Title: Proposal of a new Lagrangian particle model for the simulation of dense gas dispersion

Authors: D. Anfossi, G. Tinarelli, S. Trini Castelli, G. Belfiore

Addresses: Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (C.N.R.), Corso Fiume 4, Torino – 10133, Italy. ' ARIANET Srl, via Gilino 9, 20128, Milano, Italy. ' Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (C.N.R.), Corso Fiume 4, Torino – 10133, Italy. ' Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (C.N.R.), Corso Fiume 4, Torino – 10133, Italy

Abstract: A Lagrangian particle dispersion model for dense gas dispersion is proposed. It is a new version of MicroSpray oriented to simulate dense gas dispersion in urban or industrial environment, and includes the treatment of obstacles, complex terrain and low wind. The dense gas descent is computed by a 3D dynamical plume rise/descent model, the gravity spreading and bottom boundary condition are accounted for by empirical formulations. The differences between simulations obtained with the new model and with the standard one are presented. The model is validated against tracer field data gathered in the Thorney Island experiment 8.

Keywords: dense gas dispersion; Langevin equations; gravity spreading; Lagrangian particle model; dispersion modelling; air pollution; air quality.

DOI: 10.1504/IJEP.2011.038419

International Journal of Environment and Pollution, 2011 Vol.44 No.1/2/3/4, pp.200 - 207

Published online: 07 Feb 2011 *

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