Progress in Turbulence VIII

This volume collects the edited and reviewed contributions presented in the 8th iTi Conference on Turbulence, held in Bertinoro, Italy, in September 2018.

Progress in Turbulence VIII

This volume collects the edited and reviewed contributions presented in the 8th iTi Conference on Turbulence, held in Bertinoro, Italy, in September 2018. In keeping with the spirit of the conference, the book was produced afterwards, so that the authors had the opportunity to incorporate comments and discussions raised during the event. The respective contributions, which address both fundamental and applied aspects of turbulence, have been structured according to the following main topics: I TheoryII Wall-bounded flowsIII Simulations and modellingIV ExperimentsV Miscellaneous topicsVI Wind energy/div

Progress in Turbulence VIII

This volume collects the edited and reviewed contributions presented in the 8th iTi Conference on Turbulence, held in Bertinoro, Italy, in September 2018.

Progress in Turbulence VIII

This volume collects the edited and reviewed contributions presented in the 8th iTi Conference on Turbulence, held in Bertinoro, Italy, in September 2018. In keeping with the spirit of the conference, the book was produced afterwards, so that the authors had the opportunity to incorporate comments and discussions raised during the event. The respective contributions, which address both fundamental and applied aspects of turbulence, have been structured according to the following main topics: I Theory II Wall-bounded flows III Simulations and modelling IV Experiments V Miscellaneous topics VI Wind energy.

Direct Numerical Simulation of Very Large Scale Motions in Turbulent Pipe Flow

On the convergence and scaling of high-order statistical moments in turbulent pipe flow using direct numerical simulations. ... In Örlü, R., Talamelli, A., Peinke, J., and Oberlack, M., editors, Progress in Turbulence VIII, volume 226, ...

Direct Numerical Simulation of Very Large Scale Motions in Turbulent Pipe Flow

Die turbulente Rohrströmung ist nicht nur von großer Bedeutung für Anwendungen im Ingenieurbereich, sondern auch für die Grundlagenforschung von wandnaher Turbulenz. In der vorliegenden Arbeit wird die Interaktion sogenannter turbulenter Superstrukturen (engl.: very-large-scale motions, VLSMs) mit der kleinskaligen Wandturbulenz auf Basis der Methode der direkten numerischen Simulation untersucht. Dabei werden Schubspannungs-Reynoldszahlen bis Reτ = 2880 und Rohrlängen bis L = 42R berücksichtigt. Es wird das Konvergenz- und Skalierungsverhalten verschiedener statistischer Momente der Geschwindigkeitsverteilung untersucht und in Bezug auf VLSMs diskutiert. Die folgende Analyse der axialen Energietransportgleichung des gefilterten Geschwindigkeitsfeldes legt offen, dass VLSMs Energie von der mittleren Strömung zugeführt bekommen, ähnlich den kleinskaligen Strukturen durch den turbulenten Produktionsmechanismus. Die verschiedenen Terme der Energiebilanz werden sowohl anhand von mittleren Profilen, als auch instantanen Strömungsvisualisierungen und drei-dimensionalen Korrelationen diskutiert, wobei auch auf das Phänomen der inversen turbulenten Energiekaskade eingegangen wird. Die Forschungsarbeit gewährt dabei neue Einblicke in die Interaktion der VLSMs mit dem turbulenten Wandzyklus und trägt zum besseren Verständnis der turbulenten Rohrströmung bei. Turbulent pipe flow is not only of importance to engineering applications but also of fundamental interest to the study of wall-bounded turbulence. In the present work, the interaction of the so-called very-large-scale motions (VLSMs) with the near-wall, small-scale turbulence is explored by means of direct numerical simulation for friction Reynolds numbers up to Reτ = 2880 and pipe lengths up to L = 42R. Besides, the convergence and the scaling of different order moments of the velocity distribution are studied and also discussed with regard to VLSMs. The subsequent analysis of the streamwise energy budget equation of the filtered velocity field reveals that VLSMs obtain their energy from the mean velocity field via a production mechanism similar to the one known from the near-wall cycle. Moreover, the different energy budget terms are investigated by means of statistical averages, instantaneous flow field visualisations, and three-dimensional correlations, wherein the backscattering phenomenon is also dealt with. In brief, the research sheds new light on our understanding of the interaction between VLSMs and the near-wall cycle and leads to a better grasp of turbulent pipe flow in general.

