Recent Results In Laminar Turbulent Transition

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Recent Results in Laminar-Turbulent Transition

Siegfried Wagner,Markus Kloker,Ulrich Rist
Recent Results in Laminar Turbulent Transition Book PDF

Author : Siegfried Wagner,Markus Kloker,Ulrich Rist
Publisher : Springer Science & Business Media
Page : 334 pages
File Size : 42,7 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

H.F. Fasel,W.S. Saric
Laminar Turbulent Transition Book PDF

Author : H.F. Fasel,W.S. Saric
Publisher : Springer Science & Business Media
Page : 703 pages
File Size : 55,8 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.

The Origin of Turbulence in Near-Wall Flows

A.V. Boiko,Genrih R. Grek,A.V. Dovgal,Victor V. Kozlov
The Origin of Turbulence in Near Wall Flows Book PDF

Author : A.V. Boiko,Genrih R. Grek,A.V. Dovgal,Victor V. Kozlov
Publisher : Springer Science & Business Media
Page : 273 pages
File Size : 45,8 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.

New Results in Numerical and Experimental Fluid Mechanics VI

Cameron Tropea
New Results in Numerical and Experimental Fluid Mechanics VI Book PDF

Author : Cameron Tropea
Publisher : Springer Science & Business Media
Page : 973 pages
File Size : 48,7 Mb
Release : 2007-10-26
Category : Computers
ISBN : 9783540744580

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New Results in Numerical and Experimental Fluid Mechanics VI by Cameron Tropea Pdf

This volume features the contributions to the 15th Symposium of the STAB (German Aerospace Aerodynamics Association). Papers provide a broad overview of ongoing work in Germany, including high aspect ratio wings, low aspect ratio wings, bluff bodies, laminar flow control and transition, active flow control, hypersonic flows, aeroelasticity, aeroacoustics, mathematical fundamentals, numerical simulations, physical fundamentals, and facilities.

Laminar-Turbulent Transition

D. Arnal,R. Michel
Laminar Turbulent Transition Book PDF

Author : D. Arnal,R. Michel
Publisher : Springer Science & Business Media
Page : 706 pages
File Size : 40,6 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.

IUTAM Symposium on Laminar-Turbulent Transition and Finite Amplitude Solutions

Tom Mullin,R. R. Kerswell
IUTAM Symposium on Laminar Turbulent Transition and Finite Amplitude Solutions Book PDF

Author : Tom Mullin,R. R. Kerswell
Publisher : Springer Science & Business Media
Page : 335 pages
File Size : 42,5 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.

Physics of Transitional Shear Flows

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

Author : Andrey V. Boiko,Alexander V. Dovgal,Genrih R. Grek,Victor V. Kozlov
Publisher : Springer Science & Business Media
Page : 286 pages
File Size : 46,8 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.

Three-Dimensional Attached Viscous Flow

Ernst Heinrich Hirschel,Jean Cousteix,Wilhelm Kordulla
Three Dimensional Attached Viscous Flow Book PDF

Author : Ernst Heinrich Hirschel,Jean Cousteix,Wilhelm Kordulla
Publisher : Springer Science & Business Media
Page : 396 pages
File Size : 54,8 Mb
Release : 2013-10-29
Category : Technology & Engineering
ISBN : 9783642413780

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Three-Dimensional Attached Viscous Flow by Ernst Heinrich Hirschel,Jean Cousteix,Wilhelm Kordulla Pdf

Viscous flow is treated usually in the frame of boundary-layer theory and as two-dimensional flow. Books on boundary layers give at most the describing equations for three-dimensional boundary layers, and solutions often only for some special cases. This book provides basic principles and theoretical foundations regarding three-dimensional attached viscous flow. Emphasis is put on general three-dimensional attached viscous flows and not on three-dimensional boundary layers. This wider scope is necessary in view of the theoretical and practical problems to be mastered in practice. The topics are weak, strong, and global interaction, the locality principle, properties of three-dimensional viscous flow, thermal surface effects, characteristic properties, wall compatibility conditions, connections between inviscid and viscous flow, flow topology, quasi-one- and two-dimensional flows, laminar-turbulent transition and turbulence. Though the primary flight speed range is that of civil air transport vehicles, flows past other flying vehicles up to hypersonic speeds are also considered. Emphasis is put on general three-dimensional attached viscous flows and not on three-dimensional boundary layers, as this wider scope is necessary in view of the theoretical and practical problems that have to be overcome in practice. The specific topics covered include weak, strong, and global interaction; the locality principle; properties of three-dimensional viscous flows; thermal surface effects; characteristic properties; wall compatibility conditions; connections between inviscid and viscous flows; flow topology; quasi-one- and two-dimensional flows; laminar-turbulent transition; and turbulence. Detailed discussions of examples illustrate these topics and the relevant phenomena encountered in three-dimensional viscous flows. The full governing equations, reference-temperature relations for qualitative considerations and estimations of flow properties, and coordinates for fuselages and wings are also provided. Sample problems with solutions allow readers to test their understanding.

