城市大气环境的大涡模拟研究进展

崔桂香; 张兆顺; 许春晓; 黄伟希

doi:10.6052/1000-0992-13-016

城市大气环境的大涡模拟研究进展

doi: 10.6052/1000-0992-13-016

清华大学工程力学系, 北京100084

基金项目: 国家自然科学基金(11132005, 10925210, 11002081); 国家科技部支撑项目(MOST-2011BAK07B01-03)和清华大学高性能计算平台项目资助.

详细信息

作者简介:
崔桂香, 教授, 博士生导师; 环境力学专业委员会副主任. 1977年清华大学工程力学系流体力学专业毕业, 留校任教; 1982 年获得清华大学流体力学专业工学硕士学位; 研究方向: 湍流及大涡模拟, 城市大气环境与复杂流动数值模拟. 科学研究: 多年从事湍流基础研究、大涡模拟和城市大气环境数值模拟研究, 在标量湍流、大涡模拟模式和城市大气环境数值研究中取得重要成果, 发表论文百余篇, 并合作出版了3 部教材和专著.

通讯作者:
崔桂香,cgx@tsinghua.edu.cn

中图分类号: O355
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出版历程
- 收稿日期: 2013-03-05
- 修回日期: 2013-04-19
- 刊出日期: 2013-05-25

Research advances in large eddy simulation of urban atmospheric environment

Department of Mechanics, Tsinghua University, Beijing 100084, China

Funds: The project was supported by the National Natural Science Foundation of China(11132005,10925210,11002081),The National Science and Technology Support Program （2011BAK07B01-03) and Tsinghua National Laboratory for Information Science and Technology.

More Information

Corresponding author: CUI Guixiangy

摘要

摘要: 本文回顾城市大气污染扩散的研究实践与进展, 介绍城市大气环境流动的特点和用现代计算流体力学手段开展城市大气环境的大涡模拟研究方法, 包括: 数学模型, 控制方程、亚网格湍流模式、定解条件及其数值方法. 其中, 重点介绍中尺度到微尺度的耦合模型与适用于复杂城市下垫面(满足大涡模拟分辨率要求且计算量较小)的组合模型;并给出实际算例和结果分析, 包括准确度的统计估算和湍流特性等. 最后, 讨论城市大气环境数值模拟方法进一步改进的方向和城市大气环境流动与污染物扩散数值研究应重点关注的几个问题.
- 城市大气环境 /
- 大涡模拟 /
- 多尺度耦合 /
- 下垫面模型
Abstract: In this paper, we review practices and progresses in the study of pollution dispersion in urban atmosphere. We introduce the inherent features of urban environmental flow, as well as the application of a modern computational fluid dynamic (CFD) method, namely, the large eddy simulation for the study of urban atmospheric environment. We describe the mathematical model, governing equations, subgrid scale model, well-posed initial-boundary conditions and numerical method. In this paper, we focus on a coupling scheme between meso- and micro-scale motions, and a combined underlying surface model for the complex urban canopy, which satisfies the resolution requirements with relatively lower computing load. Practical simulations are presented and analyzed, including the statistical estimation of reliability and the turbulent characteristics, etc. Finally, further improvements needed for numerical methods of urban environment simulations are pointed out, and a number of key scientific problems are raised for numerical studies on urban environmental flows and pollution dispersion.
- urban atmospheric environment /
- large eddy simulation /
- multi-scale coupling /
- underlying surface model

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