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Author : Herlina
Publisher :
ISBN 13 : 9783937300740
Total Pages : 128 pages
Book Rating : 4.3/5 (7 download)
Download or read book Gas Transfer at the Air-water Interface in a Turbulent Flow Environment written by Herlina and published by . This book was released on 2005 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (136 download)
Download or read book Gas Transfer at the Air-water Interface in a Turbulent Flow Environment written by and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gas transfer process across the air-water interface in a ottom-shear-induced turbulent environment was investigated to gain improved fundamental understanding of the physical mechanisms that control the process. For this purpose, it is necessary to reveal the hydrodynamics of the flow field as well as the molecular diffusion and the turbulent transport contributions to the total flux. Therefore, detailed laboratory experiments were conducted to obtain these information.The experiments were performed in a grid-stirred tank using a combined Particle Image Velocimetry - Laser Induced Fluorescence (PIV-LIF) technique that has been developed for these near surface gas transfer measurements. The turbulence characteristics of the velocity near the interface were acquired from the PIV measurements and showed generally good agreement with the theoretical profiles from Hunt & Graham (1978). The LIF technique enabled visualization of the planar concentration fields which provided more insight into the gas transfer mechanisms. The high data resolution allowed detailed quantification of the concentration distribution within the thin aqueous boundary layer. The mean and turbulent fluctuation characteristics of the concentration could be elucidated and the molecular diffusion contribution to the total flux across the interface could be determined. With the combined PIV-LIF technique, which enables simultaneous and spatially synoptic measurements of 2D velocity and concentration fields, the turbulent mass flux term cw and also the total mass flux across the air-water interface could be quantified directly. For the first time, a particular trend can be inferred from the measured mean cw profiles. It could also be shown that the contribution of the turbulent mass flux to the total gas flux is significant. The co-spectra indicated different behavior for the cases with lower and higher turbulent Reynolds numbers.The interrelated interpretation of the obtained results suggest that the gas transfer process is controlled by a spectrum of different eddy sizes and the gas transfer at different turbulence levels can be associated to certain eddy sizes. For high turbulence levels the gas transfer should be asymptotic to the small eddy model, whereas for low turbulence level to the large eddy model. The new results of turbulent mass flux should aid as an excellent database in refining numerical models and developing more accurate models for the prediction of the transfer velocity.
Author : Herlina
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Direct Numerical Simulation of Gas Transfer Through the Air-water Interface in a Turbulent Flow Environment written by Herlina and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christoph S. Garbe
Publisher : Springer Science & Business Media
ISBN 13 : 3540369066
Total Pages : 330 pages
Book Rating : 4.5/5 (43 download)
Download or read book Transport at the Air-Sea Interface written by Christoph S. Garbe and published by Springer Science & Business Media. This book was released on 2008-06-30 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: One key uncertainty in predictions of future climate is caused by the lack of knowledge of transport processes in the air-water interface; this poses the main transfer resistance between oceans and atmosphere. This book reviews recent progress in the domains of experimental process studies as well as computer stimulation. It represents an early approach of merging insights gained in both fields and broadens our understanding of air-water gas and heat exchange.
Author : Sajjan G. Shiva
Publisher : Taylor & Francis
ISBN 13 : 0203109244
Total Pages : 500 pages
Book Rating : 4.2/5 (31 download)
Download or read book Fluid Mechanics of Environmental Interfaces written by Sajjan G. Shiva and published by Taylor & Francis. This book was released on 2012-11-21 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Fluid Mechanics (EFM) studies the motion of air and water at several different scales, the fate and transport of species carried along by these fluids, and the interactions among those flows and geological, biological, and engineered systems. EFM emerged some decades ago as a response to the need for tools to study problems of flow an
Author : Carlo Gualtieri
Publisher : Taylor & Francis
ISBN 13 : 1134064233
Total Pages : 349 pages
Book Rating : 4.1/5 (34 download)
Download or read book Fluid Mechanics of Environmental Interfaces written by Carlo Gualtieri and published by Taylor & Francis. This book was released on 2008-02-19 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: An environmental interface is defined as a surface between two abiotic or biotic systems, in relative motion and exchanging mass, heat and momentum through biophysical and/or chemical processes. These processes fluctuate temporally and spatially. The book first treats exchange processes occurring at the interfaces between atmosphere and the surface of the sea, and atmosphere and land surface. These exchanges include the effect of vegetation, transport of dust and dispersion of passive substances within the atmosphere. Processes at the environmental interfaces of freshwater, such as gas-transfer at free-surfaces of rivers, advective diffusion of air bubbles in turbulent water flows and boundary-layers phenomena in vegetated open channels are also described. Finally, the book deals with the phenomena that affect transport of material to and from the surface of an organism, including molecular and turbulent diffusion. The relevant issues related to mass transfer to and from benthic plants and animals are further considered in detail. The book will be of interest to graduate students and researchers in environmental sciences, civil engineering and environmental engineering, (geo)physics and applied mathematics.
