Main Title |
Concentration Distributions in the Near-Wake of a Building. |
Author |
Lawson., R. F. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
Publisher |
Mar 90 |
Year Published |
1990 |
Report Number |
EPA/600/D-90/071; |
Stock Number |
PB90-246208 |
Additional Subjects |
Wind pressure ;
Aerodynamics ;
Buildings ;
Wakes ;
Turbulence ;
Wind tunnel models ;
Boundary layer ;
Vortices ;
Flow visualization ;
Wind tunnel tests
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-246208 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
45p |
Abstract |
A set of wind-tunnel data is presented which describes the concentration distributions resulting from diffusion of a passive tracer in the near-wake of a cubical building. Sources were located near ground level both upstream and downstream of the building, and centered atop the building. Ground-level centerline concentrations predicted by several simple models for dispersion in building wakes were compared with the measured wind-tunnel data in order to determine the limits within which such models could be expected to provide acceptable predictions. The Huber-Snyder model was found to provide very good agreement with the ground-level centerline concentrations, but at the expense of underpredicting the lateral plume spread. The Ferrara-Cagnetti model provided better agreement with observed plume spreads, but underpredicted the observed concentrations. Based upon observations of transport speed in the wake of similar obstacles, a simple modification to the Ferrara-Cagnetti model is suggested which improves the prediction of concentrations while still providing reasonable estimates of the plume spread. The application of various types of building-wake diffusion models is briefly summarized. |
Supplementary Notes |
Presented at the Workshop on Dispersion Around Groups of Buildings, Roskilde, Denmark, April 30-May 3, 1990. |
Category Codes |
51A; 89 |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/09 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
024228747 |
Origin |
NTIS |
Type |
CAT |