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Evaluation of Subgrid-scale Turbulence Models Using a Fully Siimulated Turbulent Flow

Evaluation of Subgrid-scale Turbulence Models Using a Fully Siimulated Turbulent Flow
Author: R. A. Clark
Publisher:
Total Pages: 0
Release: 1977
Genre:
ISBN:

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This paper begins with a brief discussion of the general approach to the numerical simulation of turbulent flows. The traditional approaches have been based on Reynolds' original idea of averaging the Navier-Stokes equations over.


Multiscale And Multiresolution Approaches In Turbulence

Multiscale And Multiresolution Approaches In Turbulence
Author: Pierre Sagaut
Publisher: World Scientific
Total Pages: 356
Release: 2006-06-19
Genre: Science
ISBN: 1908979879

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This unique book gives a general unified presentation of the use of the multiscale/multiresolution approaches in the field of turbulence. The coverage ranges from statistical models developed for engineering purposes to multiresolution algorithms for the direct computation of turbulence. It provides the only available up-to-date reviews dealing with the latest and most advanced turbulence models (including LES, VLES, hybrid RANS/LES, DES) and numerical strategies.The book aims at providing the reader with a comprehensive description of modern strategies for turbulent flow simulation, ranging from turbulence modeling to the most advanced multilevel numerical methods./a


Turbulent Shear Flows I

Turbulent Shear Flows I
Author: F. Durst
Publisher: Springer Science & Business Media
Total Pages: 415
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 3642463959

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The present book contains papers that have been selected from contributions to the First International Symposium on Turbulent Shear Flows which was held from the 18th to 20th April 1977 at The Pennsylvania State University, University Park, Pennsylvania, USA. Attend ees from close to 20 countries presented over 100 contributions at this meeting in which many aspects of the current activities in turbulence research were covered. Five topics received particular attention at the Symposium: Free Flows Wall Flows Recirculating Flows Developments in Reynolds Stress Closures New Directions in Modeling This is also reflected in the five chapters of this book with contributions from research workers from different countries. Each chapter covers the most valuable contributions of the conference to the particular chapter topic. Of course, there were many additional good con tributions to each subject at the meeting but the limitation imposed on the length of this volume required that a selection be made. The realization of the First International Symposium on Turbulent Shear Flows was p- sible by the general support of: U. S. Army Research Office U. S. Navy Research Office Continuing Education Center of The Pennsylvania State University The conference organization was carried out by the organizing committee consisting of: F. Durst, Universitat Karlsruhe, Karlsruhe, Fed. Rep. of Germany V. W. Goldschmidt, Purdue University, West Lafayette, Ind. , USA B. E. Launder, University of California, Davis, Calif. , USA F. W. Schmidt, Pennsylvania State University, University Park, Penna.


Improved Turbulence Models Based on Large Eddy Simulation of Homogeneous, Incompressible, Turbulent Flows

Improved Turbulence Models Based on Large Eddy Simulation of Homogeneous, Incompressible, Turbulent Flows
Author: Stanford University. Thermosciences Division. Thermosciences Division
Publisher:
Total Pages: 200
Release: 1983
Genre: Eddies
ISBN:

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The physical bases of large eddy simulation and the subgrid scale modeling it employs are studied in some detail. This investigation leads to a new scale-similarity model for the subgrid-scale turbulent Reynolds stresses.


Large-Eddy Simulations of Turbulence

Large-Eddy Simulations of Turbulence
Author: M. Lesieur
Publisher: Cambridge University Press
Total Pages: 240
Release: 2005-08-22
Genre: Mathematics
ISBN: 9780521781244

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Large-Eddy Simulations of Turbulence is a reference for LES, direct numerical simulation and Reynolds-averaged Navier-Stokes simulation.


Multiscale And Multiresolution Approaches In Turbulence - Les, Des And Hybrid Rans/les Methods: Applications And Guidelines (2nd Edition)

Multiscale And Multiresolution Approaches In Turbulence - Les, Des And Hybrid Rans/les Methods: Applications And Guidelines (2nd Edition)
Author: Pierre Sagaut
Publisher: World Scientific
Total Pages: 446
Release: 2013-03-25
Genre: Mathematics
ISBN: 1848169884

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The book aims to provide the reader with an updated general presentation of multiscale/multiresolution approaches in turbulent flow simulations. All modern approaches (LES, hybrid RANS/LES, DES, SAS) are discussed and recast in a global comprehensive framework. Both theoretical features and practical implementation details are addressed. Some full scale applications are described, to provide the reader with relevant guidelines to facilitate a future use of these methods./a


Tests of Subgrid-Scale Models in Strained Turbulence. Studies of the Structure of Homogeneous Shear Flows. Developing a Model of Turbulence Near a Wall from Solutions of the Navier-Stokes Equations

Tests of Subgrid-Scale Models in Strained Turbulence. Studies of the Structure of Homogeneous Shear Flows. Developing a Model of Turbulence Near a Wall from Solutions of the Navier-Stokes Equations
Author: J. H. Ferziger
Publisher:
Total Pages: 52
Release: 1982
Genre:
ISBN:

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Three studies are described, each of which makes use of turbulent flow fields calculated using the Navier-Stokes equations. In the first study, exact numerical solutions of the full Navier-Stokes equations are used to evaluate subgrid-scale models used in large-eddy simulations. The flows investigated are homogeneous and incompressible with strong imposed mean strain or shear. Models evaluated include the conventional Smagorinsky model as well as a recently introduced formulation based on the notion of scale similarity. In the second study, exact numberical simulations of homogeneous shear flows are examined using various computer-graphic tools, the aim being to attempt to understand the mechanisms underlying the production of turbulence energy and growth of length scales in such flows. The subject of the third study is the development of a computational model of the viscous sublayer of wall-bounded incompressible turbulent flow. In this work, the time-dependent Navier-Stokes equations, suitably simplified, are solved subject to boundary conditions imposed at the outer edge of the viscous sublayer. The formulation of these edge conditions so that computed average distributions of turbulence quantities agree with experimental data through the sublayer is the essence of work.


Modeling Complex Turbulent Flows

Modeling Complex Turbulent Flows
Author: Manuel D. Salas
Publisher: Springer Science & Business Media
Total Pages: 402
Release: 1999-04-30
Genre: Science
ISBN: 9780792355908

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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.