A model for the dispersion of puffs into the planetary boundary-layer
by U. Rizza, C. Mangia, G.A. Degrazia, T. Tirabassi
International Journal of Environment and Pollution (IJEP), Vol. 14, No. 1/2/3/4/5/6, 2000

Abstract: A model for the dispersion of Gaussian puffs into the planetary boundary-layer is presented. The model relies on the relative diffusion theory in which the rate of expansion of the puff is expressed in terms of the spectral properties of turbulence. A new spectral formulation for the turbulent velocities is used, which is valid for different stability conditions ranging from stable to convective. As a preliminary model evaluation, a continuous plume from the experimental campaign of Copenhagen is reproduced as a superposition of discrete emitted puffs. Comparison between predicted and measured ground level concentration data shows a good agreement both for crosswind integrated concentrations and arcwise maxima.

Online publication date: Fri, 18-Jul-2003

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