Size Dynamics And Consequences Of Large Scale Horizontal Coherent Structures In Open Channel Flows

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Size, Dynamics and Consequences of Large-scale Horizontal Coherent Structures in Open-channel Flows

Author : Habib Ahmari
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (862 download)

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Book Synopsis Size, Dynamics and Consequences of Large-scale Horizontal Coherent Structures in Open-channel Flows by : Habib Ahmari

Download or read book Size, Dynamics and Consequences of Large-scale Horizontal Coherent Structures in Open-channel Flows written by Habib Ahmari and published by . This book was released on 2013 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis concerns the occurrence of the large-scale bed and plan forms known as alternate bars and meandering, and the internal structures of the flow associated with their formation. The work is to be viewed as an extension of previous work by da Silva (1991), Yalin (1992), and Yalin and da Silva (2001). As a first step in this work, the criteria for occurrence of alternate bars and meandering of Yalin and da Silva (2001) is re-considered in view of additional field and laboratory data from the recent literature and data resulting from two series of experimental runs carried out in two sediment transport flumes. This leads to a number of modifications of the boundary-lines in the related existence-region diagram of Yalin and da Silva. The size of the largest horizontal coherent structures (HCS's) of an alternate bar inducing flow was then investigated experimentally on the basis of three series of flow velocity measurements. These were carried out in a 21m-long, 1m-wide straight channel, conveying a 4cm-deep flow. The bed consisted of a silica sand having a grain size of 2mm; its surface was flat. The measurements were carried out using a Sontek 2D Micro ADV. The horizontal burst length was found to be between five and seven times the flow width. The effect of the HCS's on the mean flow was also investigated. A slight internal meandering of the flow caused by the superimposition of burst-sequences on the mean flow was clearly detectable. Finally, with the aid of three new series of measurements in the same channel, an attempt was made to penetrate the dynamics and life-cycle of the HCS's. For this purpose, quadrant analysis was used; the cross-sectional distribution of relevant statistical turbulence-related parameters was investigated; and cross-correlations of flow velocity along the flow depth and across the channel were performed. The analysis indicates that the HCS's originate near the channel banks, with the location of ejections and sweeps being anti-symmetrically arranged with regard to the channel centreline, and then evolve so as to occupy the entire depth of the water and the entire width of the channel.

Large-Scale Simulation

Author : Dan Chen
Publisher : CRC Press
ISBN 13 : 0415670454
Total Pages : 452 pages
Book Rating : 4.4/5 (156 download)

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Book Synopsis Large-Scale Simulation by : Dan Chen

Download or read book Large-Scale Simulation written by Dan Chen and published by CRC Press. This book was released on 2012-05-29 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-Scale Simulation: Models, Algorithms, and Applications gives you firsthand insight on the latest advances in large-scale simulation techniques. Most of the research results are drawn from the authors’ papers in top-tier, peer-reviewed, scientific conference proceedings and journals. The first part of the book presents the fundamentals of large-scale simulation, including high-level architecture and runtime infrastructure. The second part covers middleware and software architecture for large-scale simulations, such as decoupled federate architecture, fault tolerant mechanisms, grid-enabled simulation, and federation communities. In the third part, the authors explore mechanisms—such as simulation cloning methods and algorithms—that support quick evaluation of alternative scenarios. The final part describes how distributed computing technologies and many-core architecture are used to study social phenomena. Reflecting the latest research in the field, this book guides you in using and further researching advanced models and algorithms for large-scale distributed simulation. These simulation tools will help you gain insight into large-scale systems across many disciplines.