Advances in Turbulence XI

Proceedings of the 11th EUROMECH European Turbulence Conference, June 25-28, 2007, Porto, Portugal J. M. L. M. Palma, ... 662 K. Takashima, S. Koyama and Y. Hagiwara Invited Speaker VIII Progress in Large Eddy Simulation Modeling of ...

Advances in Turbulence XI

This volume comprises the communications presented at the ETC 11, the EUROMECH European Turbulence conference held in 2007 in Porto. The scientific committee has chosen the contributions out of the following topics: 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; MHD turbulence; Reacting and compressible turbulence; Transport and mixing; Turbulence in multiphase and non-Newtonian flows; Vortex dynamics and structure formation; Wall bounded flows.

Direct and Large Eddy Simulation IV

In Advances in Turbulence VIII, Proceedings of 8th European Turbulence Conference, Barcelona, 527–530. Domaradzki, J. A. and Saiki, E. M. (1997). A subgrid-scale model based on the estimation of unresolved scales of turbulence. Phys.

Direct and Large Eddy Simulation IV

This volume contains the proceedings of the 2001 DLES4 workshop. It describes and discusses state-of-the-art modeling and simulation approaches for complex flows. Fundamental turbulence and modeling issues but also elements from modern numerical analysis are at the heart of this field of interest.

Proceedings of XXIV AIMETA Conference 2019

In: Noise Sources in Turbulent Shear Flows: Fundamentals and Applications. ... In: Progress in Turbulence VIII, Springer Proceedings of the iTi Conference in Turbulence 2018 (2019) Numerical Simulation of Shock Boundary Layer ...

Proceedings of XXIV AIMETA Conference 2019

This book gathers the peer-reviewed papers presented at the XXIV Conference of the Italian Association of Theoretical and Applied Mechanics, held in Rome, Italy, on September 15-19, 2019 (AIMETA 2019). The conference topics encompass all aspects of general, fluid, solid and structural mechanics, as well as mechanics for machines and mechanical systems, including theoretical, computational and experimental techniques and technological applications. As such the book represents an invaluable, up-to-the-minute tool, providing an essential overview of the most recent advances in the field.

Advances in Fluid Mechanics VIII

A uniqueness theorem for the mean motion equations, that follows the work of Gurtin [6], can be written for equations (3) and (4) without appeal to a turbulence model of the form given in equation (5). This result may be stated as: ...

Advances in Fluid Mechanics VIII

"The papers were presented at the eighth International Conference on Advances in Fluid Mechanics held in Portugal in 2010."--Pref.

Quantized Vortex Dynamics and Superfluid Turbulence

Finally normal fluid turbulence can also be induced directly by the boundaries. 8 Discussion I have mentioned only a selection of topics of current interest in the study of quantized vorticity. Much work is in progress.

Quantized Vortex Dynamics and Superfluid Turbulence

This book springs from the programme Quantized Vortex Dynamics and Sup- ?uid Turbulence held at the Isaac Newton Institute for Mathematical Sciences (University of Cambridge) in August 2000. What motivated the programme was the recognition that two recent developments have moved the study of qu- tized vorticity, traditionally carried out within the low-temperature physics and condensed-matter physics communities, into a new era. The ?rst development is the increasing contact with classical ?uid dynamics and its ideas and methods. For example, some current experiments with - lium II now deal with very classical issues, such as the measurement of velocity spectra and turbulence decay rates. The evidence from these experiments and many others is that super?uid turbulence and classical turbulence share many features. The challenge is now to explain these similarities and explore the time scales and length scales over which they hold true. The observed classical aspects have also attracted attention to the role played by the ?ow of the normal ?uid, which was somewhat neglected in the past because of the lack of direct ?ow visualization. Increased computing power is also making it possible to study the coupled motion of super?uid vortices and normal ?uids. Another contact with classical physics arises through the interest in the study of super?uid vortex - connections. Reconnections have been studied for some time in the contexts of classical ?uid dynamics and magneto-hydrodynamics (MHD), and it is useful to learn from the experience acquired in other ?elds.

