Turbulence and Turbulent Transport in Sediment-laden Open-channel Flows PDF Download

Author: Dennis Anthony Lyn
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 244

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Author: Clemens Chan-Braun
Publisher: KIT Scientific Publishing
ISBN: 3866449003
Category : Technology & Engineering
Languages : en
Pages : 190

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Book Description
This thesis aims to contribute to a better understanding of turbulent open channel flow, sediment erosion and sediment transport. The thesis provides an analysis of high-fidelity data from direct numerical simulation of (i) open channel flow over an array of fixed spheres, (ii) open channel flow with mobile eroding spheres, (iii) open channel flow with sediment transport of many mobile spheres. An immersed boundary method is used to resolve the finite-size particles.

Author: Roberto Gaudio
Publisher: MDPI
ISBN: 3039438999
Category : Science
Languages : en
Pages : 192

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Book Description
The main focus of this Special Issue of Water is the state-of-the-art and recent research on turbulence and flow–sediment interactions in open-channel flows. Our knowledge of river hydraulics is deepening, thanks to both laboratory/field experiments related to the characteristics of turbulence and their link to erosion, transport, deposition, and local scouring phenomena. Collaboration among engineers, physicists, and other experts is increasing and furnishing new inter-/multidisciplinary perspectives to the research of river hydraulics and fluid mechanics. At the same time, the development of both sophisticated laboratory instrumentation and computing skills is giving rise to excellent experimental–numerical comparative studies. Thus, this Special Issue, with ten papers by researchers from many institutions around the world, aims at offering a modern panoramic view on all the above aspects to the vast audience of river researchers.

Author: Fabian Lopez
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 128

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Book Description

Author: Hiroji Nakagawa
Publisher: Routledge
ISBN: 1351406604
Category : Technology & Engineering
Languages : en
Pages : 246

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Book Description
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: Clemens Chan-Braun
Publisher:
ISBN:
Category : Erosion
Languages : en
Pages : 0

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Book Description

Author: B. S. Mazumder
Publisher: CRC Press
ISBN: 1000878066
Category : Technology & Engineering
Languages : en
Pages : 861

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Book Description
This book covers fluid dynamics and fluvial processes, including basics applicable to open channel flow followed by turbulence characteristics related to sediment-laden flows. It presents well-balanced exposure of physical concepts, mathematical treatments, validation of the models/theories, and experimentations using modern electronic gadgets within the scope. In addition, it explores fluid motions, sediment-fluid interactions, erosion and scouring, sediment suspension and bed load transportation, image processing for particle dynamics, and various problems of applied fluid mechanics in natural sciences. Features: Gives comprehensive treatment on fluid dynamics and fluvial process from fundamentals to advanced level applications in one volume. Presents knowledge on sediment transport and its interaction with turbulence. Covers recent methodologies in the study of turbulent flow theories with verification of laboratory data collected by ADV, PIV, URS, LDA, and imaging techniques, and field data collected by MMB and S4 current meters. Explores the latest empirical formulae for the estimations of bed load, saltation, suspension, and bedform migration. Contains theory to experimentations with field practices with comprehensive explanations and illustrations. This book is aimed at senior undergraduates, engineering and applied science postgraduate and research students working in mechanical, civil, geo-sciences, and chemical engineering departments pertaining to fluid mechanics, hydraulics, sediment transportation, and turbulent flows.

Author: B Mutlu Sumer
Publisher: World Scientific
ISBN: 9813234326
Category : Technology & Engineering
Languages : en
Pages : 758

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Book Description
This book discusses the subject of turbulence encountered in coastal and civil engineering.The primary aim of the book is to describe turbulence processes including transition to turbulence; mean and fluctuating flows in channels/pipes, and in currents; wave boundary layers (including boundary layers under solitary waves); streaming processes in wave boundary layers; turbulence processes in breaking waves including breaking solitary waves; turbulence processes such as bursting process and their implications for sediment transport; flow resistance in steady and wave boundary layers; and turbulent diffusion and dispersion processes in the coastal and river environment, including sediment transport due to diffusion/dispersion.Both phenomenological and statistical theories are described in great detail. Turbulence modelling is also described, and several examples for modelling of turbulence in steady flow and wave boundary layers are presented.The book ends with a chapter containing hands-on exercises on a wide variety of turbulent flows including experimental study of turbulence in an open-channel flow, using Laser Doppler Anemometry; Statistical, correlation and spectral analysis of turbulent air jet flow; Turbulence modelling of wave boundary layer flows; and numerical modelling of dispersion in a turbulent boundary layer, a set of exercises used by the authors in their Masters classes over many years.Although the book is essentially intended for professionals and researchers in the area of Coastal and Civil Engineering, and as a text book for graduate/post graduate students, the contents of the book will, however, additionally provide sufficient background in the study of turbulent flows relevant to many other disciplines, such as Wind Engineering, Mechanical Engineering, and Environmental Engineering.

Author: N. J. Clifford
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 386

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Book Description
Turbulence: Perspectives on Flow and Sediment Transport outlines the fundamental principles of the measurement and analysis of turbulent flow and sediment transport. It reviews laboratory work over the last three decades on near-boundary flow structure, as well as providing more recent research dealing with the high frequency monitoring and modelling of sediment transport. The research sections address aspects of turbulence characteristics and sediment behaviour in fluvial, tidal and aeolian boundary layers. Throughout, emphasis is upon the practicalities of measurement and modelling under field conditions. The effects of roughness transitions are extensively discussed and some of the most popular instrumentation is reviewed. This book brings together contributions from twenty researchers worldwide from many disciplines connected with earth sciences, engineering and fluid dynamics, providing both review material and some of the latest research into the small-scale interactions of turbulence and sediment transport in geophysical boundary layers. The book is ideally suited to a wide audience, from advanced undergraduate level onwards.

Author: Krayer, Michael Werner Tobias
Publisher: KIT Scientific Publishing
ISBN: 3731513102
Category :
Languages : en
Pages : 290

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Book Description
The transport of bacteria in turbulent river-like environments is addressed, where bacterial populations are frequently encountered attached to solids. This transport mode is investigated by studying the transient settling of heavy particles in turbulent channel flows featuring sediment beds. A numerical method is used to fully resolve turbulence and finite-size particles, which enables the assessment of the complex interplay between flow structures, suspended solids and river sediment.