LARGE-SCALE HORIZONTAL COHERENT STRUCTURES IN A DEEP OPEN CHANNEL FLOW

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis LARGE-SCALE HORIZONTAL COHERENT STRUCTURES IN A DEEP OPEN CHANNEL FLOW by :

Download or read book LARGE-SCALE HORIZONTAL COHERENT STRUCTURES IN A DEEP OPEN CHANNEL FLOW written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Free Surface Flows and Transport Processes

Author : Monika B. Kalinowska
Publisher : Springer
ISBN 13 : 3319709143
Total Pages : 505 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Free Surface Flows and Transport Processes by : Monika B. Kalinowska

Download or read book Free Surface Flows and Transport Processes written by Monika B. Kalinowska and published by Springer. This book was released on 2018-01-28 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the written, thoroughly reviewed versions of both invited lectures and regular presentations given at the 36th International School of Hydraulics, held at Jachranka in Poland on May 23–26, 2017. The contributions cover recent findings in the areas of mathematical modeling as well as experimental investigations related to free surface flows and pollution, sediment and heat transport processes in rivers. Better understanding of environmental flows requires cognition of physical, chemical and biological attributes of flowing water and therefore hydraulic research becomes strongly interdisciplinary field of science. The authors also realize that fundamental knowledge of environmental hydraulics problems is absolutely essential for planning and design of systems to manage water resources. Nowadays the readers face a rapid development of hydraulic research due to a boom in the computer sciences and measurement techniques and this is what this book is about. Eminent world leading experts in this field and young researchers from sixteen countries from all over the world contributed to this book.

River Dynamics

Author : Bruce L. Rhoads
Publisher : Cambridge University Press
ISBN 13 : 1108173780
Total Pages : 544 pages
Book Rating : 4.1/5 (81 download)

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Book Synopsis River Dynamics by : Bruce L. Rhoads

Download or read book River Dynamics written by Bruce L. Rhoads and published by Cambridge University Press. This book was released on 2020-04-29 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers are important agents of change that shape the Earth's surface and evolve through time in response to fluctuations in climate and other environmental conditions. They are fundamental in landscape development, and essential for water supply, irrigation, and transportation. This book provides a comprehensive overview of the geomorphological processes that shape rivers and that produce change in the form of rivers. It explores how the dynamics of rivers are being affected by anthropogenic change, including climate change, dam construction, and modification of rivers for flood control and land drainage. It discusses how concern about environmental degradation of rivers has led to the emergence of management strategies to restore and naturalize these systems, and how river management techniques work best when coordinated with the natural dynamics of rivers. This textbook provides an excellent resource for students, researchers, and professionals in fluvial geomorphology, hydrology, river science, and environmental policy.

Fluvial Processes

Author : Ana Maria Ferreira da Silva
Publisher : CRC Press
ISBN 13 : 1351796267
Total Pages : 266 pages
Book Rating : 4.3/5 (517 download)

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Book Synopsis Fluvial Processes by : Ana Maria Ferreira da Silva

Download or read book Fluvial Processes written by Ana Maria Ferreira da Silva and published by CRC Press. This book was released on 2017-09-20 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: A stream flowing in alluvium deforms its bed surface, forming ripples, dunes, bars, etc., and, in many instances, it deforms its channel entirely, thereby creating meandering or braiding patterns. It could be said that, in general, an alluvial stream and its deformable boundary undergo a variety of fluvial processes leading to the emergence of a multitude of alluvial forms. This book concerns the physics and analytical treatment of various fluvial processes and the associated alluvial bed and plan forms listed above. Following an introductory chapter on the basics of turbulent flow and sediment transport, the book covers the origin, geometric characteristics and effects of bed forms, from small- to meso-scale (ripples, dunes, alternate and multiple bars); the initiation, geometry and mechanics of meandering streams; the computation of flow, bed deformation and the planimetric evolution of meandering streams; and braiding and delta formation. The book also covers the regime concept, the time-development of a stream towards its regime state, and the formulation of stable, or equilibrium, morphology. The book distinguishes itself by its comprehensive analysis and discussion of key processes involved in large-scale river morphodynamics. The book was written primarily for researchers and graduate students of hydraulic engineering, water resources and related branches of earth sciences, but it will also prove useful for river engineers and managers.

