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Development Of An Atmospheric Dispersion Model For Heavier Than Air Gas Mixtures Volume 3 Degadis Users Manual
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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 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: 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 1344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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. 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 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 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 Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 FEM3C, an Improved Three-dimensional Heavy-gas Dispersion Model: User's Manual by :
Download or read book FEM3C, an Improved Three-dimensional Heavy-gas Dispersion Model: User's Manual written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1986 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis User's Manual for SLAB by : Lawrence Livermore Laboratory
Download or read book User's Manual for SLAB written by Lawrence Livermore Laboratory and published by . This book was released on 1990 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Services for Family Planning and Infertility, United States, 1982 by : Gerry E. Hendershot
Download or read book Use of Services for Family Planning and Infertility, United States, 1982 written by Gerry E. Hendershot and published by . This book was released on 1988 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.
Book Synopsis HWHM '90 by : Hazardous Materials Control Research Institute
Download or read book HWHM '90 written by Hazardous Materials Control Research Institute and published by . This book was released on 1990 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
