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Some field experiments on the interaction of plumes from two sources
Author(s) -
Davies B. M.,
Jones C. D.,
Manning A. J.,
Thomson D. J.
Publication year - 2000
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49712656508
Subject(s) - intensity (physics) , turbulence , dispersion (optics) , homogeneous , tracer , environmental science , meteorology , atmospheric sciences , physics , statistical physics , optics , nuclear physics
Some experiments to measure concentration fluctuations downwind of two tracer sources in the atmospheric surface layer are described and the results presented. Fast response detectors were used. The sources were at a height of 4 m and the experiments were restricted to short ranges where the flow and turbulence can be assumed to be approximately homogeneous for the purpose of predicting the dispersion. The results are analysed to show the downwind evolution of the intensity of fluctuations for each source separately and to show how the correlation between the concentrations from the two sources varies with downwind distance and source separation. The variation of the intensity of fluctuations and the correlation with averaging time is also explored. Results support the idea of a universal behaviour when suitably scaled.