Turbulence and Interactions

Michel Deville,Thien-Hiep Lê,Pierre Sagaut
Turbulence and Interactions Book PDF

Author : Michel Deville,Thien-Hiep Lê,Pierre Sagaut
Publisher : Springer Science & Business Media
Page : 402 pages
File Size : 55,9 Mb
Release : 2010-09-28
Category : Technology & Engineering
ISBN : 9783642141393

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Turbulence and Interactions by Michel Deville,Thien-Hiep Lê,Pierre Sagaut Pdf

This volume contains six keynote lectures and 44 contributed papers of the TI 2009 conference that was held in Saint-Luce, La Martinique, May 31-June 5, 2009. These lectures address the latest developments in direct numerical simulations, large eddy simulations, compressible turbulence, coherent structures, droplets, two-phase flows, etc. The present monograph is a snapshot of the state-of-the-art in the field of turbulence with a broad view on theory, experiments and numerical simulations.

Sixth IUTAM Symposium on Laminar-Turbulent Transition

Rama Govindarajan
Sixth IUTAM Symposium on Laminar Turbulent Transition Book PDF

Author : Rama Govindarajan
Publisher : Springer Science & Business Media
Page : 458 pages
File Size : 50,8 Mb
Release : 2006-01-18
Category : Technology & Engineering
ISBN : 9781402041594

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Sixth IUTAM Symposium on Laminar-Turbulent Transition by Rama Govindarajan Pdf

The dynamics of transition from laminar to turbulent flow remains to this day a major challenge in theoretical and applied mechanics. A series of IUTAM symposia held over the last twenty five years at well-known Centres of research in the subject - Novosibirsk, Stuttgart, Toulouse, Sendai and Sedona (Arizona) - has proved to be a great catalyst which has given a boost to research and our understanding of the field. At this point of time, the field is changing significantly with several emerging directions. The sixth IUTAM meeting in the series, which was held at the Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India, focused on the progress after the fifth meeting held at Sedona in 1999. The s- posium, which adhered to the IUTAM format of a single session, included seven invited lectures, fifty oral presentations and eight posters. During the course of the symposium, the following became evident. The area of laminar-turbulent transition has progressed considerably since 1999. Better theoretical tools, for handling nonlinearities as well as transient behaviour are now available. This is accompanied by an en- mous increase in the level of sophistication of both experiments and direct numerical simulations. The result has been that our understanding of the early stages of the transition process is now on much firmer footing and we are now able to study many aspects of the later stages of the transition process.

IUTAM Laminar-Turbulent Transition

Spencer Sherwin,Peter Schmid,Xuesong Wu
IUTAM Laminar Turbulent Transition Book PDF

Author : Spencer Sherwin,Peter Schmid,Xuesong Wu
Publisher : Springer Nature
Page : 809 pages
File Size : 54,5 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.

Basics of Aerothermodynamics

Ernst Heinrich Hirschel
Basics of Aerothermodynamics Book PDF

Author : Ernst Heinrich Hirschel
Publisher : Springer Science & Business Media
Page : 419 pages
File Size : 41,8 Mb
Release : 2006-01-16
Category : Technology & Engineering
ISBN : 9783540265191

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Basics of Aerothermodynamics by Ernst Heinrich Hirschel Pdf

