Turbulence Measurements In Axisymmetric Jets Of Air And Helium
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Turbulence Measurements In Axisymmetric Jets Of Air And Helium
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Author : N. R. Panchapakesan
language : en
Publisher:
Release Date : 1991
Turbulence Measurements In Axisymmetric Jets Of Air And Helium written by N. R. Panchapakesan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
A turbulent round jet of air discharging into quiescent air was studied experimentally. X-wire hot-wire probes mounted on a moving shuttle were used to eliminate rectification errors due to flow reversals in the intermittent region of the jet. Moments of velocity fluctuatuions up to fourth order were measured to characterize turbulent transport in the jet and to evaluate current models for triple moments that occur in the Reynolds stress equations. Fourth moments were very well described in terms of second moments by the quasi-gaussian approximation across the entire jet including the intermittent region. Profiles of third moments were found to be significantly different from earlier measurements. The Basic triple moment model that inlcluded turbulent production and models for the dissipations and the return to isotropy part of the pressure correlations was found to be unsatisfactory. When mean-strain production and a model for rapid pressure correlations were also included, predictions were satisfactory in the fully turbulent region.
Springer Handbook Of Experimental Fluid Mechanics
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Author : Cameron Tropea
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-10-09
Springer Handbook Of Experimental Fluid Mechanics written by Cameron Tropea 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 2007-10-09 with Science categories.
Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.
An Experimental Investigation Of Gas Jets In Confined Swirling Air Flow
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Author : Ronald M. C. So
language : en
Publisher:
Release Date : 1984
An Experimental Investigation Of Gas Jets In Confined Swirling Air Flow written by Ronald M. C. So and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Combustion engineering 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.
Variable Density Fluid Turbulence
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Author : P. Chassaing
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Variable Density Fluid Turbulence written by P. Chassaing 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 2013-06-29 with Science categories.
The first part aims at providing the physical and theoretical framework of the analysis of density variations in fully turbulent flows. Its scope is deliberately educational. In the second part, basic data on dynamical and scalar properties of variable density turbulent flows are presented and discussed, based on experimental data and/or results from direct numerical simulations. This part is rather concerned with a research audience. The last part is more directly devoted to an engineering audience and deals with prediction methods for turbulent flows of variable density fluid. Both first and second order, single point modeling are discussed, with special emphasis on the capability to include specific variable density / compressibility effects.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1979
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Mechanics, Applied categories.
An Experimental Investigation Of Gas Jets In Confined Swirling Air Flow
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Author : Ronald M. C. So
language : en
Publisher:
Release Date : 1984
An Experimental Investigation Of Gas Jets In Confined Swirling Air Flow written by Ronald M. C. So and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Combustion engineering categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Modeling And Simulation Of Turbulent Flows
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Author : Roland Schiestel
language : en
Publisher: John Wiley & Sons
Release Date : 2010-01-05
Modeling And Simulation Of Turbulent Flows written by Roland Schiestel and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-05 with Science categories.
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.
Advanced Topics In Mass Transfer
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Author : Mohamed El-Amin
language : en
Publisher: BoD – Books on Demand
Release Date : 2011-02-21
Advanced Topics In Mass Transfer written by Mohamed El-Amin and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-21 with Science categories.
This book introduces a number of selected advanced topics in mass transfer phenomenon and covers its theoretical, numerical, modeling and experimental aspects. The 26 chapters of this book are divided into five parts. The first is devoted to the study of some problems of mass transfer in microchannels, turbulence, waves and plasma, while chapters regarding mass transfer with hydro-, magnetohydro- and electro- dynamics are collected in the second part. The third part deals with mass transfer in food, such as rice, cheese, fruits and vegetables, and the fourth focuses on mass transfer in some large-scale applications such as geomorphologic studies. The last part introduces several issues of combined heat and mass transfer phenomena. The book can be considered as a rich reference for researchers and engineers working in the field of mass transfer and its related topics.