Analysis of Weakly Compressible Turbulence Using Symmetry Methods and Direct Numerical Simulation PDF Download
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Author: Raphael Gotthard Harald Arlitt
Publisher: Cuvillier Verlag
ISBN: 3865373461
Category :
Languages : en
Pages : 221
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Book Description
Author: Raphael Gotthard Harald Arlitt
Publisher: Cuvillier Verlag
ISBN: 3865373461
Category :
Languages : en
Pages : 221
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Weakly compressible asymptotlcs and direct numerical simulation are used to investigate the effects of compressibility or high speed turbulent shear layers. The asymptotic analysis leads to a decomposition procedure that can be used to approximately determine the acoustic and nonacoustic components of a compressible flow. In boundary layers, it is found that the acoustic fluctuations are only weakly coupled to the nonacoustic, so equations describing only the nonacoustic fluctuations ((incompressible, variable density) would provide a good description of the turbulence.
Author: Jörg Volkmann
Publisher: Cuvillier Verlag
ISBN: 3867274223
Category :
Languages : en
Pages : 153
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Author: Frank Freikamp
Publisher: Cuvillier Verlag
ISBN: 3867278172
Category :
Languages : en
Pages : 139
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Author: R. Verstappen
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
We propose to perform turbulent flow simulations in such a manner that the difference operators do have the same symmetry properties as the underlying differential operators, i.e. the convective operator is represented by a skew-symmetric matrix and the diffusive operator is approximated by a symmetric, positive-definite matrix. Such a symmetry-preserving discretization of the Navier-Stokes equations is stable on any grid, and conserves the total mass, momentum and kinetic energy (when the physical dissipation is turned off). Its accuracy is tested for a turbulent channel flow at Re--5,600 (based on the channel width and the mean bulk velocity) by comparing the results to those of physical experiments and previous numerical studies. This comparison shows that with a fourth-order, symmetry-preserving method a 64 x 64 x 32 grid suffices to perform an accurate direct numerical simulation.
Author: Paul Durbin
Publisher: Elsevier
ISBN: 0128208902
Category : Technology & Engineering
Languages : en
Pages : 554
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Book Description
Advanced Approaches in Turbulence: Theory, Modeling, Simulation and Data Analysis for Turbulent Flows focuses on the updated theory, simulation and data analysis of turbulence dealing mainly with turbulence modeling instead of the physics of turbulence. Beginning with the basics of turbulence, the book discusses closure modeling, direct simulation, large eddy simulation and hybrid simulation. The book also covers the entire spectrum of turbulence models for both single-phase and multi-phase flows, as well as turbulence in compressible flow. Turbulence modeling is very extensive and continuously updated with new achievements and improvements of the models. Modern advances in computer speed offer the potential for elaborate numerical analysis of turbulent fluid flow while advances in instrumentation are creating large amounts of data. This book covers these topics in great detail. Covers the fundamentals of turbulence updated with recent developments Focuses on hybrid methods such as DES and wall-modeled LES Gives an updated treatment of numerical simulation and data analysis
Author: Oleg Mikhailovich Belotserkovskii
Publisher: World Scientific
ISBN: 9812833021
Category : Science
Languages : en
Pages : 489
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Book Description
The book provides an original approach in the research of structural analysis of free developed shear compressible turbulence at high Reynolds number on the base of direct numerical simulation (DNS) and instability evolution for ideal medium (integral conservation laws) with approximate mechanism of dissipation (FLUX dissipative monotone OC upwindOCO difference schemes) and does not use any explicit sub-grid approximation and semi-empirical models of turbulence. Convective mixing is considered as a principal part of conservation law.
Author: Institute for Computer Applications in Science and Engineering
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
Author: Tomás Chacón Rebollo
Publisher: Springer
ISBN: 1493904558
Category : Mathematics
Languages : en
Pages : 530
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Book Description
With applications to climate, technology, and industry, the modeling and numerical simulation of turbulent flows are rich with history and modern relevance. The complexity of the problems that arise in the study of turbulence requires tools from various scientific disciplines, including mathematics, physics, engineering and computer science. Authored by two experts in the area with a long history of collaboration, this monograph provides a current, detailed look at several turbulence models from both the theoretical and numerical perspectives. The k-epsilon, large-eddy simulation and other models are rigorously derived and their performance is analyzed using benchmark simulations for real-world turbulent flows. Mathematical and Numerical Foundations of Turbulence Models and Applications is an ideal reference for students in applied mathematics and engineering, as well as researchers in mathematical and numerical fluid dynamics. It is also a valuable resource for advanced graduate students in fluid dynamics, engineers, physical oceanographers, meteorologists and climatologists.
Author: Vincent Gregory Weirs
Publisher:
ISBN:
Category :
Languages : en
Pages : 318
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Book Description
