风洞
环境科学
风速
色散(光学)
计算流体力学
大气扩散模型
污染物
流利
海洋工程
气象学
风向
高斯分布
空气污染
机械
工程类
物理
光学
有机化学
化学
量子力学
作者
Shujiang Miao,Dafang Fu
标识
DOI:10.1109/icmss.2009.5301821
摘要
A Lagrangian atmospheric dispersion model GRAL dealing with the dispersion of pollutants from a roadway tunnel portal has been introduced, with its application in Nanjing. The results show the dispersion characteristics under local meteorological conditions, especially in low wind speed conditions. A comparison with a Gaussian point source model and a CFD model (FLUENT), has been made. Under the low wind speeds and parallel-to-the-road wind conditions, GRAL has advantages over the Gaussian and CFD models, while the latter two overestimate concentrations as a result of neglecting the influence of the ambient wind fluctuations on position of the jet flow from the portal. The cases here might be useful in someway for pollution controlling, environment impact assessment and project design.
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