Author : Evan Variano
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.E/5 ( download)
Download or read book Measurements of Gas Transfer and Turbulence at a Shear-free Turbulent Air-water Interface written by Evan Variano and published by . This book was released on 2007 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carlo Gualtieri
Publisher : CRC Press
ISBN 13 : 0203895355
Total Pages : 349 pages
Book Rating : 4.2/5 (38 download)
Download or read book Fluid Mechanics of Environmental Interfaces written by Carlo Gualtieri and published by CRC Press. This book was released on 2008-02-07 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: An environmental interface is defined as a surface between two abiotic or biotic systems, in relative motion and exchanging mass, heat and momentum through biophysical and/or chemical processes. These processes fluctuate temporally and spatially. The book first treats exchange processes occurring at the interfaces between atmosphere and the surface
Author : W. Brutsaert
Publisher : Springer Science & Business Media
ISBN 13 : 9401716609
Total Pages : 615 pages
Book Rating : 4.4/5 (17 download)
Download or read book Gas Transfer at Water Surfaces written by W. Brutsaert and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transfer across the surface of environmental waters is of interest as an important phase in the geophysical and natural biochemical cycles of numer ous substances; indeed it governs the transition, one way or the other, be tween the dissolved state in the water and the gaseous state in the atmo sphere. Especially with increasing population and industrialization, gas transfer at water surfaces has become a critical factor in the understanding of the various pathways of wastes in the environment and of their engineering management. This interfacial mass transfer is, by its very nature, highly complex. The air and the water are usually in turbulent motion, and the interface be tween them is irregular, and disturbed by waves, sometimes accompanied by breaking, spray and bubble formation. Thus the transfer involves a wide variety of physical phenomena occurring over a wide range of scales. As a consequence, scientists and engineers from diverse disciplines and problem areas, have approached the problem, often with greatly differing analytical and experimental techniques and methodologies.
Author : Peter S. Liss
Publisher : Springer
ISBN 13 : 3642256430
Total Pages : 315 pages
Book Rating : 4.6/5 (422 download)
Download or read book Ocean-Atmosphere Interactions of Gases and Particles written by Peter S. Liss and published by Springer. This book was released on 2013-12-18 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans and atmosphere interact through various processes, including the transfer of momentum, heat, gases and particles. In this book leading international experts come together to provide a state-of-the-art account of these exchanges and their role in the Earth-system, with particular focus on gases and particles. Chapters in the book cover: i) the ocean-atmosphere exchange of short-lived trace gases; ii) mechanisms and models of interfacial exchange (including transfer velocity parameterisations); iii) ocean-atmosphere exchange of the greenhouse gases carbon dioxide, methane and nitrous oxide; iv) ocean atmosphere exchange of particles and v) current and future data collection and synthesis efforts. The scope of the book extends to the biogeochemical responses to emitted / deposited material and interactions and feedbacks in the wider Earth-system context. This work constitutes a highly detailed synthesis and reference; of interest to higher-level university students (Masters, PhD) and researchers in ocean-atmosphere interactions and related fields (Earth-system science, marine / atmospheric biogeochemistry / climate). Production of this book was supported and funded by the EU COST Action 735 and coordinated by the International SOLAS (Surface Ocean- Lower Atmosphere Study) project office.
