Filtering effect of wind flow turbulence on atmospheric pollutant dispersion |
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Authors: | Mohamed F Yassin |
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Institution: | (1) Department of Environmental Technology and Management, Kuwait University, P.O. Box 5969, Kuwait, Safat, 13060, Kuwait;(2) Faculty of Engineering, Assiut University, Assiut, 71516, Egypt |
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Abstract: | This paper presents a model for coupling the statistics of wind velocity distribution and atmospheric pollutant dispersion.
The effect of wind velocity distribution is modeled as a three-dimensional finite-impulse response (3D-FIR) filter. A phase
space representation of the 3D-FIR filter window is discussed. The resulting pollutant dispersion is the multiplication in
the phase space of the 3-D Fourier transform of the pollutant concentration and the volume described by the filter window
coefficients. The shape of the filter window in the phase space enables representing such effects as vortex shedding thermal
currents, etc. The impact of spatial distribution of the sensors on the resulting pollutant spatial distribution and the 3-D
FIR filter model employed also discuss. The case of a neutrally buoyant plume emitted from an elevated point source in a turbulent
boundary layer considers. The results show that wind turbulence is an important factor in the pollutant dispersion and introduces
expected random fluctuations in pollutant distribution and leads to spreading the distribution due to wind mixing. |
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Keywords: | |
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