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Author | : William J. Layton |
Publisher | : Springer Science & Business Media |
Total Pages | : 190 |
Release | : 2012-01-07 |
Genre | : Mathematics |
ISBN | : 3642244084 |
Download Approximate Deconvolution Models of Turbulence Book in PDF, ePub and Kindle
This volume presents a mathematical development of a recent approach to the modeling and simulation of turbulent flows based on methods for the approximate solution of inverse problems. The resulting Approximate Deconvolution Models or ADMs have some advantages over more commonly used turbulence models – as well as some disadvantages. Our goal in this book is to provide a clear and complete mathematical development of ADMs, while pointing out the difficulties that remain. In order to do so, we present the analytical theory of ADMs, along with its connections, motivations and complements in the phenomenology of and algorithms for ADMs.
Author | : William J. Layton |
Publisher | : Springer |
Total Pages | : 190 |
Release | : 2012-01-06 |
Genre | : Mathematics |
ISBN | : 3642244092 |
Download Approximate Deconvolution Models of Turbulence Book in PDF, ePub and Kindle
This volume presents a mathematical development of a recent approach to the modeling and simulation of turbulent flows based on methods for the approximate solution of inverse problems. The resulting Approximate Deconvolution Models or ADMs have some advantages over more commonly used turbulence models – as well as some disadvantages. Our goal in this book is to provide a clear and complete mathematical development of ADMs, while pointing out the difficulties that remain. In order to do so, we present the analytical theory of ADMs, along with its connections, motivations and complements in the phenomenology of and algorithms for ADMs.
Author | : William Layton |
Publisher | : MDPI |
Total Pages | : 229 |
Release | : 2018-05-04 |
Genre | : |
ISBN | : 3038428094 |
Download Turbulence: Numerical Analysis, Modelling and Simulation Book in PDF, ePub and Kindle
This book is a printed edition of the Special Issue "Turbulence: Numerical Analysis, Modelling and Simulation" that was published in Fluids
Author | : Eric Garnier |
Publisher | : Springer Science & Business Media |
Total Pages | : 280 |
Release | : 2009-08-11 |
Genre | : Science |
ISBN | : 9048128196 |
Download Large Eddy Simulation for Compressible Flows Book in PDF, ePub and Kindle
This book addresses both the fundamentals and the practical industrial applications of Large Eddy Simulation (LES) in order to bridge the gap between LES research and the growing need to use it in engineering modeling.
Author | : Luigi Carlo Berselli |
Publisher | : Springer Science & Business Media |
Total Pages | : 378 |
Release | : 2006 |
Genre | : Computers |
ISBN | : 9783540263166 |
Download Mathematics of Large Eddy Simulation of Turbulent Flows Book in PDF, ePub and Kindle
The LES-method is rapidly developing in many practical applications in engineering The mathematical background is presented here for the first time in book form by one of the leaders in the field
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Publisher | : |
Total Pages | : |
Release | : 2021 |
Genre | : |
ISBN | : |
Download IMPROVING THE TEMPORAL ACCURACY OF TURBULENCE MODELS AND RESOLVING THE IMPLEMENTATION ISSUES OF FLUID FLOW MODELING Book in PDF, ePub and Kindle
Abstract : A sizeable proportion of the work in this thesis focuses on a new turbulence model, dubbed ADC (the approximate deconvolution model with defect correction). The ADC is improved upon using spectral deferred correction, a means of constructing a higher order ODE solver. Since both the ADC and SDC are based on a predictor-corrector approach, SDC is incorporated with essentially no additional computational cost. We will show theoretically and using numerical tests that the new scheme is indeed higher order in time than the original, and that the benefits of defect correction, on which the ADC is based, are preserved. The final two chapters in this thesis focus on a two important numerical difficulties arising in fluid flow modeling: poor mass-conservation and possible non-physical oscillations. We show that grad-div stabilization, previously assumed to have no effect on the target quantities of the test problem used, can significantly alter the results even on standard benchmark problems. We also propose a work-around and verify numerically that it has promise. Then we investigate two different formulations of Crank-Nicolson for the Navier-Stokes equations. The most attractive implementation, second order accurate for both velocity and pressure, is shown to introduce non-physical oscillations. We then propose two options which are shown to avoid the poor behavior