An Informal Introduction to Turbulence

Saffman, P.G. (1978) Problems and progress in the theory of turbulence, in Structure and Mechanics of turbulence, II, ... A. (2000) Kinetic energy, enstrophy and strain rate in near-wall turbulence, Advances in turbulence, 8, 407–410.

An Informal Introduction to Turbulence

To Turbulence by ARKADY TSINOBER Department of Fluid Mechanics, Faculty of Engineering, Tel Aviv University, Tel Aviv, Israel KLUWER ACADEMIC PUBLISHERS NEW YORK, BOSTON, DORDRECHT, LONDON, MOSCOW eBookISBN: 0-306-48384-X Print ISBN: 1-4020-0110-X ©2004 Kluwer Academic Publishers NewYork, Boston, Dordrecht, London, Moscow Print ©2001 Kluwer Academic Publishers Dordrecht All rights reserved No part of this eBook maybe reproducedor transmitted inanyform or byanymeans, electronic, mechanical, recording, or otherwise, without written consent from the Publisher Created in the United States of America Visit Kluwer Online at: http://kluweronline. com and Kluwer's eBookstoreat: http://ebooks. kluweronline. com TO My WITS TABLE OF CONTENTS 1 INTRODUCTION 1 Brief history 1 1. 1 1. 2 Nature and major qualitative universal features of turbulent flows 2 1. 2. 1 Representative examples of turbulent flows 2 1. 2. 2 In lieu of definition: major qualitative universal f- tures of turbulent flows 15 1. 3 Why turbulence is so impossibly difficult? The three N's 19 On the Navier-Stokes equations 19 1. 3. 1 1. 3. 2 On the nature of the problem 21 1. 3. 3 Nonlinearity 22 1. 3. 4 Noninegrability 22 Nonlocality 1. 3. 5 23 1. 3. 6 On physics of turbulence 24 1. 3. 7 On statistical theories 24 1. 4 Outline of the following material 25 1. 5 In lieu of summary 26 2 ORIGINS OF TURBULENCE 27 2. 1 Instability 27 2. 2 Transition to turbulence versus routes to chaos 29 2.

An Informal Conceptual Introduction to Turbulence

Sandham, N. and Tsinober A. (2000) Kinetic energy, enstrophy and strain rate in near-wall turbulence, Advances in turbulence, 8, 407–410. Sanford, T.B., Carlson, J.A., Dunlap, J.H., Prater, M.D., and Lien, R.- C. (1999) An ...

An Informal Conceptual Introduction to Turbulence

This fully revised second edition focuses on physical phenomena and observations in turbulence, and is focused on reversing misconceptions and ill-defined concepts. New topics include ergodicity, Eulerian versus Lagrangian descriptions, theory validation, and anomalous scaling.

Progress in Hybrid RANS LES Modelling

Journal of Turbulence 8, 1–21 (2007) [5] Chaouat, B., Schiestel, R.: A new partially integrated transport model for subgridscale stresses and dissipation rate for turbulent developing flows. Phys. Fluids 17, 1– 19 (2005) [6] Girimaji, ...

Progress in Hybrid RANS LES Modelling

The present book contains contributions presented at the Fourth Symposium on Hybrid RANS-LES Methods, held in Beijing, China, 28-30 September 2011, being a continuation of symposia taking place in Stockholm (Sweden, 2005), in Corfu (Greece, 2007), and Gdansk (Poland, 2009). The contributions to the last two symposia were published as NNFM, Vol. 97 and Vol. 111. At the Beijing symposium, along with seven invited keynotes, another 46 papers (plus 5 posters) were presented addressing topics on Novel turbulence-resolving simulation and modelling, Improved hybrid RANS-LES methods, Comparative studies of difference modelling methods, Modelling-related numerical issues and Industrial applications.. The present book reflects recent activities and new progress made in the development and applications of hybrid RANS-LES methods in general.

