Turbulent Coherent Structures Secondary Currents And Sediment Ridges


Turbulent Coherent Structures Secondary Currents And Sediment Ridges
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Turbulent Coherent Structures Secondary Currents And Sediment Ridges


Turbulent Coherent Structures Secondary Currents And Sediment Ridges
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Author : Scherer, Markus Maximilian
language : en
Publisher: KIT Scientific Publishing
Release Date : 2024-06-19

Turbulent Coherent Structures Secondary Currents And Sediment Ridges written by Scherer, Markus Maximilian and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-06-19 with categories.


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.



Turbulent Coherent Structures Secondary Currents And Sediment Ridges


Turbulent Coherent Structures Secondary Currents And Sediment Ridges
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Author : Markus Scherer
language : en
Publisher:
Release Date : 2022*

Turbulent Coherent Structures Secondary Currents And Sediment Ridges written by Markus Scherer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022* with categories.




Coherent Flow Structures At Earth S Surface


Coherent Flow Structures At Earth S Surface
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Author : Jeremy G. Venditti
language : en
Publisher: John Wiley & Sons
Release Date : 2013-08-28

Coherent Flow Structures At Earth S Surface written by Jeremy G. Venditti 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 2013-08-28 with Science categories.


An expert review of recent progress in the study of turbulent flows with a focus on recently identified organized structures. This book reviews the recent progress in the study of the turbulent flows that sculpt the Earth’s surface, focusing in particular on the organized structures that have been identified in recent years within turbulent flows. These coherent flow structures can include eddies or vortices at the scale of individual grains, through structures that scale with the flow depth in rivers or estuaries, to the large-scale structure of flows at the morphological or landform scale. These flow structures are of wide interest to the scientific community because they play an important role in fluid dynamics and influence the transport, erosion and deposition of sediment and pollutants in a wide variety of fluid flow environments. Scientific knowledge of these structures has improved greatly over the past 20 years as computational fluid dynamics has come to play an increasing important part in building our understanding of coherent flow structures across a broad range of scales. Chapters comprise a series of major, invited papers and a selection of the most novel, innovative papers presented at the second Coherent Flow Structures Conference held August 3-5, 2011 at Simon Fraser University in Burnaby, British Columbia. Chapters focus on six major themes: Dynamics of coherent flow structures (CFS) in geophysical flows Interaction of turbulent flows, vegetation and ecological habitats Coherent structure of atmospheric flows Numerical modeling of coherent flow structures Turbulence in open channel flows Coherent flow structures, sediment transport and morphological feedbacks.



A Hydrodynamical Perspective On The Turbulent Transport Of Bacteria In Rivers


A Hydrodynamical Perspective On The Turbulent Transport Of Bacteria In Rivers
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Author : Krayer, Michael Werner Tobias
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-09-11

A Hydrodynamical Perspective On The Turbulent Transport Of Bacteria In Rivers written by Krayer, Michael Werner Tobias and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-09-11 with categories.


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.



Turbulence In Open Channel Flows


Turbulence In Open Channel Flows
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Author : Hiroji Nakagawa
language : en
Publisher: Routledge
Release Date : 2017-10-02

Turbulence In Open Channel Flows written by Hiroji Nakagawa and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-02 with Technology & Engineering categories.


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.



Coherent Flow Structures In Open Channels


Coherent Flow Structures In Open Channels
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Author : Phil Ashworth
language : en
Publisher:
Release Date : 1996-05-06

Coherent Flow Structures In Open Channels written by Phil Ashworth and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-05-06 with Science categories.


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.



Sediment Transport Dynamics


Sediment Transport Dynamics
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Author : Weiming Wu
language : en
Publisher: CRC Press
Release Date : 2023-11-21

Sediment Transport Dynamics written by Weiming Wu and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-21 with Science categories.


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.



Turbulent Flows


Turbulent Flows
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Author : G. Biswas
language : en
Publisher: CRC Press
Release Date : 2002

Turbulent Flows written by G. Biswas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.


This book allows readers to tackle the challenges of turbulent flow problems with confidence. It covers the fundamentals of turbulence, various modeling approaches, and experimental studies. The fundamentals section includes isotropic turbulence and anistropic turbulence, turbulent flow dynamics, free shear layers, turbulent boundary layers and plumes. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more.



Gravel Bed Rivers


Gravel Bed Rivers
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Author : Michael Church
language : en
Publisher: John Wiley & Sons
Release Date : 2012-02-10

Gravel Bed Rivers written by Michael Church 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 2012-02-10 with Nature categories.


Gravel-Bed Rivers: Processes, Tools, Environments presents a definitive review of current knowledge of gravel-bed rivers, derived from the 7th International Gravel-bed Rivers Workshop, the 5-yearly meeting of the world’s leading authorities in the field. Each chapter in the book has been specifically commissioned to represent areas in which recent progress has been made in the field. The topics covered also represent a coherent progression through the principal areas of the subject (hydraulics; sediment transport; river morphology; tools and methods; applications of science). Definitive review of the current knowledge of gravel-bed rivers Coverage of both fundamental and applied topics Edited by leading academics with contributions from key researchers Thoroughly edited for quality and consistency to provide coherent and logical progression through the principal areas of the subject.



Sedimentology And Sedimentary Basins


Sedimentology And Sedimentary Basins
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Author : Mike R. Leeder
language : en
Publisher: John Wiley & Sons
Release Date : 2009-04-01

Sedimentology And Sedimentary Basins written by Mike R. Leeder 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 2009-04-01 with Science categories.


Sedimentology is a core discipline of earth and environmental sciences. It enquires the origins, transport and deposition of mineral sediment on the Earth's surface. The subject is a link between positive effects arising from the building of relief by tectonics and the negative action of denudation in drainage catchments and tectonic subsidence in sedimentary basins. The author addresses the principles of the subject, emphasising the advantages of a general science approach and the importance of understanding modern processes. Sedimentology and Sedimentary Basins is not an encyclopaedia, but attempts to stimulate interdisciplinary thought across the whole subject area and related disciplines. The book has been designed to meet the needs of earth and environmental science undergraduates.