grek,Victor V. Kozlov Pdf

Starting from fundamentals of classical stability theory, an overview is given of the transition phenomena in subsonic, wall-bounded shear flows. At first, the consideration focuses on elementary small-amplitude velocity perturbations of laminar shear layers, i.e. instability waves, in the simplest canonical configurations of a plane channel flow and a flat-plate boundary layer. Then the linear stability problem is expanded to include the effects of pressure gradients, flow curvature, boundary-layer separation, wall compliance, etc. related to applications. Beyond the amplification of instability waves is the non-modal growth of local stationary and non-stationary shear flow perturbations which are discussed as well. The volume continues with the key aspect of the transition process, that is, receptivity of convectively unstable shear layers to external perturbations, summarizing main paths of the excitation of laminar flow disturbances. The remainder of the book addresses the instability phenomena found at late stages of transition. These include secondary instabilities and nonlinear features of boundary-layer perturbations that lead to the final breakdown to turbulence. Thus, the reader is provided with a step-by-step approach that covers the milestones and recent advances in the laminar-turbulent transition. Special aspects of instability and transition are discussed through the book and are intended for research scientists, while the main target of the book is the student in the fundamentals of fluid mechanics. Computational guides, recommended exercises, and PowerPoint multimedia notes based on results of real scientific experiments supplement the monograph. These are especially helpful for the neophyte to obtain a solid foundation in hydrodynamic stability. To access the supplementary material go to extras.springer.com and type in the ISBN for this volume.

Seventh IUTAM Symposium on Laminar-Turbulent Transition

Author : Philipp Schlatter,Dan S. Henningson
Publisher : Springer Science & Business Media
Page : 628 pages
File Size : 51,7 Mb
Release : 2010-03-11
Category : Science
ISBN : 9789048137237

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Seventh IUTAM Symposium on Laminar-Turbulent Transition by Philipp Schlatter,Dan S. Henningson Pdf

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.

A Visual Study of the Flow Model in the Later Stages of Laminar-turbulent Transition on a Flat Plate

Author : C. A. Meyer,Stephen Jay Kline
Publisher : Unknown
Page : 106 pages
File Size : 50,7 Mb
Release : 1961
Category : Laminar flow
ISBN : UOM:39015104979425

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A Visual Study of the Flow Model in the Later Stages of Laminar-turbulent Transition on a Flat Plate by C. A. Meyer,Stephen Jay Kline Pdf

A number of aspects of transition from laminar to turbulent flow were investigated on a flat plate with free stream water velocities between .75 feet per second and 1.2 feet per second. The study was primarily visual, using dye techniques, although some measurements were made using a hot film anemometer. Also investigated were the later stages of natural transition. Dye patterns associated with the chain of events leading from laminar to turbulent flow in natural transition were analyzed. (Author).

Elements of Transitional Boundary-Layer Flowlements

Author : Robert Edward Mayle
Publisher : Logos Verlag Berlin GmbH
Page : 415 pages
File Size : 55,5 Mb
Release : 2018-09-15
Category : Science
ISBN : 9783832545987

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Elements of Transitional Boundary-Layer Flowlements by Robert Edward Mayle Pdf

Second Enhanced Edition Suitable for advanced-level courses or an independent study in fluid mechanics, this text by an expert in the field provides the basic aspects of laminar-to-turbulent flow transition in boundary layers. Logically organized into three major parts, the book covers pre- and post-transitional flow, transitional flow, and several advanced topics in periodically disturbed transitional flow. Some of the subjects covered within the book include high-frequency unsteady laminar flow, turbulent flow, natural transition, bypass transition, turbulent spot theory, turbulent spot kinematics and production, correlations for the onset and rate of transition, global and conditional averaging, transitional flow models, wakeinduced transition, multimode transition, and separated-flow transition. Containing some 202 figures (all drawn by the author), 28 tables, 12 appendices, a supplement on tensors, and an extensive bibliography, the 415 page book provides a wealth of data and information about the subject.

Laminar-Turbulent Transition

Author : D. Arnal,R. Michel
Publisher : Springer Science & Business Media
Page : 706 pages
File Size : 42,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642841033

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Laminar-Turbulent Transition by D. Arnal,R. Michel Pdf

The subject of laminar-turbulent transition is of considerable practical importance and has a wide range of engineering applications. For this reason, the International Union of Applied Mechanics decided to sponsor a third Symposium on "Laminar-Turbulent Transition", which would be organised by the ONERA Toulouse Research Center and held at "Ecole Nationale Superieure de l'Aeronautique et de l'Espace" in 1989. It was supposed that like the two previous IUTAM Symposia (Stuttgart 1979 and Novosibirsk 1984) the symposium would be devoted to experimental of laminar-turbulent transition In fluids, i.e. the and theoretical studies physical problem of transition and mathematical modelling in shear flows. The contributed papers were selected by the Scientific Committee from extended abstracts. The larger number of highly qualified papers submitted for presentation led us to include in the program poster sessions, which could be held during morning, lunch and afternoon breaks, and to take the decision that the symposium should last five days (from Monday 11 to Friday 15 September). An excursion on Wednesday offering a well deserved rest and the occasion of new personal exchanges between the participants seems to have been appreciated by all. The symposium consisted of 8 invited lectures and 62 contributed pa pers presented either on oral or poster sessions.

