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Direct and Large Eddy Simulation I

Direct and Large Eddy Simulation I Author Peter R. Voke
ISBN-10 9789401110006
Release 2012-12-06
Pages 434
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It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.

Direct and Large Eddy Simulation IV

Direct and Large Eddy Simulation IV Author Bernard Geurts
ISBN-10 9789401712637
Release 2013-06-29
Pages 530
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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.

Direct and Large Eddy Simulation II

Direct and Large Eddy Simulation II Author Jean-Pierre Chollet
ISBN-10 9789401156240
Release 2012-12-06
Pages 426
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Progress in the numerical simulation of turbulence has been rapid in the 1990s. New techniques both for the numerical approximation of the Navier-Stokes equations and for the subgrid-scale models used in large-eddy simulation have emerged and are being widely applied for both fundamental and applied engineering studies, along with novel ideas for the performance and use of simulation for compressible, chemically reacting and transitional flows. This collection of papers from the second ERCOFTAC Workshop on Direct and Large-Eddy Simulation, held in Grenoble in September 1996, presents the key research being undertaken in Europe and Japan on these topics. Describing in detail the ambitious use of DNS for fundamental studies and of LES for complex flows of potential and actual engineering importance, this volume will be of interest to all researchers active in the area.

Computational Electromagnetics and Its Applications

Computational Electromagnetics and Its Applications Author Thomas G. Campbell
ISBN-10 0792347331
Release 1997-09-30
Pages 320
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This volume contains the proceedings of the first ICASE/LaRC Work shop on Computational Electromagnetics and Its Applications conducted by the Institute for Computer Applications in Science and Engineering and NASA Langley Research Center. We had several goals in mind when we decided, jointly with the Elec tromagnetics Research Branch, to organize this workshop on Computa tional Electromagnetics ( CEM). Among our goals were a desire to obtain an overview of the current state of CEM, covering both algorithms and ap plications and their effect on NASA's activities in this area. In addition, we wanted to provide an attractive setting for computational scientists with expertise in other fields, especially computational fluid dynamics (CFD), to observe the algorithms and tools of CEM at work. Our expectation was that scientists from both fields would discover mutually beneficial inter connections and relationships. Another goal was to learn of progress in solution algorithms for electromagnetic optimization and design problems; such problems make extensive use of field solvers and computational effi ciency is at a premium. To achieve these goals we assembled the renowned group of speakers from academia and industry whose talks are contained in this volume. The papers are printed in the same order in which the talks were pre sented at the meeting. The first paper is an overview of work currently being performed in the Electromagnetic Research Branch at the Langley Research Center.

Direct and Large Eddy Simulation IX

Direct and Large Eddy Simulation IX Author Jochen Fröhlich
ISBN-10 9783319144481
Release 2015-01-27
Pages 700
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This volume reflects the state of the art of numerical simulation of transitional and turbulent flows and provides an active forum for discussion of recent developments in simulation techniques and understanding of flow physics. Following the tradition of earlier DLES workshops, these papers address numerous theoretical and physical aspects of transitional and turbulent flows. At an applied level it contributes to the solution of problems related to energy production, transportation, magneto-hydrodynamics and the environment. A special session is devoted to quality issues of LES. The ninth Workshop on 'Direct and Large-Eddy Simulation' (DLES-9) was held in Dresden, April 3-5, 2013, organized by the Institute of Fluid Mechanics at Technische Universität Dresden. This book is of interest to scientists and engineers, both at an early level in their career and at more senior levels.

Advances in Turbulence Seven

Advances in Turbulence Seven Author Uriel Frisch
ISBN-10 0792351150
Release 1998-01-01
Pages 613
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This volume contains an overview of the state of turbulence research with some bias towards work done in Europe. It represents an almost complete collection of the invited and contributed papers delivered at the Seventh European Turbulence Conference, sponsored by EUROMECH and ERCOFTAC and organized by the Observatoire de la Cote d'Azur. High-Reynolds number experiments combined with techniques of imaging, non-intrusive probing, processing and simulation provide high-quality data which put significant constraints on possible theories. For the first time, it has been shown, for a class of passive scalar problems, why dimensional analysis sometimes gives the wrong answers and how anomalous intermittency corrections can be calculated from first principles. The volume is thus geared towards specialists in the area of flow turbulence who could not attend the conference as well as anybody interested in this rapidly-moving field.