Author | : Pierre Sagaut |
Publisher | : World Scientific |
Total Pages | : 356 |
Release | : 2006-06-19 |
Genre | : Science |
ISBN | : 1908979879 |
Download Multiscale And Multiresolution Approaches In Turbulence Book in PDF, ePub and Kindle
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
Author | : Michel Deville |
Publisher | : Springer |
Total Pages | : 218 |
Release | : 2022-02-18 |
Genre | : Technology & Engineering |
ISBN | : 9783030658229 |
Download Turbulence and Interactions Book in PDF, ePub and Kindle
This book presents a snapshot of the state-of-art in the field of turbulence modeling, with an emphasis on numerical methods. Topics include direct numerical simulations, large eddy simulations, compressible turbulence, coherent structures, two-phase flow simulation and many more. It includes both theoretical contributions and experimental works, as well as chapters derived from keynote lectures, presented at the fifth Turbulence and Interactions Conference (TI 2018), which was held on June 25-29 in Martinique, France. This multifaceted collection, which reflects the conference ́s emphasis on the interplay of theory, experiments and computing in the process of understanding and predicting the physics of complex flows and solving related engineering problems, offers a timely guide for students, researchers and professionals in the field of applied computational fluid dynamics, turbulence modeling and related areas.
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Publisher | : |
Total Pages | : 0 |
Release | : 2023 |
Genre | : |
ISBN | : |
Download HIGHER ACCURACY MODELS AND VALIDATION OF LES-C TURBULENCE MODELS Book in PDF, ePub and Kindle
Abstract : In Labovsky (2020), a new family of turbulence models named Large Eddy Simulation with Correction (LES-C) has been proposed to reduce the modeling error of Large Eddy Simulation (LES) models. There a predictor-corrector technique called defect correction was used, treating a Large Eddy Simulation(LES) model as the defect solution and then correcting it on the same spatial mesh in the correction step. Chapter 2, Chapter 4, and Chapter 5 of this dissertation are based on the studies on LES-C models. Chapter 2 presents a model to reduce the time discretization error of the LES-C models using the deferred correction technique. Since the temporal accuracy was gained by adding several terms to the right-hand side of the correction step of the existing LES-C structure, the accuracy was gained at no additional computational cost. It was demonstrated using the Approximate Deconvolution Model (ADM) in the LES family and the new model was named ADC with deferred correction. Chapter 3 describes the effect of the standard and modular grad-div stabilization with Taylor-Hood finite elements on drag/lift coefficient comparing it with the calculations of Scott-Vogelius finite elements. The Chapter 4 proposes a model to improve the accuracy of the MagnetoHydroDynamic(MHD) system that is written in Elsˊþasser variables. It was developed in the LES-C framework aiming to reduce both temporal and modeling errors of the existing turbulent model. It was demonstrated using ADM(MHD-ADM) in the LES family and through the numerical tests it was shown the superiority of the new model MHD- ADC over MHD-ADM. The Chapter 5 investigates four LES-C models namely ADC, Leray-Ɑ-C, NS-Ɑ-C, and NS-ꞷ-C which developed from the popular LES models ADM, Leray-Ɑ, NS-Ɑ, and NS-ꞷ by performing the analysis for three benchmark problems: flow past a circular object, flow past a step, and benchmark problem of turbulent 3D channel flow.
Author | : James C. Robinson |
Publisher | : Cambridge University Press |
Total Pages | : 275 |
Release | : 2012-10-18 |
Genre | : Mathematics |
ISBN | : 1139577212 |
Download Mathematical Aspects of Fluid Mechanics Book in PDF, ePub and Kindle
The rigorous mathematical theory of the equations of fluid dynamics has been a focus of intense activity in recent years. This volume is the product of a workshop held at the University of Warwick to consolidate, survey and further advance the subject. The Navier–Stokes equations feature prominently: the reader will find new results concerning feedback stabilisation, stretching and folding, and decay in norm of solutions to these fundamental equations of fluid motion. Other topics covered include new models for turbulent energy cascade, existence and uniqueness results for complex fluids and certain interesting solutions of the SQG equation. The result is an accessible collection of survey articles and more traditional research papers that will serve both as a helpful overview for graduate students new to the area and as a useful resource for more established researchers.