Coherent Flow Structures in Open Channels

Author : Phil Ashworth
Publisher :
ISBN 13 :
Total Pages : 784 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Coherent Flow Structures in Open Channels by : Phil Ashworth

Download or read book Coherent Flow Structures in Open Channels written by Phil Ashworth and published by . This book was released on 1996-05-06 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent Flow Structures in Open Channels presents the first integrated treatment, across a wide range of spatial and temporal scales, of the origins and characteristics of coherent fluid motions and their influence on sediment transport and bed morphology. This book contains contributions from an international and interdisciplinary authorship who are responsible for many of the recent advances in geophysical boundary layer research. Coherent flow structures are examined systematically across a range of scales from flat-bed boundary layers, grain and bedform roughness generated structures through to the largest scales, where structures may be associated with bars, meander bends and channel confluences. The book is broadly organized according to the spatial scales of coherent flow structures and presents a treatise on the study of these motions from theoretical, experimental and field-based approaches. These papers describe the origins, evolution and characteristics of coherent flow structures and the control which they may impart on sediment transport, both as a bed and suspended load, and ultimately on channel morphology. The book also highlights future research themes required to advance the interdisciplinary understanding of these complex, yet ubiquitous, natural flows. The research presented here will find applications within many fields, including geomorphology, sedimentology, the physical and numerical modelling of two-phase flows, environmental fluid and sediment dynamics and river engineering.

Intermittency and Self-Organisation in Turbulence and Statistical Mechanics

Author : Eun-jin Kim
Publisher : MDPI
ISBN 13 : 3039211080
Total Pages : 300 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Intermittency and Self-Organisation in Turbulence and Statistical Mechanics by : Eun-jin Kim

Download or read book Intermittency and Self-Organisation in Turbulence and Statistical Mechanics written by Eun-jin Kim and published by MDPI. This book was released on 2019-07-29 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Intermittency and Self-Organisation in Turbulence and Statistical Mechanics that was published in Entropy

Sediment Transport Dynamics

Author : Weiming Wu
Publisher : CRC Press
ISBN 13 : 1000936740
Total Pages : 669 pages
Book Rating : 4.0/5 (9 download)

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Book Synopsis Sediment Transport Dynamics by : Weiming Wu

Download or read book Sediment Transport Dynamics written by Weiming Wu and published by CRC Press. This book was released on 2023-11-21 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamentals of sediment transport in surface waters. It covers sediment properties, open channel flows, sediment particle settling, incipient motion, bed forms, bed load, suspended load, total load, cohesive sediments, water-sediment two-phase flows, hyperconcentrated flows, debris flows, wave-induced sediment transport, turbidity currents, and physical modeling. Besides the primary context of river sedimentation, this book extensively covers sediment transport under coexisting waves and currents in coasts and estuaries, hyperconcentrated and debris flows in rivers, as well as turbidity currents in lakes, reservoirs, channels, and the ocean. It includes a chapter on the water-sediment two-phase flow theory, which is considered the basis of many sediment transport models. It introduces some special topics have that emerged in recent years, such as the transport of mixed cohesive and noncohesive sediments, biofilm-coated sediments, and infiltrated sand within gravel and cobble beds. The text merges classical and new knowledge of sediment transport from various sources in English and non-English literature and includes important contributions made by many scientists and engineers from all over the world. It balances the breadth, depth, fundamental importance, practical applicability, and future advancement of the covered knowledge, and can be used as a text and reference book. The chapters are arranged in a useful sequence for teaching purposes. Certain homework problems are prepared, which also highlight the important topics for instructors to select. Solutions to homework problems are available from the author by request.

