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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51971

Title: Wind Tunnel Measurement of Pollution Dispersion in the Built Environment of Arrays of Cubic Elements
Authors: Bao-Shi Shiau
Yen-Shen Lin
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Dispersion scales
Wind attack angle
Gaussian distribution
Arrays of cubic elements
Date: 2017-10
Issue Date: 2019-01-10T02:48:19Z
Publisher: Journal of Coastal and Ocean Engineering
Abstract: Abstract: In this study, experiments on the dispersion of pollution in built environment
of cubic building array in-line configuration with different wind directions were
conducted in wind tunnel. Effects of wind attack angle, θ and building array gap,
G/H (G: building array gap, H: cubic building height) on the short range
dispersion were investigated. Measurements of flow field show that the building
array gap increases, the mean velocity increases, and the building array gap
becomes smaller, the turbulence intensity is higher. Results of the flow field and
concentration measurements indicate that the decrease of the cubic building array
gap will be favorable for pollutants dispersion in built environment. The lateral
concentration profiles at downstream stations of source are shown to be
approximately Gaussian distribution when the cubic building array gap G/H=3
with wind attack angle θ=0⁰. As the cubic building array gap G/H=2 and 1 with
wind attack angle θ>0⁰, the lateral concentration profiles at downstream stations
of source tend to be the non-Gaussian form. The wind attack angle of 45⁰ shows
that the lateral dispersion length scales are larger than that of other wind attack
angles. Gap variation of cubic building array has shown no significant effect on
vertical length scales.
Relation: 17(3)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51971
Appears in Collections:[河海工程學系] 期刊論文

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