A PDF micromixing model of dispersion for atmospheric flow. Part II: application to convective boundary layer

被引：33
作者：
Cassiani, M
Franzese, P
Giostra, U
机构：
[1] Univ Urbino, Fac Sci Ambientali, I-61029 Urbino, Italy
[2] George Mason Univ, Sch Computat Sci, Fairfax, VA 22030 USA
来源：
ATMOSPHERIC ENVIRONMENT | 2005年 / 39卷 / 08期
关键词：
concentration fluctuations; micromixing modelling; Monte Carlo simulation; turbulent dispersion; chemical reactions;
D O I：
10.1016/j.atmosenv.2004.11.019
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The Lagrangian stochastic probability density function (PDF) model developed by Cassiani et al. [Atmos. Environ. (2005) Part 1] is extended to the atmospheric convective boundary layer. The model is applied to simulate concentration statistics and PDF generated by passive releases from point and line sources in the convective boundary layer. A dynamical time-expandable grid is implemented, which optimises the computational resources required for dispersion simulations in atmospheric flow. A parameterised formulation for the micromixing time scale in convective conditions is derived. Model concentration statistics including mean field, fluctuations and concentration PDF are tested with four water tank experiments. (c) 2004 Elsevier Ltd. All rights reserved.
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页码：1471 / 1479
页数：9
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