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Development Of An Atmospheric Dispersion Model For Heavier Than Air Gas Mixtures Volume 2 Laboratory Calm Air Heavy Gas Dispersion Experiments
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Book Synopsis Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures. Volume 2. Laboratory Calm Air Heavy Gas Dispersion Experiments by : Jerry A. Havens
Download or read book Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures. Volume 2. Laboratory Calm Air Heavy Gas Dispersion Experiments written by Jerry A. Havens and published by . This book was released on 1985 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory experimental instantaneous releases of right circular cylindrical volumes of heavy gas (Freon-12/air) with initial volumes ranging from 0.034 cu m to 0.531 cu m and specific gravities ranging from 2.2 to 4.2 are described. Releases with initial height-to-diameter ratios of 0.4, 1.0, and 1.57 are reported. The heavy gas flow field surrounding the release is described by time series of gas concentration at various radial and vertical coordinates with respect to release center. Measurements of the gravity current velocities are determined from time-of-onset of measured gas concentration. Calm-air instantaneous heavy gas releases are demonstrated to scale with a characteristic length cube root of V sub i where V sub i is the initial volume, and a characteristic time (V sub i to the 1/6 power)/(sq root of the reduced gravitational acceleration). The scaled laboratory releases predict the gravity-spreading and dilution process occurring during the buoyancy-dominated flow phase of the 2000 cu/m Freon/air instantaneous releases conducted by the British Health and Safety Executive at Thorney Island, UK. The gravity spread and dilution data are used to validate the buoyancy-dominated flow submodel which is incorporated in DEGADIS, the general purpose heavy gas dispersion model developed for the Coast Guard.
Book Synopsis Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures by : Jerry A. Havens
Download or read book Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures written by Jerry A. Havens and published by . This book was released on 1985 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical modeling techniques use to predict atmospheric dispersion of heavy gases are reviewed and critiqued. These dispersion processes are characterized by three phases: (1) near field, negative buoyancy-domainated flow regime; (2) intermediate field, stably stratified shear flow regime; and (3) far field, passive turbulent diffusion regime. Mathematical models of laboratory and natural gravity currents are used to describe the negative buoyancy-dominated regime flow and dilution processes. A laboratory investigation of instantaneous heavy gas releases in calm air demonstrates scaling from small release volumes (0.5 cu m) to large field (2000 cu m) field releases, and is used to develop a mathematical model for the buoyancy-dominated regime. Laboratory data from stratified shear flow mixing experiments are used to develop a model for vertical diffusion of heavy gases in the atmospheric surface layer. The model concepts are consistent with the limiting passive behavior of demonstrated air pollution models. An interactive computer model for heavy gas dispersion (DEGADIS) is developed. The DEGADIS model accounts for the three regimes of heavy gas dispersion processes and can be used to simulate instantaneous, steady state, and transient releases. The model provides predictions of downwind concentration decay which are in good agreement with the full range of field experimental data currently available, and is recommended for incorporation in the Coast Guard hazard assessment computer system.
Book Synopsis Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures by : Jerry A. Havens
Download or read book Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures written by Jerry A. Havens and published by . This book was released on 1985 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures: Main report by : Jerry A. Havens
Download or read book Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures: Main report written by Jerry A. Havens and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Regional Risk Assessment, Vol. II by : A.V. Gheorghe
Download or read book Integrated Regional Risk Assessment, Vol. II written by A.V. Gheorghe and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over recent years there has been an increasing awareness of the risks of locating hazardous industries near heavily populated, environmentally sensitive areas. This new awareness demands a novel approach to safety planning for hazardous industries; one that looks at the problem from the point of view of integrated regional risk assessment which, besides the risks arising from natural events, should also include the risks arising from the processing plants, storage and the transportation of dangerous goods. Volume I of Integrated Regional Risk Assessment highlights the main procedures for the assessment of risks to health and environmental impacts from continuous emissions of pollutants into air, water and soil under normal operating conditions. Volume II deals with the assessment of consequences of accidental releases, helping to answer such questions as: What can go wrong? What are the effects and consequences? How often will it happen? £/LIST£ The main procedural steps are supported by relevant, internationally recognised methods of risk assessment. The book also reviews criteria and guidelines for the implementation of risk assessment and management at different stages. Audience: Students, engineers, and scientists in charge of developing new methodologies for hazard analysis and risk assessment; practitioners of environmental protection; local and governmental authorities charged with implementing environmental risk impact procedures and guidelines.
Book Synopsis Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures. Volume 3. DEGADIS User's Manual by : Jerry A. Havens
Download or read book Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures. Volume 3. DEGADIS User's Manual written by Jerry A. Havens and published by . This book was released on 1985 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mathematical modeling techniques used to predict atmospheric dispersion of heavier-than-air gases discussed in Volume 1 are briefly summarized; these techniques are incorporated in an interactive computer model DEGADIS. Details of DEGADIS implementation are briefly discussed. The necessary input information to simulate a heavier-than-air gas release with DEGADIS is summarized. Example simulations of a steady state and transient release are included. A list of DEGADIS self-diagnostics with suggested actions are included. A listing of DEGADIS is included along with a partial list of program variables. Guidelines for installation of DEGADIS are presented.