Energy Research Abstracts

Quarterly progress report , 1 April 1983-30 June 1983 , 8 : 48376 ( R ; US ) Theoretical aspects of mirror fusion . Quarterly progress report , 1 July 1983-30 September 1983 , 8 : 57917 ( R ; US ) Topics in strong Langmuir turbulence ...

Energy Research Abstracts


Advances In Combustion Science

89,90 92,93 VIII . Turbulent Combustion The theory of turbulent combustion , too , continues to receive a great deal of attention . ” Citations here will be limited to a few of the recent works on premixed turbulent flame - front ...

Advances In Combustion Science


Progress in Turbulence and Wind Energy IV

This book is dedicated to the memory of Prof. Tim Nickels. Shortly after giving an invited lecture at the 4th ITI conference, the turbulence community lost a world-class scientist, a friend and devoted family man.

Progress in Turbulence and Wind Energy IV

This fourth issue on "progress in turbulence" is based on the fourth ITI conference (ITI interdisciplinary turbulence initiative), which took place in Bertinoro, North Italy. Leading researchers from the engineering and physical sciences presented latest results in turbulence research. Basic as well as applied research is driven by the rather notorious difficult and essentially unsolved problem of turbulence. In this collection of contributions clear progress can be seen in different aspects, ranging from new quality of numerical simulations to new concepts of experimental investigations and new theoretical developments. The importance of turbulence is shown for a wide range of applications including: combustion, energy, flow control, urban flows, are few examples found in this volume. A motivation was to bring fundamentals of turbulence in connection with renewable energy. This lead us to add a special topic relevant to the impact of turbulence on the wind energy conversion. The structure of the present book is as such that contributions have been bundled according to covering topics i.e. I Basic Turbulence Aspects, II Particle Laden Flows, III Modeling and Simulations, IV, Experimental Methods, V Special Flows, VI Atmospheric Boundary Layer, VII Boundary Layer, VIII Wind Energy and IX Convection. This book is dedicated to the memory of Prof. Tim Nickels. Shortly after giving an invited lecture at the 4th ITI conference, the turbulence community lost a world-class scientist, a friend and devoted family man.

Advances in Cryogenic Engineering

J. T. Tough, Superfluid turbulence, in: "Progress in Low Temperature Physics, Volume VIII,"TD. F. Brewer, ed., North Holland Publishing Co. (1982). 2. W. Arp, Heat transport through He II, Cryogenics 10:96 (1970). 3.

Advances in Cryogenic Engineering

Colorado Springs, Colorado, spectacularly located at the foot of Pike's Peak, was the site of the joint 1983 Cryogenic Engineer ing Conference - International Cryogenic Materials Conference. Over 300 papers were presented at the two conferences on a variety of cryogenic science and engineering topics. Volume 29 of Advances in Cryogenic Engineering contains 116 of the papers presented at the 1983 Cryogenic Engineering Confer ence. Each paper was comprehensively peer reviewed to maintain the international reputation of the series as the premier archival medium in the field of cryotechnology. I would like to thank both authors and reviewers for their assistance in the preparation of this volume. R. W. Fast, Editor xvii DEDICATION The cryogenic engineering community was saddened to learn of the death of A. Clark Leonard of the Royal Military College of Canada, Kingston, Ontario, on November 24, 1983. Professor Leonard was born in Prince Albert, Saskatchewan, Canada, in February, 1922. Following service in the RCAF during World War II he received his B.M.E. degree at the University of Saskatchewan. While serving with the Canadian forces in Korea, he was awarded membership in the Order of the British Empire. He received his M.S. and Ph.D. degrees in Mechanical Engineering at the University of Michigan.

Advances in Heat Transfer

VIII. Concluding Remarks The brief review of the existing prediction procedures indicates that no real progress can be made without a better understanding of the physics of turbulence phenomena. At present there are more investigators ...

