Record Display for the EPA National Library Catalog


Main Title Turbulent Diffusion behind Vehicles: Experiments and Verification of Roadway Models.
Author Eskridge, R. E. ; Petersen, W. B. ; Rao, S. T. ; Sistla, G. ;
CORP Author New York State Dept. of Environmental Conservation, Albany.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-R-810475; EPA-600/D-84-141;
Stock Number PB84-194273
Additional Subjects Turbulence ; Diffusion ; Motor vehicles ; Mathematical models ; Verifying ; Models ; Wind tunnels ; Eddies ; Flow visualization ; Flow models ; Tracer gases
Library Call Number Additional Info Location Last
NTIS  PB84-194273 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 24p
Tracer gas was released behind model vehicles in a moving floor wind tunnel and sampled extensively at various downwind distances. A numerical model was used to test various expressions for the eddy diffusion coefficients. The best formulation has been incorporated into the ROADWAY model and it is shown that the current version of the ROADWAY model is an improvement over the earlier version. The predictions of ROADWAY, CALINE3 and HIWAY-2 are compared with the GM Sulfate Dispersion Experiment. It is shown that all three models simulate the GM data very well.