Reynolds Stress Modeling Of Turbulent Open Channel Flows
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Author | : Sung-Uk Choi |
Publisher | : |
Total Pages | : 116 |
Release | : 2009 |
Genre | : Mathematics |
ISBN | : |
This book presents numerical simulations of three-dimensional turbulent open-channel flows. In the simulations, Reynolds-averaged Navier-Stokes equations are solved with the Reynolds stress model for turbulence closure. The overall solution strategy is the SIMPLER algorithm, and the power-law scheme is used to discretise the convection and diffusion terms in the governing equations. The Reynolds stress model is applied to rectangular open-channel flows, partly-vegetated open-channel flows, and compound open-channel flows. The simulated mean flow and turbulence structures including streamwise mean velocity, secondary currents, turbulence intensity, and Reynolds stress, are provided and compared with measure data in the literature. As shown in this book, these comparisons reveal that the proposed Reynolds stress model successfully predicts the mean flow and turbulence statistics of turbulent open-channel flows.
Author | : Hiroji Nakagawa |
Publisher | : Routledge |
Total Pages | : 246 |
Release | : 2017-10-02 |
Genre | : Technology & Engineering |
ISBN | : 1351406604 |
A review of open channel turbulence, focusing especially on certain features stemming from the presence of the free surface and the bed of a river. Part one presents the statistical theory of turbulence; Part two addresses the coherent structures in open-channel flows and boundary layers.
Author | : Kemal Hanjalić |
Publisher | : Cambridge University Press |
Total Pages | : 403 |
Release | : 2011-10-20 |
Genre | : Science |
ISBN | : 0521845750 |
A comprehensive account of advanced RANS turbulence models including numerous applications to complex flows in engineering and the environment.
Author | : Jean Piquet |
Publisher | : Springer Science & Business Media |
Total Pages | : 767 |
Release | : 2013-04-17 |
Genre | : Technology & Engineering |
ISBN | : 3662035596 |
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 | : Hisashi Ninokata |
Publisher | : World Scientific |
Total Pages | : 888 |
Release | : 2002 |
Genre | : Technology & Engineering |
ISBN | : 9810249314 |
This book is an essential reference for engineers and scientists working in the field of turbulence. It covers a variety of applications, such as: turbulence measurements; mathematical and numerical modeling of turbulence; thermal hydraulics; applications for civil, mechanical and nuclear engineering; environmental fluid mechanics; river and open channel flows; coastal problems; ground water.
Author | : Wolfgang Rodi |
Publisher | : CRC Press |
Total Pages | : 124 |
Release | : 1993-01-01 |
Genre | : Technology & Engineering |
ISBN | : 9789054101505 |
This book provides an introduction to the subject of turbulence modelling in a form easy to understand for anybody with a basic background in fluid mechanics, and it summarizes the present state of the art. Individual models are described and examined for the merits and demerits which range from the simple Prandtl mixing length theory to complex second order closure schemes.
Author | : 洪晨晏 |
Publisher | : |
Total Pages | : |
Release | : 2021 |
Genre | : |
ISBN | : |
Author | : Fabian Lopez |
Publisher | : |
Total Pages | : 128 |
Release | : 1997 |
Genre | : Channels (Hydraulic engineering) |
ISBN | : |
Author | : Nobu Mori |
Publisher | : World Scientific |
Total Pages | : 888 |
Release | : 2002-07-19 |
Genre | : Technology & Engineering |
ISBN | : 9814488720 |
This book is an essential reference for engineers and scientists working in the field of turbulence. It covers a variety of applications, such as: turbulence measurements; mathematical and numerical modeling of turbulence; thermal hydraulics; applications for civil, mechanical and nuclear engineering; environmental fluid mechanics; river and open channel flows; coastal problems; ground water.
Author | : Peter S. Bernard |
Publisher | : John Wiley & Sons |
Total Pages | : 516 |
Release | : 2002-08-19 |
Genre | : Technology & Engineering |
ISBN | : 9780471332190 |
Provides unique coverage of the prediction and experimentation necessary for making predictions. * Covers computational fluid dynamics and its relationship to direct numerical simulation used throughout the industry. * Covers vortex methods developed to calculate and evaluate turbulent flows. * Includes chapters on the state-of-the-art applications of research such as control of turbulence.