Main Title |
Predictions of highway emissions by a second order closure model / |
Author |
Teske, Milton E. ;
Lewellen, W. S.
|
Other Authors |
|
CORP Author |
Aeronautical Research Associates of Princeton, Inc., NJ.;Environmental Sciences Research Lab., Research Triangle Park, NC. |
Publisher |
Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available through the National Technical Information Service [distributor], |
Year Published |
1979 |
Report Number |
EPA/600-4-79-013; EPA-68-02-2285; PB292703 |
Stock Number |
PB-292 703 |
OCLC Number |
05211173 |
Subjects |
Automobiles--Motors--Exhaust gas--Mathematical models
|
Additional Subjects |
Air pollution ;
Exhaust emissions ;
Mathematical models ;
Highways ;
Sulfur hexafluoride ;
Sulfates ;
Transport properties ;
Boundary layer ;
Wind(Meteorology) ;
Graphs ;
Concentration(Composition) ;
Atmospheric diffusion ;
Tracer studies ;
Automobile exhaust
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600-4-79-013 |
|
Headquarters Library/Washington,DC |
04/15/2014 |
EKBD |
EPA-600/4-79-013 |
|
Research Triangle Park Library/RTP, NC |
08/22/2003 |
ELBD ARCHIVE |
EPA 600-4-79-013 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
NTIS |
PB-292 703 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
x ; 83 pages : charts ; 28 cm |
Abstract |
The dispersion of sulfur hexafluoride tracer and sulfate from automobile emissions in the immediate vicinity of a highway were estimated for conditions similar to those existing during the General Motors sulfate dispersion experiment conducted at a GM test track. A second-order closure model of turbulent transport in the planetary boundary layer was used to predict the steady-state dispersion under two conditions: with the mean wind and velocity component variances specified by the data or predicted with the aid of an automobile wake model. The GM measured wind data apparently suffered from low vertical velocity variance readings at the 1.5 meter height, and led to an overprediction of the SF6 levels by an average factor of 1.77 for the 18 tower collection points during the 15 test days. The correlation fell to 0.96 of the measured levels when the model also predicted the wind fields. The results indicate that close to the highway, buoyancy effects were small even in the critical case when the wind is light and aligned with the roadway. |
Notes |
"EPA-600/4-79-013." Prepared by Aeronautical Research Associates of Princeton, Inc., under contract 68-02-2285. "Project Officer Francis S. Binkowski." ""Feb. 1979. Includes bibliographical references. |