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TURBULENT DIFFUSION BEHIND VEHICLES: EXPERIMENTS AND VERIFICATION OF ROADWAY MODELS
Citation:
Eskridge, R., W.B. Petersen, S.T. Rao, AND G. Sistla. TURBULENT DIFFUSION BEHIND VEHICLES: EXPERIMENTS AND VERIFICATION OF ROADWAY MODELS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-84/141.
Description:
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.