Record Display for the EPA National Library Catalog


Main Title Dispersion of Dense Gas Releases in a Wind Tunnel.
Author Petersen, W. B. ; Snyder, W. H. ; Ku, J. Y. ; Rao, S. T. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;New York State Dept. of Environmental Conservation, Albany.
Publisher Oct 88
Year Published 1988
Report Number EPA/600/D-88/207;
Stock Number PB89-118509
Additional Subjects Air pollution ; Exhaust gases ; Atmospheric diffusion ; Wind tunnel models ; Aerodynamic configurations ; Gas laws ; Density ratio ; Path of pollutants
Library Call Number Additional Info Location Last
NTIS  PB89-118509 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
The paper documents two dense gas projects undertaken at the US EPA Fluid Modeling Facility. The study investigated the basic nature of the transport and dispersion of a dense gas plume in a simulated neutral atmospheric boundary layer. The two dense gas releases were CO2 and SF6. The configuration of the wind tunnel was the same for both gases, except that the wind speed had to be increased 20% in the SF6 study to avoid laminarization of the plume. The plumes were tracked by mixing a small fraction of ethane with the dense gases and using flame ionization detectors to measure downwind lateral and vertical concentration profiles. The increased density clearly has very significant effects. The vertical spread of the SF6 plume was about two-thirds that of the CO2 plume. Perhaps the most unusual finding was that the shapes of the vertical distributions remained similar far downstream and high non-Gaussian in the outer reaches of the plume.