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Author : S. W. Kim
Publisher : Unknown
Page : 34 pages
File Size : 52,6 Mb
Release : 1988
Category : Fluid mechanics
ISBN : NASA:31769000584295
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 32 pages
File Size : 44,5 Mb
Release : 2018-06-28
Category : Electronic
ISBN : 1722009624
A near wall turbulence model and its incorporation into a multiple-time-scale turbulence model are presented. In the method, the conservation of mass, momentum, and the turbulent kinetic energy equations are integrated up to the wall; and the energy transfer rate and the dissipation rate inside the near wall layer are obtained from algebraic equations. The algebraic equations for the energy transfer rate and the dissipation rate inside the near wall layer were obtained from a k-equation turbulence model and the near wall analysis. A fully developed turbulent channel flow and fully developed turbulent pipe flows were solved using a finite element method to test the predictive capability of the turbulence model. The computational results compared favorably with experimental data. It is also shown that the present turbulence model could resolve the over shoot phenomena of the turbulent kinetic energy and the dissipation rate in the region very close to the wall. Kim, S.-W. Glenn Research Center NASA ORDER C-99066-G; RTOP 505-62-20...
Author : S.-W. Kim
Publisher : Unknown
Page : 30 pages
File Size : 45,6 Mb
Release : 1989
Category : Electronic
ISBN : UIUC:30112059173812
Author : S. W. Kim
Publisher : Unknown
Page : 34 pages
File Size : 51,6 Mb
Release : 1988
Category : Fluid mechanics
ISBN : UIUC:30112059173754
Author : Roland Schiestel
Publisher : John Wiley & Sons
Page : 751 pages
File Size : 49,6 Mb
Release : 2010-01-05
Category : Science
ISBN : 9780470393468
This title provides the fundamental bases for developing turbulence models on rational grounds. The main different methods of approach are considered, ranging from statistical modelling at various degrees of complexity to numerical simulations of turbulence. Each of these various methods has its own specific performances and limitations, which appear to be complementary rather than competitive. After a discussion of the basic concepts, mathematical tools and methods for closure, the book considers second order closure models. Emphasis is placed upon this approach because it embodies potentials for clarifying numerous problems in turbulent shear flows. Simpler, generally older models are then presented as simplified versions of the more general second order models. The influence of extra physical parameters is also considered. Finally, the book concludes by examining large Eddy numerical simulations methods. Given the book’s comprehensive coverage, those involved in the theoretical or practical study of turbulence problems in fluids will find this a useful and informative read.
Author : W. Minkowycz
Publisher : CRC Press
Page : 456 pages
File Size : 50,5 Mb
Release : 1996-11-01
Category : Science
ISBN : 1560324414
This is the first volume in the series. It analyzes several fundamental methodology issues in numerical heat transfer and fluid flow and identifies certain areas of active application. The finite-volume approach is presented with the finite-element methods as well as with energy balance analysis. Applications include the latest development in turbulence modeling and current approaches to inverse problems.
Author : Anonim
Publisher : Unknown
Page : 692 pages
File Size : 42,8 Mb
Release : 1995
Category : Aeronautics
ISBN : MINN:30000006324630
Author : Anonim
Publisher : Unknown
Page : 1644 pages
File Size : 50,5 Mb
Release : 1991
Category : Government publications
ISBN : UIUC:30112063914466
Author : Anonim
Publisher : Unknown
Page : 1200 pages
File Size : 55,5 Mb
Release : 2024-06-23
Category : Government publications
ISBN : WISC:89117117499
Author : Anonim
Publisher : Unknown
Page : 400 pages
File Size : 53,5 Mb
Release : 1948
Category : Mechanics, Applied
ISBN : OSU:32435026160655
Author : Michele Ciofalo
Publisher : Springer Nature
Page : 194 pages
File Size : 41,5 Mb
Release : 2021-08-16
Category : Technology & Engineering
ISBN : 9783030810788
The book provides the theoretical fundamentals on turbulence and a complete overview of turbulence models, from the simplest to the most advanced ones including Direct and Large Eddy Simulation. It mainly focuses on problems of modeling and computation, and provides information regarding the theory of dynamical systems and their bifurcations. It also examines turbulence aspects which are not treated in most existing books on this subject, such as turbulence in free and mixed convection, transient turbulence and transition to turbulence. The book adopts the tensor notation, which is the most appropriate to deal with intrinsically tensor quantities such as stresses and strain rates, and for those who are not familiar with it an Appendix on tensor algebra and tensor notation are provided.
Author : Michel Stanislas,Javier Jimenez,Ivan Marusic
Publisher : Springer Science & Business Media
Page : 462 pages
File Size : 51,9 Mb
Release : 2010-10-26
Category : Technology & Engineering
ISBN : 9789048196036
This book will consist of a coherent collection of recent results on near wall turbulence including theory, new experiments, DNS, and modeling with RANS, LES and Low Order Dynamical Systems.
Author : Jean Piquet
Publisher : Springer Science & Business Media
Page : 767 pages
File Size : 50,9 Mb
Release : 2013-04-17
Category : Technology & Engineering
ISBN : 9783662035597
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.
Author : S.-W. Kim
Publisher : Unknown
Page : 284 pages
File Size : 46,8 Mb
Release : 1989
Category : Electronic
ISBN : NASA:31769000588296
Author : S. W. Kim
Publisher : Unknown
Page : 44 pages
File Size : 55,5 Mb
Release : 1989
Category : Fluid mechanics
ISBN : NASA:31769000588361