A 3D Langrangian particle model for the atmospheric dispersion of toxic pollutants
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Dosyalar
Tarih
2002
Yazarlar
Dergi Başlığı
Dergi ISSN
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
A 3D Lagrangian particle model has been presented for the atmospheric dispersion of the toxic pollutants released from industrial stacks. As the mean wind speed and direction is changed with height in a real atmosphere, the height of the exhaust stack may have a strong impact on the pollutant dispersion and ground concentrations. An elevated continuous release of non-buoyant gas in a neutrally stratified atmosphere has been simulated, for various stack heights. The turbulent atmospheric parameters like vertical profiles of fluctuating wind velocity components and eddy lifetime were calculated using a semi-empirical mathematical model. The numerically calculated horizontal and vertical dispersion coefficients (?y and ?z) are compared with the Pasquill's empirical ?'s. The ground concentration as a function of downwind distance has been compared with the Green glow data. The ground concentrations for various release heights were compared with the Gaussian plume model. The comparison indicated a need for using either a modified Gaussian model or a 3D numerical mathematical model for pollutant dispersion and ground concentration calculations. Copyright © 2002 John Wiley & Sons, Ltd.
Açıklama
Anahtar Kelimeler
Atmospheric dispersion, Complex topography, Flow modelling, Lagrangian model, Numerical modelling, Trajectory model
Kaynak
International Journal of Energy Research
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
26
Sayı
2
