Title: Predicting concentration fluctuations with a puff-particle model

Authors: P. de Haan

Addresses: INFRAS, Muehlemattstr. 45, 3007 Bern, Switzerland

Abstract: This paper demonstrates that the puff-particle model (PPM) allows for the prediction of concentration fluctuations (in addition to the estimation of the concentration itself). Several models have been developed based on Gifford|s meandering plume concept to separate the dispersing effect of instantaneous plume (or puff) growth, and of meandering. They all have in common the assumption of a certain shape of the probability density function of concentration, and that the variance of concentration fluctuations is derived from the properties of turbulence. In contrast, the PPM aims at simulating a realistic 3-D meandering of the puffs, which allows for direct determination of the higher moments of concentration, whilst enabling the individual puffs to account for inhomogeneous conditions.

Keywords: concentration fluctuations; particle model; plume meandering; puff model; relative dispersion.

DOI: 10.1504/IJEP.2001.000605

International Journal of Environment and Pollution, 2001 Vol.16 No.1/2/3/4/5/6, pp.49-56

Published online: 07 Jul 2003 *

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