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INFLUENCE OF BUILDING WIDTH AND ORIENTATION ON A PLUME DISPERSION IN THE WAKE OF A BUILDING
Citation:
Huber, A. INFLUENCE OF BUILDING WIDTH AND ORIENTATION ON A PLUME DISPERSION IN THE WAKE OF A BUILDING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/309 (NTIS PB90200684), 1989.
Description:
In a wind-tunnel study, the influence of building width and orientation into the wind was examined through concentration profiles in the near wake of the building. he model building was placed in a simulated atmospheric boundary layer. he effects of building width were examined for buildings having width-to-height ratios ranging from 2 to 22. he effects of oblique orientation were examined for angles ranging from -30 to +50 degrees. or most cases, the source was placed midway along the lee side of the building. he stack height was either at ground level of 1.5 times the height of the building. he lateral plume spread from a point source placed near the building was observed to be largest for a width/height ratio of 10. The influence of the end flow around the sides of the building had less effect for wider buildings. or the ground-level source, an oblique angle resulted in a maximum ground level concentration increase by a factor of 2-3 at three building heights downstream. oncentrations were increased by less than a factor or 1.5 at ten building heights downstream. or an elevated source, the building influence on ground-level concentrations was quite similar but with an even larger increase.
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INFLUENCE OF BUILDING WIDTH AND ORIENTATION ON A PLUME DISPERSION IN THE WAKE OF A BUILDING