Book Synopsis The Coast Guard Engineer's Digest by :
Download or read book The Coast Guard Engineer's Digest written by and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of an atmospheric dispersion model for heavier-than- air gas mixtures by : J.A. Havens
Download or read book Development of an atmospheric dispersion model for heavier-than- air gas mixtures written by J.A. Havens and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Dispersion of Heavy Gases and Small Particles by : G. Ooms
Download or read book Atmospheric Dispersion of Heavy Gases and Small Particles written by G. Ooms and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book contains the papers that have been presented at the IUTAM-Symposium on Atmospheric Dispersion of Heavy Gases and Small Particles, which was held from August 29th to September 2nd 1983 in Scheveningen in The Netherlands. Attendees from many countries were present; 4 review lectures and about 25 research papers were presented. The realization of the symposium was made possible by the support of Delft University of Technology Koninklijke/Shell-Laboratory Amsterdam Prins Maurits Laboratory/Institute for Chemical and Technological Research Royal Netherlands Meteorological Institute. The symposium organization was carried out by the local organi zing committee consisting of F.G.J. Absil - Delft University of Technology G.W. Colenbrander - Koninklijke/Shell-Laboratory Amsterdam G. Ooms - Delft University of Technology G. Opschoor - Prins Maurits Laboratory/Institute for Chemical and Technological Research H. Tennekes - Royal Netherlands Meteorological Institute A.P. van Ulden - Royal Netherlands Meteorological Institute. The work of the organizing committee was supported in many re spects by the sientific committee, which consisted of H. Fiedler - Technische Hochschule Karlsruhe, Fed. Rep. of Germany F.N. Frenkiel - Naval Ship Research and Development Center, Bethesda, Maryland, U.S.A. J.C.R. Hunt - University of Cambridge, England J. Kondo - National Institute for Environmetal Studies, Japan J.L. Lumley - Cornell University, Ithaca, New York, U.S.A."
Book Synopsis Evaluation of Area and Volume Source Dispersion Models for Petroleum and Chemical Industry Facilities by :
Download or read book Evaluation of Area and Volume Source Dispersion Models for Petroleum and Chemical Industry Facilities written by and published by . This book was released on 1992 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the International Symposium on Preventing Major Chemical Accidents by : John Lowell Woodward
Download or read book Proceedings of the International Symposium on Preventing Major Chemical Accidents written by John Lowell Woodward and published by . This book was released on 1987 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Dispersion Modeling by : Alex De Visscher
Download or read book Air Dispersion Modeling written by Alex De Visscher and published by John Wiley & Sons. This book was released on 2013-09-26 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single reference to all aspects of contemporary air dispersion modeling The practice of air dispersion modeling has changed dramatically in recent years, in large part due to new EPA regulations. Current with the EPA's 40 CFR Part 51, this book serves as a complete reference to both the science and contemporary practice of air dispersion modeling. Throughout the book, author Alex De Visscher guides readers through complex calculations, equation by equation, helping them understand precisely how air dispersion models work, including such popular models as the EPA's AERMOD and CALPUFF. Air Dispersion Modeling begins with a primer that enables readers to quickly grasp basic principles by developing their own air dispersion model. Next, the book offers everything readers need to work with air dispersion models and accurately interpret their results, including: Full chapter dedicated to the meteorological basis of air dispersion Examples throughout the book illustrating how theory translates into practice Extensive discussions of Gaussian, Lagrangian, and Eulerian air dispersion modeling Detailed descriptions of the AERMOD and CALPUFF model formulations This book also includes access to a website with Microsoft Excel and MATLAB files that contain examples of air dispersion model calculations. Readers can work with these examples to perform their own calculations. With its comprehensive and up-to-date coverage, Air Dispersion Modeling is recommended for environmental engineers and meteorologists who need to perform and evaluate environmental impact assessments. The book's many examples and step-by-step instructions also make it ideal as a textbook for students in the fields of environmental engineering, meteorology, chemical engineering, and environmental sciences.
Book Synopsis Development of Vapor Dispersion Models for Nonneutrally Buoyant Gas Mixtures-Analysis of TFI/NH3 Test Data by : Thomas O. Spicer
Download or read book Development of Vapor Dispersion Models for Nonneutrally Buoyant Gas Mixtures-Analysis of TFI/NH3 Test Data written by Thomas O. Spicer and published by . This book was released on 1988 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field-scale releases of pressurized anhydrous ammonia were performed by the Lawrence Livermore National Laboratories in 1983 for the U.S. Coast Guard, the Fertilizer Institute, and Environment Canada. Release rates for the four experiments ranged between 80 and 130 kilograms per second. The pressurized liquid ammonia jet formed a denser-than-air aerosol cloud. A method of determining the relative importance of jet and nonjet dispersion processes is discussed. The data from these experiments were analyzed to determine the mass flux of ammonia and the lateral and vertical concentration profile parameters for the cloud (sigma y and sigma z for the Gaussian plume model and SY and SZ for DEGADIS) at 800 meters downwind. These observed values of maximum concentration and concentration profile parameters were compared with DEGADIS and Gaussian plume model predictions. (DEGADIS is an atmospheric dispersion model designed to account for the influences of denser-than-air gases.) In addition, analysis of the experimental data indicated heat transfer to the aerosol cloud was insignificant although the cloud temperature was as low as -60 centigrade. (mjm).
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1986-12 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Workbook of Atmospheric Dispersion Estimates by : D. Bruce Turner
Download or read book Workbook of Atmospheric Dispersion Estimates written by D. Bruce Turner and published by CRC Press. This book was released on 2020-12-17 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This completely updated and revised Second Edition of the popular Workbook of Atmospheric Dispersion Estimates provides an important foundation for understanding dispersion modeling as it is being practiced today. The book and accompanying diskette will help you determine the impacts of various sources of air pollution, including the effects of wind and turbulence, plume rise, and Gaussian dispersion and its limitations. Information is shown in summary graphs as well as in equations. The programs included on the diskette allow you to "get the feel" for the results you'll obtain through the input of various combinations of parameter values. The sensitivity of data to various parameters can be easily explored by changing one value and seeing the effect on the results. The book presents 37 example problems with solutions to show the estimation of atmospheric pollutant concentrations for many situations.