Author : Krayer, Michael Werner Tobias
Publisher : KIT Scientific Publishing
ISBN 13 : 3731513102
Total Pages : 290 pages
Book Rating : 4.7/5 (315 download)
Download or read book A hydrodynamical perspective on the turbulent transport of bacteria in rivers written by Krayer, Michael Werner Tobias and published by KIT Scientific Publishing. This book was released on 2023-09-11 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Alun Thomas
Publisher : CRC Press
ISBN 13 : 0415365465
Total Pages : 2354 pages
Book Rating : 4.4/5 (153 download)
Download or read book Sprayed Concrete Lined Tunnels written by Alun Thomas and published by CRC Press. This book was released on 2008-10-08 with total page 2354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practising engineers on site, in the design office or in client organizations will find this book an excellent introduction to the design and construction of sprayed concrete lined (SCL) tunnels. The complex behaviour of the early age behaviour of the sprayed concrete requires careful management. This book covers all aspects of SCL tunnelling – from the constituents of sprayed concrete to detailed design and management during construction. Although there is a close interdependence between all the facets of sprayed concrete, few engineers have the right breadth of experience and expertise, and this urgently needs to be transferred to the wider engineering community. Disseminating essential information for tunnelling engineers, Sprayed Concrete Lined Tunnels is key reading for all involved in or studying the process.
Author : Hubert Chanson
Publisher : Elsevier
ISBN 13 : 0080472699
Total Pages : 485 pages
Book Rating : 4.0/5 (84 download)
Download or read book Environmental Hydraulics for Open Channel Flows written by Hubert Chanson and published by Elsevier. This book was released on 2004-10-14 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Hydraulics is a new text for students and professionals studying advanced topics in river and estuarine systems. The book contains the full range of subjects on open channel flows, including mixing and dispersion, Saint-Venant equations method of characteristics and interactions between flowing water and its surrondings (air entrainment, sediment transport). Following the approach of Hubert Chanson's highly successful undergraduate textbook Hydraulics of Open Channel Flow, the reader is guided step-by-step from the basic principles to more advanced practical applications. Each section of the book contains many revision exercises, problems and assignments to help the reader test their learning in practical situations. ·Complete text on river and estuarine systems in a single volume ·Step-by-step guide to practical applications ·Many worked examples and exercises
Author : Harindra Joseph Fernando
Publisher : CRC Press
ISBN 13 : 1439816697
Total Pages : 638 pages
Book Rating : 4.4/5 (398 download)
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.
Author : Harindra Joseph Fernando
Publisher : CRC Press
ISBN 13 : 1466591145
Total Pages : 1197 pages
Book Rating : 4.4/5 (665 download)
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.
Author : Vijay P. Singh
Publisher : Water Resources Publication
ISBN 13 : 9781887201223
Total Pages : 298 pages
Book Rating : 4.2/5 (12 download)
Download or read book Hydraulic Modeling written by Vijay P. Singh and published by Water Resources Publication. This book was released on 1999 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Louis J. Thibodeaux
Publisher : John Wiley & Sons
ISBN 13 : 9780471612957
Total Pages : 632 pages
Book Rating : 4.6/5 (129 download)
Download or read book Environmental Chemodynamics written by Louis J. Thibodeaux and published by John Wiley & Sons. This book was released on 1996-02-15 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: What happens to a chemical once it enters the natural environment?How do its physical and chemical properties influence itstransport, persistence, and partitioning in the biosphere? How donatural forces influence its distribution? How are the answers tothese questions useful in making toxicological and epidemiologicalforecasts? Environmental Chemodynamics, Second Edition introduces readers tothe concepts, tools, and techniques currently used to answer theseand other critical questions about the fate and transport ofchemicals in the natural environment. Like its critically acclaimedpredecessor, its main focus is on the mechanisms and rates ofmovement of chemicals across the air/soil, soil/water, andwater/air interfaces, and on how natural processes work to mobilizechemicals near and across interfaces--information vital toperforming human and ecological risk assessments. Also consistent with the first edition, EnvironmentalChemodynamics, Second Edition is organized to accommodate readersof every level of experience. The first section is devoted totheoretical underpinnings and includes discussions of mass balance,thermodynamics, transport science concepts, and more. The secondsection concentrates on practical aspects, including the movementbetween bed-sediment and water, movement between soil and air, andintraphase chemical behavior. This revised and updated edition of Louis J. Thibodeaux's 1979classic features new or expanded coverage of: * Equilibrium models for environmental compartments * Dry deposition of particles and vapors onto water and soilsurfaces * Chemical profiles in rivers and estuaries, particles and porousmedia * Fate and transport in the atmospheric boundary layer and withinsubterranean media * Chemical exchange between water column and bed-sediment * Intraphase chemical transport and fate This Second Edition of Environmental Chemodynamics also includestwice as many references and 50% more exercises and practiceproblems.