The last two decades have brought two important developments for aeroth- modynamics. One is that airbreathing hypersonic flight became the topic of technology programmes and extended system studies. The other is the emergence and maturing of the discrete numerical methods of aerodyn- ics/aerothermodynamics complementary to the ground-simulation facilities, with the parallel enormous growth of computer power. Airbreathing hypersonic flight vehicles are, in contrast to aeroassisted re-entry vehicles, drag sensitive. They have, further, highly integrated lift and propulsion systems. This means that viscous eflFects, like boundary-layer development, laminar-turbulent transition, to a certain degree also strong interaction phenomena, are much more important for such vehicles than for re-entry vehicles. This holds also for the thermal state of the surface and thermal surface effects, concerning viscous and thermo-chemical phenomena (more important for re-entry vehicles) at and near the wall. The discrete numerical methods of aerodynamics/aerothermodynamics permit now - what was twenty years ago not imaginable - the simulation of high speed flows past real flight vehicle configurations with thermo-chemical and viscous effects, the description of the latter being still handicapped by in sufficient flow-physics models. The benefits of numerical simulation for flight vehicle design are enormous: much improved aerodynamic shape definition and optimization, provision of accurate and reliable aerodynamic data, and highly accurate determination of thermal and mechanical loads. Truly mul- disciplinary design and optimization methods regarding the layout of thermal protection systems, all kinds of aero-servoelasticity problems of the airframe, et cetera, begin now to emerge.

High Performance Computing in Science and Engineering, Garching/Munich 2007

Siegfried Wagner,Matthias Steinmetz,Arndt Bode,Matthias Brehm
High Performance Computing in Science and Engineering Garching Munich 2007 Book PDF

Author : Siegfried Wagner,Matthias Steinmetz,Arndt Bode,Matthias Brehm
Publisher : Springer Science & Business Media
Page : 700 pages
File Size : 49,8 Mb
Release : 2008-10-22
Category : Mathematics
ISBN : 9783540691822

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High Performance Computing in Science and Engineering, Garching/Munich 2007 by Siegfried Wagner,Matthias Steinmetz,Arndt Bode,Matthias Brehm Pdf

For the fourth time, the Leibniz Supercomputing Centre (LRZ) and the Com- tence Network for Technical, Scienti c High Performance Computing in Bavaria (KONWIHR) publishes the results from scienti c projects conducted on the c- puter systems HLRB I and II (High Performance Computer in Bavaria). This book reports the research carried out on the HLRB systems within the last three years and compiles the proceedings of the Third Joint HLRB and KONWIHR Result and Reviewing Workshop (3rd and 4th December 2007) in Garching. In 2000, HLRB I was the rst system in Europe that was capable of performing more than one Tera op/s or one billion oating point operations per second. In 2006 it was replaced by HLRB II. After a substantial upgrade it now achieves a peak performance of more than 62 Tera op/s. To install and operate this powerful system, LRZ had to move to its new facilities in Garching. However, the situation regarding the need for more computation cycles has not changed much since 2000. The demand for higher performance is still present, a trend that is likely to continue for the foreseeable future. Other resources like memory and disk space are currently in suf cient abundance on this new system.

The Origin of Turbulence in Near-Wall Flows

A.V. Boiko
The Origin of Turbulence in Near Wall Flows Book PDF

Author : A.V. Boiko
Publisher : Springer Science & Business Media
Page : 286 pages
File Size : 55,5 Mb
Release : 2002-01-22
Category : Science
ISBN : 3540421815

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The Origin of Turbulence in Near-Wall Flows by A.V. Boiko Pdf

This book presents a comprehensive survey of the origin of turbulence in near-wall shear layer flows. Instead of going too far into details modern approaches to the problem are discussed in a conceptual treatment. The transition from laminar to turbulent flows in shear layers is described including the generation of flow perturbations, their amplification and development, the breakdown of the initial laminar state, and transformation to a turbulent regime. This book also presents new approaches to boundary-layer transitions with strong external-flow perturbations and to the prediction and control of the presented near-wall transitions to turbulence. This book is addressed to researchers, lecturers and students in engineering, physics and mathematics.

Seventh IUTAM Symposium on Laminar-Turbulent Transition

Philipp Schlatter,Dan S. Henningson
Seventh IUTAM Symposium on Laminar Turbulent Transition Book PDF

Author : Philipp Schlatter,Dan S. Henningson
Publisher : Springer Science & Business Media
Page : 628 pages
File Size : 55,8 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.