Author: Madhavan RanganathanPublisher:
ISBN:
Category : Air
Languages : en
Pages : 230
Book Description
Development of a Simple Second Order Closure Model for Atmospheric Dispersion of Heavy Gases
Author: Madhavan RanganathanPublisher:
ISBN:
Category : Air
Languages : en
Pages : 230
Book Description
Development and Evaluation of a Simple Second Order Closure Atmospheric Dispersion Model for an Elevated Passive Release
Author: Sandeep SahorePublisher:
ISBN:
Category : Air quality
Languages : en
Pages : 244
Book Description
Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures: Main report
Author: Jerry A. HavensStably Stratified Flow and Dense Gas Dispersion
Author: J. S. PuttockPublisher: Oxford University Press, USA
ISBN:
Category : Science
Languages : en
Pages : 456
Book Description
Very Good,No Highlights or Markup,all pages are intact.
Development of an Atmospheric Dispersion Model for Heavier-than-air Gas Mixtures
Author: Jerry A. HavensThree-dimensional Model for Simulating Atmospheric Dispersion of Heavy-gases Over Complex Terrain
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
To help understand heavy gas releases and simulate the resultant dispersion, we have developed a three-dimensional finite element model called FEM3 and an improved version names FEM3A for solving the time dependent conservation equations based on generalized anelastic approximation. Recent enhancements to the model to include the treatment of dispersion scenarios involving density variations much larger than the liquefied natural gas range and an advanced turbulence submodel based on the buoyancy-extended transport equations. This paper presents the main features of the present model FEM3C and numerical results from the simulations of a field-scale LNG spill experiment.
Development of an Atmospheric Dispersion Model for Heavier-Than-Air Gas Mixtures
Author: Jerry A. HavensPublisher:
ISBN:
Category :
Languages : en
Pages : 183
Book Description
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.
Workbook of Atmospheric Dispersion Estimates
Author: D. Bruce TurnerPublisher: CRC Press
ISBN: 0429612745
Category : Science
Languages : en
Pages : 183
Book Description
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.
Development of an atmospheric dispersion model for heavier-than- air gas mixtures
Author: J.A. HavensA Three-dimensional Second-order Closure Numerical Model of Mesoscale Circulations in the Lower Atmosphere
Author: Tetsuji YamadaPublisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 88
Book Description