Validation studies of turbulence closure schemes for high resolutions in mesoscale meteorological models – A case of gas dispersion at the local scale
Validation studies of turbulence closure schemes for high resolutions in mesoscale meteorological models – A case of gas dispersion at the local scale
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中尺度气象模型中高分辨率湍流闭合方案的验证研究——局地尺度气体扩散的案例
DOI：
10.1016/j.atmosenv.2009.04.019
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发表时间：
2009
影响因子：
5
通讯作者：
C. Tremback
中科院分区：
文献类型：
--
作者：
T. Hara;S. Castelli;R. Ohba;C. Tremback
这项工作是对一个大型项目的贡献，旨在开发在日本使用的先进环境评估建模系统。这里考虑的建模系统由 RAMS 和 HYPACT 耦合模型组成。 RAMS 代码经过修改，可以使用 250 m 的精细网格尺寸正确模拟局部尺度现象。在这个方向上，这里的主要目的是研究湍流闭合方案的选择对污染物扩散的影响。我们的 RAMS/HYPACT 模型链的修改版本通过日本原子能研究所 (JAERI) 在筑波山（日本）地区进行的现场实验进行了验证。比较了使用两种替代湍流闭合方案获得的平均流量、湍流和浓度场。讨论了湍流闭合的不同性能，并研究了闭合方案对羽流扩散的影响。
This work is a contribution to a large project, aimed at the development of an advanced environmental assessment modelling system to be used in Japan. The modelling system here considered consisted of the RAMS and HYPACT coupled models. The RAMS code was modified to properly simulate local scale phenomena using a fine mesh size of 250 m. In this direction, the main aim here was to investigate the effect of the choice of the turbulence closure scheme on the dispersion of pollutants. Our modified version of the RAMS/HYPACT model chain was validated using field experiments which were carried out by the Japan Atomic Energy Research Institute (JAERI) in the area of Mt. Tsukuba (Japan). The mean flow, turbulence and concentration fields obtained using two alternative turbulence closure schemes are compared. A discussion on the different performances of the turbulence closures is presented and the influence of the closure schemes over the plume dispersion is investigated.