A Reynolds Stress Equation Turbulence Model for Compressible Flows PDF Download
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Author: Marianna Gnedin
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Marianna Gnedin
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Sung-Uk Choi
Publisher:
ISBN:
Category : Mathematics
Languages : en
Pages : 116
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Book Description
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: Joseph H. Morrison
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 54
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Author: Joseph Hicks Morrison
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 48
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Author: S. Sarkar
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages : 36
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Author: M. W. Rubesin
Publisher:
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Category :
Languages : en
Pages : 46
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Author: Institute for Computer Applications in Science and Engineering
Publisher:
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Category :
Languages : en
Pages : 44
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Author: Joseph G. Marvin
Publisher:
ISBN:
Category :
Languages : en
Pages : 132
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Author: Morris W. Rubesin
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 38
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Book Description
Author: Jean Piquet
Publisher: Springer Science & Business Media
ISBN: 3662035596
Category : Technology & Engineering
Languages : en
Pages : 767
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Book Description
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.