River Flow 2016

Author : George Constantinescu
Publisher : CRC Press
ISBN 13 : 1315644479
Total Pages : 2434 pages
Book Rating : 4.3/5 (156 download)

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Book Synopsis River Flow 2016 by : George Constantinescu

Download or read book River Flow 2016 written by George Constantinescu and published by CRC Press. This book was released on 2016-06-22 with total page 2434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding and being able to predict fluvial processes is one of the biggest challenges for hydraulics and environmental engineers, hydrologists and other scientists interested in preserving and restoring the diverse functions of rivers. The interactions among flow, turbulence, vegetation, macroinvertebrates and other organisms, as well as the transport and retention of particulate matter, have important consequences on the ecological health of rivers. Managing rivers in an ecologically friendly way is a major component of sustainable engineering design, maintenance and restoration of ecological habitats. To address these challenges, a major focus of River Flow 2016 was to highlight the latest advances in experimental, computational and theoretical approaches that can be used to deepen our understanding and capacity to predict flow and the associated fluid-driven ecological processes, anthropogenic influences, sediment transport and morphodynamic processes. River Flow 2016 was organized under the auspices of the Committee for Fluvial Hydraulics of the International Association for Hydro-Environment Engineering and Research (IAHR). Since its first edition in 2002, the River Flow conference series has become the main international event focusing on river hydrodynamics, sediment transport, river engineering and restoration. Some of the highlights of the 8th International Conference on Fluvial Hydraulics were to focus on inter-disciplinary research involving, among others, ecological and biological aspects relevant to river flows and processes and to emphasize broader themes dealing with river sustainability. River Flow 2016 (extended abstract book 854 pages + full paper CD-ROM 2436 pages) contains the contributions presented during the regular sessions covering the main conference themes and the special sessions focusing on specific hot topics of river flow research, and will be of interest to academics interested in hydraulics, hydrology and environmental engineering.

Informatics, Networking and Intelligent Computing

Author : Jiaxing Zhang
Publisher : CRC Press
ISBN 13 : 1138026743
Total Pages : 2590 pages
Book Rating : 4.1/5 (38 download)

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Book Synopsis Informatics, Networking and Intelligent Computing by : Jiaxing Zhang

Download or read book Informatics, Networking and Intelligent Computing written by Jiaxing Zhang and published by CRC Press. This book was released on 2015-05-06 with total page 2590 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains selected papers presented at the 2014 International Conference on Informatics, Networking and Intelligent Computing, held in Shenzhen, China. Contributions cover the latest developments and advances in the field of Informatics, Networking and Intelligent Computing.

Turbulent coherent structures, Secondary currents and Sediment ridges

Author : Scherer, Markus Maximilian
Publisher : KIT Scientific Publishing
ISBN 13 : 3731513188
Total Pages : 348 pages
Book Rating : 4.7/5 (315 download)

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Book Synopsis Turbulent coherent structures, Secondary currents and Sediment ridges by : Scherer, Markus Maximilian

Download or read book Turbulent coherent structures, Secondary currents and Sediment ridges written by Scherer, Markus Maximilian and published by KIT Scientific Publishing. This book was released on 2024-06-19 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origin of secondary currents and subaqueous sediment patterns in natural rivers is analysed from first principles. For this purpose, simulations of sediment transport in canonical turbulent open channel flows are performed using a numerical technique that resolves all relevant flow scales and the dynamics of the individual sand grains. The high-fidelity datasets reveal the fundamental importance of individual coherent structures for the development of sediment patterns and secondary flows.

Turbulence in Open Channel Flows

Author : Hiroji Nakagawa
Publisher : Routledge
ISBN 13 : 1351406604
Total Pages : 246 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Turbulence in Open Channel Flows by : Hiroji Nakagawa

Download or read book Turbulence in Open Channel Flows written by Hiroji Nakagawa and published by Routledge. This book was released on 2017-10-02 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Shallow Flows

Author : Gerhard H. Jirka
Publisher : CRC Press
ISBN 13 : 9780203027325
Total Pages : 692 pages
Book Rating : 4.0/5 (273 download)

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Book Synopsis Shallow Flows by : Gerhard H. Jirka

Download or read book Shallow Flows written by Gerhard H. Jirka and published by CRC Press. This book was released on 2004-09-15 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the key findings of the International Symposium held in Delft in 2003, which explored the process of shallow flows. Shallow flows are found in lowland rivers, lakes, estuaries, bays, coastal areas and in density-stratified atmospheres, and may be observed in puddles, as in oceans. They impact on the life and work of a w

