An Experimental Study Of The Dispersion Of Short Duration Emissions In A Turbulent Boundary Layer
Price
Free (open access)
Transaction
Volume
28
Pages
11
Published
1998
Size
871 kb
Paper DOI
10.2495/AIR980671
Copyright
WIT Press
Author(s)
A.G. Robins & J.E. Fackrell
Abstract
This paper describes a wind tunnel study of the behaviour of short duration emissions from a ground level source into a deep turbulent boundary layer. Ensemble averaged properties of the resulting clouds are compared with the predictions of similarity theory and the characteristic profile shapes of the along- wind, lateral and vertical mean concentration distributions are determined. Criteria for puff-like and plume-like behaviour are derived. The dependence of concentration fluctuations on position within a cloud, emission duration and time of travel is investigated. 1 Introduction Many operational and accidental emissions of hazardous material into the environment are of short duration with varying release rate. Considerable attention has been given to the 'dense gas cloud' problem and to continuous, st
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