Advances in Heat Transfer

Advances in Heat Transfer

Instabilities and Nonequilibrium Structures VII VIII

Despite the fact that convective instabilities and turbulence have been studied for more than a century , definite progress in understanding pattern formation , selection and stability , and the origin of chaotic behavior were achieved ...

Instabilities and Nonequilibrium Structures VII   VIII

The contents of this book correspond to Sessions VII and VIII of the International Workshop on Instabilities and Nonequilibrium Structures which took place in Viña del Mar, Chile, in December 1997 and December 1999, respectively. Part I is devoted to self-contained courses. Three courses are related to new developments in Bose-Einstein condensation: the first one by Robert Graham studies the classical dynamics of excitations of Bose condensates in anisotropic traps, the second by Marc Etienne Brachet refers to the bifurcations arising in attractive Bose-Einstein condensates and superfluid helium and the third course by André Verbeure is a pedagogical introduction to the subject with special emphasis on first principles and rigorous results. Part I is completed by two courses given by Michel Moreau: the first one on diffusion limited reactions of particles with fluctuating activity and the second on the phase boundary dynamics in a one dimensional nonequilibrium lattice gas. Part II includes a selection of invited seminars at both Workshops.

Progress in Hybrid RANS LES Modelling

The algebraic delayed detached-eddy simulation (ADDES) was utilized as turbulence model. ... New Results in Numerical and Experimental Fluid Mechanics VIII, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 121, pp.

Progress in Hybrid RANS LES Modelling

This book reports on the latest developments in computational fluid dynamics and turbulence modeling, with a special emphasis on hybrid RANS-LES methods and their industrial applications. It gathers the proceedings of the Sixth Symposium on Hybrid RANS-LES Methods, held on September 26-28 in Strasbourg, France. The different chapters covers a wealth of topics such as flow control, aero-acoustics, aero-elasticity and CFD-based multidisciplinary optimization. Further topics include wall-modelled Large Eddy Simulation (WMLES), embedded LES, Lattice-Bolzman methods, turbulence-resolving applications and comparisons between LES, hybrid RANS-LES and URANS methods. The book addresses academic researchers, graduate students, industrial engineers, as well as industrial R&D managers and consultants dealing with turbulence modelling, simulation and measurement, and with multidisciplinary applications of computational fluid dynamics.

Applied Computational Fluid Dynamics and Turbulence Modeling

VIII. on the question of the stability of fiuids. ... About Boussinesq's turbulent viscosity hypothesis: Historical remarks and a direct evaluation of its validity. Comptes Rendus Mecanique ... Progress in Aerospace Sciences, 74, 1–15.

Applied Computational Fluid Dynamics and Turbulence Modeling

This unique text provides engineering students and practicing professionals with a comprehensive set of practical, hands-on guidelines and dozens of step-by-step examples for performing state-of-the-art, reliable computational fluid dynamics (CFD) and turbulence modeling. Key CFD and turbulence programs are included as well. The text first reviews basic CFD theory, and then details advanced applied theories for estimating turbulence, including new algorithms created by the author. The book gives practical advice on selecting appropriate turbulence models and presents best CFD practices for modeling and generating reliable simulations. The author gathered and developed the book’s hundreds of tips, tricks, and examples over three decades of research and development at three national laboratories and at the University of New Mexico—many in print for the first time in this book. The book also places a strong emphasis on recent CFD and turbulence advancements found in the literature over the past five to 10 years. Readers can apply the author’s advice and insights whether using commercial or national laboratory software such as ANSYS Fluent, STAR-CCM, COMSOL, Flownex, SimScale, OpenFOAM, Fuego, KIVA, BIGHORN, or their own computational tools. Applied Computational Fluid Dynamics and Turbulence Modeling is a practical, complementary companion for academic CFD textbooks and senior project courses in mechanical, civil, chemical, and nuclear engineering; senior undergraduate and graduate CFD and turbulence modeling courses; and for professionals developing commercial and research applications.