Handbook of Environmental Fluid Dynamics, Two-Volume Set

Author : Harindra Joseph Fernando
Publisher : CRC Press
ISBN 13 : 1466591145
Total Pages : 1197 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Handbook of Environmental Fluid Dynamics, Two-Volume Set by : Harindra Joseph Fernando

Download or read book Handbook of Environmental Fluid Dynamics, Two-Volume Set written by Harindra Joseph Fernando and published by CRC Press. This book was released on 2012-12-11 with total page 1197 pages. Available in PDF, EPUB and Kindle. Book excerpt: With major implications for applied physics, engineering, and the natural and social sciences, the rapidly growing area of environmental fluid dynamics focuses on the interactions of human activities, environment, and fluid motion. A landmark for the field, this two-volume handbook presents the basic principles, fundamental flow processes, modeling techniques, and measurement methods used in the field, along with critical discussions of environmental sustainability related to engineering aspects. The first volume provides a comprehensive overview of the fundamentals, and the second volume explores the interactions between engineered structures and natural flows.

Handbook of Environmental Fluid Dynamics, Volume One

Author : Harindra Joseph Fernando
Publisher : CRC Press
ISBN 13 : 1439816697
Total Pages : 638 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Handbook of Environmental Fluid Dynamics, Volume One by : Harindra Joseph Fernando

Download or read book Handbook of Environmental Fluid Dynamics, Volume One written by Harindra Joseph Fernando and published by CRC Press. This book was released on 2012-12-12 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: With major implications for applied physics, engineering, and the natural and social sciences, the rapidly growing area of environmental fluid dynamics focuses on the interactions of human activities, environment, and fluid motion. A landmark for the field, the two-volume Handbook of Environmental Fluid Dynamics presents the basic principles, fundamental flow processes, modeling techniques, and measurement methods used in the study of environmental motions. It also offers critical discussions of environmental sustainability related to engineering. The handbook features 81 chapters written by 135 renowned researchers from around the world. Covering environmental, policy, biological, and chemical aspects, it tackles important cross-disciplinary topics such as sustainability, ecology, pollution, micrometeorology, and limnology. Volume One: Overview and Fundamentals provides a comprehensive overview of the basic principles. It starts with general topics that emphasize the relevance of environmental fluid dynamics research in society, public policy, infrastructure, quality of life, security, and the law. It then discusses established and emerging focus areas. The volume also examines the sub-mesoscale flow processes and phenomena that form the building blocks of environmental motions, with emphasis on turbulent motions and their role in heat, momentum, and species transport. As communities face existential challenges posed by climate change, rapid urbanization, and scarcity of water and energy, the study of environmental fluid dynamics becomes increasingly relevant. This volume is a valuable resource for students, researchers, and policymakers working to better understand the fundamentals of environmental motions and how they affect and are influenced by anthropogenic activities. See also Handbook of Environmental Fluid Dynamics, Two-Volume Set and Volume Two: Systems, Pollution, Modeling, and Measurements.

River, Coastal and Estuarine Morphodynamics: RCEM 2007, Two Volume Set

Author : C. Marjolein Dohmen-Janssen
Publisher : CRC Press
ISBN 13 : 1439856567
Total Pages : 1271 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis River, Coastal and Estuarine Morphodynamics: RCEM 2007, Two Volume Set by : C. Marjolein Dohmen-Janssen

Download or read book River, Coastal and Estuarine Morphodynamics: RCEM 2007, Two Volume Set written by C. Marjolein Dohmen-Janssen and published by CRC Press. This book was released on 2019-08-22 with total page 1271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Around the world, many people live, work and recreate in river, estuarine and coastal areas, systems which are also important wildlife habitats. It is imperative to understand the physics of such systems. A key element here is morphodynamics: the mutual interaction and adjustment of landform topography and fluid dynamics involving the motion of sed