Seventh IUTAM Symposium on Laminar-Turbulent Transition

Author : Philipp Schlatter,Dan S. Henningson
Publisher : Springer
Page : 608 pages
File Size : 54,6 Mb
Release : 2011-11-29
Category : Science
ISBN : 9048137322

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Seventh IUTAM Symposium on Laminar-Turbulent Transition by Philipp Schlatter,Dan S. Henningson Pdf

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.

Laminar-Turbulent Transition

Author : Ryoji Kobayashi
Publisher : Springer Science & Business Media
Page : 541 pages
File Size : 44,9 Mb
Release : 2013-03-12
Category : Technology & Engineering
ISBN : 9783642797651

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Laminar-Turbulent Transition by Ryoji Kobayashi Pdf

The International Union of Theoretical and Applied Mechanics (IUTAM) decided in 1992 to sponsor the fourth Symposium on Laminar-Turbulent Transition, Sendai/Japan, 1994. The objectives of the present Symposium were to deepen the fundamental knowledge of stability and laminar turbulent transition in three-dimensional and compressible flows and to contribute to recent developing technologies in the field. This Symposium followed the three previous IUTAM-Symposia (Stuttgart 1979, Novosibirsk 1984 and Toulouse 1989). The Scientific Committee selected two keynote lectures and 62 technical papers. The Symposium was held on the 5th to 9th of September, 1994, at the Sendai International Center in Sendai. The participants were 82 scientists from 10 countries. The keynote lectures have critically reviewed recent development of researches concerning the laminar-to-turbulent transition phenomena from the fundamental and the application aspects. Many papers presented were concerned about the detailed mechanism of the boundary layer transition (receptivity, secondary instability, turbulent spot and bypass transition). Particular emphasis was further placed on the transition of three-dimensional boundary layers on rotation systems and on swept wings. Attention was also given to compressible hypersonic flows.

Laminar-Turbulent Transition

Author : Victor V. Kozlov
Publisher : Springer Science & Business Media
Page : 770 pages
File Size : 55,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642824623

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Laminar-Turbulent Transition by Victor V. Kozlov Pdf

At the suggestion of the USSR National Committee of Theo retical and Applied Mechanios the International Union of Theo retical and Applied Meohanics made a deoision to organize the Second IUTAM Symposium on Laminar-Turbulent Transition in No vosibirsk. Professor Yanenko was entrusted to be the chairman of the scientific committee. It was proposed that about 100 scientists would participate in the Symposium and that 60 lectures and invited lectures would be delivered; as for the theme of the Symposium, it was devoted to experimental and theoretical stu dies of laminar-turbulent transition in fluids and gases, i.e. the physical problems of transition and mathematical modeling in shear flows. It was planned to lay a special emphasis on fundamental mechanisms of the transition process. The scienti fio committee approved of the scope of the Symposium having considered the changes in the directions of the stUdies which took place since the First Symposium. For example, there was singled out the problem of transformation of external distur bances into eigenoscillations of shear flows, i.e. the recep tivity problem which was only slightly touched upon at the First Symposium. A new section appeared devoted to the inter relation of the flow separation phenomenon and its stability. It was planned to focus the attention on the secondary instability at transition to turbulence at the non-linear stage of the flow breakdown as well as on the loss of stability and the disturbances development in 3-D flows.

The Origin of Turbulence in Near-Wall Flows

Author : A.V. Boiko,Genrih R. Grek,A.V. Dovgal,Victor V. Kozlov
Publisher : Springer Science & Business Media
Page : 273 pages
File Size : 49,9 Mb
Release : 2013-03-09
Category : Technology & Engineering
ISBN : 9783662047651

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The Origin of Turbulence in Near-Wall Flows by A.V. Boiko,Genrih R. Grek,A.V. Dovgal,Victor V. Kozlov Pdf

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.

IUTAM Laminar-Turbulent Transition

Author : Spencer Sherwin,Peter Schmid,Xuesong Wu
Publisher : Springer Nature
Page : 809 pages
File Size : 49,7 Mb
Release : 2021-07-30
Category : Computers
ISBN : 9783030679026

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IUTAM Laminar-Turbulent Transition by Spencer Sherwin,Peter Schmid,Xuesong Wu Pdf

This volume comprises the carefully revised papers of the 9th IUTAM Symposium on Laminar-Turbulent Transition, held at the Imperial College, London, UK, in September 2019. The papers focus on the leading research in understanding transition to turbulence, which is a challenging topic of fluid mechanics and arises in many modern technologies as well as in nature. The proceedings are of interest for researchers in fluid mechanics and industry who have to handle these types of problems, such as in the aeronautical sector.

Laminar-turbulent Transition

Author : Anonim
Publisher : Unknown
Page : 432 pages
File Size : 52,9 Mb
Release : 1980
Category : Boundary layer
ISBN : 038710142X

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Laminar-turbulent Transition by Anonim Pdf

IUTAM Symposium on Laminar-Turbulent Transition and Finite Amplitude Solutions

Author : Tom Mullin,R. R. Kerswell
Publisher : Springer Science & Business Media
Page : 335 pages
File Size : 48,9 Mb
Release : 2005-12-28
Category : Technology & Engineering
ISBN : 9781402040498

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IUTAM Symposium on Laminar-Turbulent Transition and Finite Amplitude Solutions by Tom Mullin,R. R. Kerswell Pdf

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.