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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11118

Title: Simulations of the dispersion of reactive pollutants in a street canyon, considering different chemical mechanisms and micromixing
Authors: Garmory, Andrew
Kim, I.S.
Britter, R.E.
Mastorakos, E.
Keywords: Turbulent reacting flows
Stochastic fields
Probability density function
Pollution
Urban
Issue Date: 2009
Publisher: © Elsevier Ltd.
Citation: GARMORY, A. ... et al., 2009. Simulations of the dispersion of reactive pollutants in a street canyon, considering different chemical mechanisms and micromixing. Atmospheric Environment, 43 (31), pp. 4670 - 4680.
Abstract: The Stochastic Fields (SF) or Field Monte Carlo method has been used to model the dispersion of reactive scalars in a street canyon, using a simple chemistry and the CBM-IV mechanism. SF is a Probability Density Function (PDF) method which allows both means and variances of the scalars to be calculated as well as considering the effect of segregation on reaction rates. It was found that the variance of reactive scalars such as NO2 was very high in the mixing region at roof-top level with rms values of the order of the mean values. The effect of segregation on major species such as O3 was found to be very small using either mechanism, however, some radical species in CBM-IV showed a significant difference. These were found to be the seven species with the fastest chemical timescales. The calculated photostationary state defect was also found to be in error when segregation is neglected.
Description: This article was published in the journal, Atmospheric Environment [© Elsevier Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.atmosenv.2008.07.033
Version: Accepted for publication
DOI: 10.1016/j.atmosenv.2008.07.033
URI: https://dspace.lboro.ac.uk/2134/11118
Publisher Link: http://dx.doi.org/10.1016/j.atmosenv.2008.07.033
ISSN: 1352-2310
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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