Engineering Turbulence Modelling and Experiments 6

Engineering Turbulence Modelling and Experiments 6 Author Wolfgang Rodi
ISBN-10 0080530958
Release 2005-05-05
Pages 1012
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Proceedings of the world renowned ERCOFTAC (International Symposium on Engineering Turbulence Modelling and Measurements). The proceedings include papers dealing with the following areas of turbulence: · Eddy-viscosity and second-order RANS models · Direct and large-eddy simulations and deductions for conventional modelling · Measurement and visualization techniques, experimental studies · Turbulence control · Transition and effects of curvature, rotation and buoyancy on turbulence · Aero-acoustics · Heat and mass transfer and chemically reacting flows · Compressible flows, shock phenomena · Two-phase flows · Applications in aerospace engineering, turbomachinery and reciprocating engines, industrial aerodynamics and wind engineering, and selected chemical engineering problems Turbulence remains one of the key issues in tackling engineering flow problems. These problems are solved more and more by CFD analysis, the reliability of which depends strongly on the performance of the turbulence models employed. Successful simulation of turbulence requires the understanding of the complex physical phenomena involved and suitable models for describing the turbulent momentum, heat and mass transfer. For the understanding of turbulence phenomena, experiments are indispensable, but they are equally important for providing data for the development and testing of turbulence models and hence for CFD software validation. As in other fields of Science, in the rapidly developing discipline of turbulence, swift progress can be achieved only by keeping up to date with recent advances all over the world and by exchanging ideas with colleagues active in related fields.

IUTAM Symposium on Discretization Methods in Structural Mechanics

IUTAM Symposium on Discretization Methods in Structural Mechanics Author H.A. Mang
ISBN-10 STANFORD:36105021928135
Release 1999-03-31
Pages 378
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Proceedings of the IUTAM Symposium held in Vienna, Austria, 2-6 June 1997

Advances in turbulence VI

Advances in turbulence VI Author Spyros Gavrilakis
ISBN-10 0792341325
Release 1996
Pages 627
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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.

Waves and Nonlinear Processes in Hydrodynamics

Waves and Nonlinear Processes in Hydrodynamics Author John Grue
ISBN-10 UCSD:31822023834229
Release 1996-05-31
Pages 402
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In December 1994 Professor Enok Palm celebrated his 70th birthday and retired after more than forty years of service at the University of Oslo. In view of his outstanding achievements as teacher and scientist a symposium entitled "Waves and Nonlinear Processes in Hydrodynamics" was held in his honour from the 17th to the 19th November 1994 in the locations of The Norwegian Academy of Science and Letters in Oslo. The topics of the symposium were chosen to cover Enok's broad range of scientific work, interests and accomplishments: Marine hydrodynamics, nonlinear wave theory, nonlinear stability, thermal convection and geophys ical fluid dynamics, starting with Enok's present activity, ending with the field where he began his career. This order was followed in the symposium program. The symposium had two opening lectures. The first looked back on the history of hydrodynamic research at the University of Oslo. The second focused on applications of hydrodynamics in the offshore industry today.

International Aerospace Abstracts

International Aerospace Abstracts Author
ISBN-10 STANFORD:36105016772530
Release 1995
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International Aerospace Abstracts has been writing in one form or another for most of life. You can find so many inspiration from International Aerospace Abstracts also informative, and entertaining. Click DOWNLOAD or Read Online button to get full International Aerospace Abstracts book for free.

Advances in turbulence V

Advances in turbulence V Author Roberto Benzi
ISBN-10 0792330323
Release 1995
Pages 595
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Turbulence - the chaotic behaviour of fluid flows - has attracted the interest of many scientists for many decades, and the number is still growing. Turbulence is one of the most challenging classical problems that still require solution. But it is not only a scientific problem: the control of turbulence and turbulent transport are the key to many engineering problems. The Euromech Committee has organised a European Turbulence Conference every two years, starting in 1986, with the 5th Conference in the series taking place in Sienna, Italy, in July 1994. The work presented at this meeting is published in Advances in Turbulence V, providing a complete overview of the most recent research work on the subject.

