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Computational Study Of The Effects Of Surface Contamination On The Gas Transfer Across The Air Water Interface
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Book Synopsis Computational Study of the Effects of Surface Contamination on the Gas Transfer Across the Air-water Interface by : Akar Yasemin
Download or read book Computational Study of the Effects of Surface Contamination on the Gas Transfer Across the Air-water Interface written by Akar Yasemin and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Transfer at Water Surfaces by : W. Brutsaert
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.
Book Synopsis The Effects of Surface Films on the Transfer of Gases Across the Air-water Interface by : Richard R. Pardi
Download or read book The Effects of Surface Films on the Transfer of Gases Across the Air-water Interface written by Richard R. Pardi and published by . This book was released on 1973 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Abstracts of the Second International Symposium on Gas Transfer at Water Surfaces by :
Download or read book Abstracts of the Second International Symposium on Gas Transfer at Water Surfaces written by and published by . This book was released on 1990 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Laboratory Study of Gas Transfer Across an Air-water Interface by : Stephen Scott Isenogle
Download or read book A Laboratory Study of Gas Transfer Across an Air-water Interface written by Stephen Scott Isenogle and published by . This book was released on 1985 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Exchange Across the Air-water Interface by : James Robert Ledwell
Download or read book Gas Exchange Across the Air-water Interface written by James Robert Ledwell and published by . This book was released on 1989 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Transfer at Water Surfaces by : M. A. Donelan
Download or read book Gas Transfer at Water Surfaces written by M. A. Donelan and published by American Geophysical Union. This book was released on 2002-01-21 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book discusses the complex phenomena of gas transfer processes within the sciences of fluid dynamics and biogeochemistry. It covers: 1.) Effects of surface waves and turbulence on gas transfer. 2.) Effects of buoyancy and surfactants on gas transfer. 3.) Gas gransfer in strong turbulent flows. 4.) Remote sensing for large-scale gas transfer. 5.) gas transfer by aeration.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ocean-Atmosphere Interactions of Gases and Particles by : Peter S. Liss
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.
Book Synopsis Note on the Parametrization of Turbulent Gas Transfer Across an Air-water Interface by : Sergej Aleksandrovič Kitajgorodskij
Download or read book Note on the Parametrization of Turbulent Gas Transfer Across an Air-water Interface written by Sergej Aleksandrovič Kitajgorodskij and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantifying and Parameterizing Air-water Gas Transfer Enhancement Via Capillary-gravity Bow Waves and Streamwise Counter-rotating Vortices in Environmental and Industrial Applications by : Katie Adler
Download or read book Quantifying and Parameterizing Air-water Gas Transfer Enhancement Via Capillary-gravity Bow Waves and Streamwise Counter-rotating Vortices in Environmental and Industrial Applications written by Katie Adler and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air-water gas transport is an important process for industrial applications, such as algae production, and influences greenhouse gas emissions from or uptake into water bodies. Parameterizing and efficiently enhancing air-water gas transfer can advance sustainable energy and food technology by reducing the costs of large-scale algae production. Physical properties of the water-side scalar concentration boundary layer beneath an air-water interface determine the air-water transfer rate of weakly water-soluble gases, such as carbon dioxide (CO2) and oxygen (O2). These physical properties depend greatly on water surface deformation and water-side near surface motions. Parameterizations, based on metrics from surface particle image velocimetry (SPIV) and an acoustic Doppler velocimeter (ADV), for gas transfer velocity were compared to direct reaeration rate measurements, in the presence of complicated upwelling regions caused by longitudinal bed ridges which have been shown to increase gas transfer velocity by 9-15%. Estimates of gas transfer from ADV measurements were reasonable, with root mean square error values of 1.6-1.8 cm/h for the three models considered. The model based on the structure function of SPIV data best predicted gas transfer in the case with no bed ridges. The surface divergence, spectral, and structure function methods were similarly accurate for the case with bed ridges. Both ADV and SPIV data reveal significant lateral variation in gas transfer velocity in the presence of longitudinal bed ridges. The empirical constant in the small eddy model also varies across methods and flow cases. We further explore air-water gas transfer parameterizations in wavy flows. Specifically, we measure the impact of small (capillary-gravity) waves isolated from wind on a larger scale than previous gas transfer experiments without wind. An array of 3.2-mm-diameter, cylindrical, acrylic dowels was suspended above a 0.6-m-wide recirculating flume to penetrate the water surface by 1-2 cm and generate capillary-gravity bow waves. High flow speeds introduce additional turbulence due to boundary layer shear and inlet and outlet conditions. To achieve higher relative velocities and isolate the impact of relative dowel speed from the background flow speed, which induces boundary layer turbulence, a conveyor belt apparatus on which the dowels could be mounted was constructed. Velocity is measured using a Venturi flow meter and acoustic Doppler velocimeter. Dissolved oxygen reaeration experiments with static dowels, moving dowels, and no dowels were compared. A model to predict gas transfer enhancement due to these waves as a function of flow conditions is proposed. The gas transfer velocity at 60-cm/s flow speed was 68% higher when static dowels were present. The gas transfer velocity at 5-cm/s flow speed was 607% higher when dowels moving upstream at 64 cm/s were present. The maximum gas transfer velocity was 43.9 cm/h (equivalent to 40.4 cm/h for CO2). The models we identified or developed and the gas transfer enhancement achievements can inform the development of sustainable technologies for carbon sequestration or accessible, sustainable energy and food production. These hydrodynamic enhancements of air-water gas transfer rate can be combined with chemical enhancements to reduce capital and energy costs and net CO2 emissions of large-scale algae production as well as potentially eliminate the need to site algae pond facilities near sources of concentrated CO2.
Book Synopsis Gas Transfer at the Air-water Interface in a Turbulent Flow Environment by : Herlina
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:
Book Synopsis Air-water Gas Transfer by : Bernd Jähne
Download or read book Air-water Gas Transfer written by Bernd Jähne and published by . This book was released on 1995 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Transfer at Air-water Interfaces by : Nuri Merzi
Download or read book Gas Transfer at Air-water Interfaces written by Nuri Merzi and published by . This book was released on 1987 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Transfer at the Air-water Interface in a Turbulent Flow Environment by :
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.
Book Synopsis The Effect of Waves on Air-water Gas Transfer by : Ekaterini Daniil-Margariti
Download or read book The Effect of Waves on Air-water Gas Transfer written by Ekaterini Daniil-Margariti and published by . This book was released on 1988 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Description of an Air-tight Gas Transfer Flume and an Experimental Program for Mass Transfer at the Air-water Interface by : Nuri Merzi
Download or read book Description of an Air-tight Gas Transfer Flume and an Experimental Program for Mass Transfer at the Air-water Interface written by Nuri Merzi and published by . This book was released on 1990 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
