| 城市热岛成因及其对污染物扩散影响的数值模拟 |
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| 引用本文： | 张凯杨,许春晓,崔桂香,张兆顺,王志石.城市热岛成因及其对污染物扩散影响的数值模拟[J].气象与环境学报,2007,23(3):10-14. |
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| 作者姓名： | 张凯杨 许春晓 崔桂香 张兆顺 王志石 |
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| 作者单位： | 1.清华大学航天航空学院 北京100084;2.澳门大学科技学院 澳门999078 |
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| 基金项目： | 国家自然科学基金(10572073)，澳门特别行政区科学技术发展基金(022/2006/A)共同资助 |
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| 摘 要： | 采用大涡模拟方法,通过数值求解可压缩流体的动力学方程和欧拉型的浓度扩散方程,建立了不同的地表模型,将城市地表差异等因素作为地面热通量的边界条件引入,得到了简单区域上的温度场和流场的三维结构,证实了城乡地表差异是引起热岛现象的根本原因之一,成功再现了城市热岛现象,并研究了城市热岛效应的存在对污染物扩散的影响。
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| 关 键 词： | 城市热岛 成因 大涡模拟 污染物 扩散影响 数值模拟 |
| 收稿时间： | 2007-1-22 |
| 修稿时间： | 2007-01-222007-03-26 |
Numerical simulation of urban heat island evolution and its effect on pollutant transport |
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| ZHANG Kaiyang,XU Chunxiao,CUI Guixiang,ZHANG Zhaoshun,WANG Zhishi.Numerical simulation of urban heat island evolution and its effect on pollutant transport[J].Journal of Meteorology and Environment,2007,23(3):10-14. |
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| Authors: | ZHANG Kaiyang XU Chunxiao CUI Guixiang ZHANG Zhaoshun WANG Zhishi |
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| Institution: | 1.School of Aerospace;Tsinghua University;Beijing 100084;2.Faculty of Science and Technology;University of Macau;Macau 999078 |
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| Abstract: | The compressible hydrodynamic Navier-Stokes equations and concentration diffusion Euler equations were established numerically by Large Eddy simulation method.The difference of the ground surface between urban and rural areas was introduced into the model by different surface conditions of heat flux.The temperature field and velocity field were obtained,and the results suggested that the difference of the ground surface should be one of the fundamental reasons that caused heat island phenomenon.The influence of heat island to pollutant transport was studied by solving the scalar transport equation of Euler type. |
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| Keywords: | Urban heat island Evolution Large Eddy simulation Pollutant Diffusion Numerical simulation |
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