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A Lagrangian Stochastic Model for Dense Gas Dispersion in the Neutrally-stratified Atmospheric Surface Layer  

Kim, Byung-Gu (Department of Mechanical Engineering, Yonsei University)
Lee, Changhoon (Department of Mechanical Engineering, Yonsei University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.21, no.5, 2005 , pp. 537-545 More about this Journal
Abstract
A new dispersion model for dense gas is constructed in the Lagrangian framework. Prediction of concentration by the proposed model is compared with measure data obtained in the experiment conducted in Thorney Island in 1984. Two major effects of dense gas dispersion, gravity slumping and stratification effect, are successfully incorporated into LDM (Lagrangian dense gas model). Entrainment effect is naturally modelled by introducing stochastic dispersion model with the effect of turbulence suppression by stratification. Not only various releasing conditions but also complex terrain can be extended to, although proposed model is appropriate for flat terrain.
Keywords
Dense (Heavy) gas dispersion model; Thorney Island experiment; Lagrangian stochastic model; Gravity slumping;
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