Functional analysis

Functional analysis Author L. P. Lebedev
ISBN-10 0792338499
Release 1996
Pages 239
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This is a book for people who want to use functional analysis to justify approximate methods in Mechanics and Inverse Problems. It provides such researchers with the tools they need without having to assimilate or skip through concepts they do not need. The essence of functional analysis is abstraction: from the everyday ideas of 3-dimensional space and distance, one abstracts the concepts of metric space and metric. The properties of this metric are laid down as axioms on which all subsequent arguments are based. The vocabulary of functional analysis consists largely of terms which originally appeared either in geometry or in connection with the real line: set, closed, open, bounded, compact, inner-product, etc.; in functional analysis they are defined abstractly. For the applied mathematician the essential difficulty attending the study of functional analysis is that the pure mathematicians who have developed the field have carried the process of abstraction to increasingly higher levels. In this book the authors have kept the level of abstraction high enough for the majority of applications, and have resisted the temptation to abstract to the limit. The book starts from scratch with a chapter on real numbers and functions. Chapter 2 introduces metric spaces, including the concept of a complete space and Banach's contraction mapping theorem; normed linear spaces, and inner product spaces. An excursion into some boundary value problems in Mechanics leads up to the concept of a generalized solution, and to Sobolev space. A study of approximation in Hilbert space leads to Riesz's representation theorem. An introduction to linear operators is followed by a chapter on the essential, but often misunderstood concept of a compact set. En route the mysteries of weakly closed, weakly convergent, sequential compactness, compact operator, singular value decomposition, etc. are revealed. The final chapter shows how the language of functional analysis is ideally suited to elucidate and justify the regularisation methods for the ill-posed inverse problems exemplified by Fredholm integral equations of the first kind.

IUTAM Symposium on Numerical Simulation of Non Isothermal Flow of Viscoelastic Liquids

IUTAM Symposium on Numerical Simulation of Non Isothermal Flow of Viscoelastic Liquids Author J. F. Dijksman
ISBN-10 UOM:39015034229537
Release 1995
Pages 195
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During the last decades a considerable effort has been made on the computation of the isothermal flow of viscoelastic fluids. In fact the activities related to this particular field of non-Newtonian fluid mechanics have focused on the following questions: which type of constitutive equation describes non-Newtonian fluid behaviour; how to measure fluid parameters; and what type of computational scheme leads to reliable, stable and cost-effective computer programs. During the same period, typical non-Newtonian fluid phenomena have been experimentally examined, such as the flow through a `four-to-one' contraction, the flow around a sphere or separation flow, providing fresh challenges for numerical modellers. Apart from momentum transport, however, fluid flow is strongly influenced by heat treansport in most real industrial operations in which non-Newtonian fluids are processed. The IUTAM Symposium on `Numerical Simulation of Nonisothermal Flow of Viscoelastic Liquids' held at Rolduc Abbey in Kerkrade, the Netherlands, November 1--3, 1993, was organised to monitor the state of affairs in regard to the influence of nonisothermal effects on the flow of a viscoelastic liquid. The present collection of papers gives an overview of what has been achieved so far. It is a milestone in the rapidly emerging and exciting new field in non-Newtonian fluid mechanics.

Proceedings of the IUTAM Symposium Held in Eindhoven the Netherlands 21 26 April 1996

Proceedings of the IUTAM Symposium Held in Eindhoven  the Netherlands  21 26 April 1996 Author Dick H. van Campen
ISBN-10 0792344294
Release 1997-01-01
Pages 443
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This volume contains 51 contributions presented at the IUTAM Symposium on Interaction between Dynamics and Control in Advanced Mechanical Systems. The Symposium brought together scientists active in various fields of both dynamics and control, and stimulated the interaction of the two with respect to advanced engineering applications. The papers presented address a wide variety of applications ranging from vehicle systems to mechatronic systems. Furthermore, the relevance of more fundamental areas such as control of chaos and optimal control is illuminated. This volume presents a valuable collection of papers and promotes further theoretical and applied investigations with respect to the interaction of dynamics and control. The volume will be of assistance to scientists and engineers working in the fields of dynamics and control.

Applied Mechanics Reviews

Applied Mechanics Reviews Author
ISBN-10 UCSD:31822023024888
Release 1995
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Applied Mechanics Reviews has been writing in one form or another for most of life. You can find so many inspiration from Applied Mechanics Reviews also informative, and entertaining. Click DOWNLOAD or Read Online button to get full Applied Mechanics Reviews book for free.

American Book Publishing Record

American Book Publishing Record Author
ISBN-10 UOM:39015033851158
Release 1995
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American Book Publishing Record has been writing in one form or another for most of life. You can find so many inspiration from American Book Publishing Record also informative, and entertaining. Click DOWNLOAD or Read Online button to get full American Book Publishing Record book for free.