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RECORD NUMBER: 24 OF 30

OLS Field Name OLS Field Data
Main Title Wind Tunnel and Gaussian Plume Modeling of Building Wake Dispersion.
Author Huber, A. H. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher c1991
Year Published 1991
Report Number EPA-600/J-91/076;
Stock Number PB91-196568
Additional Subjects Plumes ; Air pollution ; Wakes ; Dispersion ; Wind tunnel models ; Model tests ; Boundary layer ; Turbulent flow ; Velocity distribution ; Wind tunnel tests ; Buildings ; Mathematical models ; Gaussian quadrature ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB91-196568 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/04/1991
Collation 15p
Abstract
The paper summarizes a study of the relationship between Gaussian plume models and wind-tunnel models. Wind-tunnel measurements of the distribution of tracer concentrations downwind of a point source in the near wake of a rectangular model building were evaluated. Profiles of mean velocity and turbulence were measured to characterize the flow. These experiments were conducted in both a low-turbulence boundary layer and a simulated-atmospheric boundary layer. The study covered a range of four flow speeds and four different sized buildings. The differences in observed velocity and concentrations between the results for the low turbulence and simulated atmospheric boundary layer flow were not significant very near the building, but these differences increased in significance at downstream distance greater than 10 times the building height. The transition from building-affected dispersion levels to levels that were not significantly different from dispersion without a building was a function of the size of the building. The application of a modified Gaussian plume model showed it to be a simple, well-suited complement to wind-tunnel measurements of mean concentrations.