Modeling Complex Turbulent Flows
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Modeling Complex Turbulent Flows
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Author : Manuel D. Salas
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Modeling Complex Turbulent Flows written by Manuel D. Salas and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Turbulence modeling both addresses a fundamental problem in physics, 'the last great unsolved problem of classical physics,' and has far-reaching importance in the solution of difficult practical problems from aeronautical engineering to dynamic meteorology. However, the growth of supercom puter facilities has recently caused an apparent shift in the focus of tur bulence research from modeling to direct numerical simulation (DNS) and large eddy simulation (LES). This shift in emphasis comes at a time when claims are being made in the world around us that scientific analysis itself will shortly be transformed or replaced by a more powerful 'paradigm' based on massive computations and sophisticated visualization. Although this viewpoint has not lacked ar ticulate and influential advocates, these claims can at best only be judged premature. After all, as one computational researcher lamented, 'the com puter only does what I tell it to do, and not what I want it to do. ' In turbulence research, the initial speculation that computational meth ods would replace not only model-based computations but even experimen tal measurements, have not come close to fulfillment. It is becoming clear that computational methods and model development are equal partners in turbulence research: DNS and LES remain valuable tools for suggesting and validating models, while turbulence models continue to be the preferred tool for practical computations. We believed that a symposium which would reaffirm the practical and scientific importance of turbulence modeling was both necessary and timely.
Modeling Complex Turbulent Flows
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Author : Xiaohua Wang
language : en
Publisher:
Release Date : 2000
Modeling Complex Turbulent Flows written by Xiaohua Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Turbulence categories.
Calculation Of Complex Turbulent Flows
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Author : George Tzabiras
language : en
Publisher: Advances in Fluid Mechanics
Release Date : 2000
Calculation Of Complex Turbulent Flows written by George Tzabiras and has been published by Advances in Fluid Mechanics this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
A selection of invited chapters focusing on developments in the application of Computational Fluid Dynamics (CFD) to compressible or incompressible flows dominated by turbulence effects. These may be applied to complex geometrical configurations or flow-fields in simpler geometries requiring higher-order turbulence modelling, or suitably modified low-order models, to calculate crucial parameters such as instabilities, transition, separation, accurate description of velocity and scalar fields, and local and total forces.
Turbulent Flows
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Author : G. Biswas
language : en
Publisher: CRC Press
Release Date : 2002
Turbulent Flows written by G. Biswas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.
This book allows readers to tackle the challenges of turbulent flow problems with confidence. It covers the fundamentals of turbulence, various modeling approaches, and experimental studies. The fundamentals section includes isotropic turbulence and anistropic turbulence, turbulent flow dynamics, free shear layers, turbulent boundary layers and plumes. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more.
Non Equilibrium Modeling Of Complex Turbulent Flows
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Author :
language : en
Publisher:
Release Date : 1998
Non Equilibrium Modeling Of Complex Turbulent Flows written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
The non-equilibrium modeling of complex turbulent flows is considered from a theoretical standpoint. Both two-equation models and full second-order closures are considered. Non-equilibrium two-equation models can be obtained via a regularization scheme based on a Pade' approximation. Second-order closures that are extended to non-equilibrium flows are obtained in the same fashion. Applications to rapidly distorted flows - including homogeneous shear flow and homogeneous plane strain turbulence - are considered. The prospects for future research are discussed in detail.
On Explicit Algebraic Stress Models For Complex Turbulent Flows
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Author : T. B. Gatski
language : en
Publisher:
Release Date : 1992
On Explicit Algebraic Stress Models For Complex Turbulent Flows written by T. B. Gatski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Strains and stresses categories.
Implicit Large Eddy Simulation
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Author : Fernando F. Grinstein
language : en
Publisher: Cambridge University Press
Release Date : 2007-07-30
Implicit Large Eddy Simulation written by Fernando F. Grinstein and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-07-30 with Technology & Engineering categories.
The numerical simulation of turbulent flows is a subject of great practical importance to scientists and engineers. The difficulty in achieving predictive simulations is perhaps best illustrated by the wide range of approaches that have been developed and are still being used by the turbulence modeling community. In this book the authors describe one of these approaches, Implicit Large Eddy Simulation (ILES). ILES is a relatively new approach that combines generality and computational efficiency with documented success in many areas of complex fluid flow. This book synthesizes the theoretical basis of the ILES methodology and reviews its accomplishments. ILES pioneers and lead researchers combine here their experience to present a comprehensive description of the methodology. This book should be of fundamental interest to graduate students, basic research scientists, as well as professionals involved in the design and analysis of complex turbulent flows.
Complex Turbulent Flows Taxonomies Reporters Summaries Evaluation And Conclusion
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Author : Stephen J. Kline
language : en
Publisher:
Release Date : 1981
Complex Turbulent Flows Taxonomies Reporters Summaries Evaluation And Conclusion written by Stephen J. Kline and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Fluid dynamics categories.
Turbulent Flows
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Author : Jean Piquet
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17
Turbulent Flows written by Jean Piquet and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Technology & Engineering categories.
obtained are still severely limited to low Reynolds numbers (about only one decade better than direct numerical simulations), and the interpretation of such calculations for complex, curved geometries is still unclear. It is evident that a lot of work (and a very significant increase in available computing power) is required before such methods can be adopted in daily's engineering practice. I hope to l"Cport on all these topics in a near future. The book is divided into six chapters, each· chapter in subchapters, sections and subsections. The first part is introduced by Chapter 1 which summarizes the equations of fluid mechanies, it is developed in C~apters 2 to 4 devoted to the construction of turbulence models. What has been called "engineering methods" is considered in Chapter 2 where the Reynolds averaged equations al"C established and the closure problem studied (§1-3). A first detailed study of homogeneous turbulent flows follows (§4). It includes a review of available experimental data and their modeling. The eddy viscosity concept is analyzed in §5 with the l"Csulting ~alar-transport equation models such as the famous K-e model. Reynolds stl"Css models (Chapter 4) require a preliminary consideration of two-point turbulence concepts which are developed in Chapter 3 devoted to homogeneous turbulence. We review the two-point moments of velocity fields and their spectral transforms (§ 1), their general dynamics (§2) with the particular case of homogeneous, isotropie turbulence (§3) whel"C the so-called Kolmogorov's assumptions are discussed at length.
Second Moment Closure Modeling Of Complex Turbulent Flows
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Author : Sharath Girimaji
language : en
Publisher:
Release Date : 2007
Second Moment Closure Modeling Of Complex Turbulent Flows written by Sharath Girimaji and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Turbulence categories.
Turbulence subject to unsteady forcing can exhibit novel features that cannot be explained using the well-known steady-turbulence paradigm. Modeling and prediction of such statistically unsteady flows are important in many practical AFOSR applications: turbine flows, wake-flows with vortex shedding, etc. Further, many flow control strategies depend upon the knowledge of unsteady turbulence dynamics to achieve the desired objectives. However, our understanding of unsteadily-forced turbulence dynamics or our ability to predict them is inadequate.