模拟街道峡谷内的流场和污染物浓度的格子玻尔兹曼方法.PDFVIP

安徽农业大学学报, 2011, 38(6): 957-960 Journal of Anhui Agricultural University [DOI]CNKI：34-1162/S1025.007 网络出版时间：2011-10-25 10:25:54 [URL]/kcms/detail/34.1162.S1025.007.html 模拟街道峡谷内的流场和污染物浓度的格子玻尔兹曼方法 樊冬梅，朱 玲 (安徽农业大学理学院，合肥 230036) 摘 要：构造了模拟街道内的流场及污染物扩散的格子玻尔兹曼模型，并且用这个模型来模拟了不同高宽比的 街道峡谷流场和污染物扩散情况。模拟结果表明，地面附近的污染物浓度随着街道高宽比的增加而递增，这一结果 和以往的研究结果有很好的一致性。 关键词：格子玻尔兹曼方法；空气污染 中图分类号：X11 文献标识码：A 文章编号：1672?352X (2011)06?0957?04 Lattice Boltzmann method for simulation of air flow and pollutant dispersion in street canyon FAN Dong-mei, ZHU Ling (School of Science, Anhui Agricultural University, Hefei 230036) Abstract: A new lattice Boltzmann method model was constituted to simulating the flow patterns and pol- lutant dispersion in street canyons, and it was applied to simulating the flow patterns and pollutant dispersion of different street canyon aspect ratio (AR=H/W). The results show that it makes more difficult to disperse the pol- lutants and more concentration near the ground level with increasing the aspect ratio. The numerical results are found to be in better agreement with those of previous studies. Key words: Lattice Boltzmann method; air pollution vides a new feasible way to simulate the flow patterns 1 Introduction and pollutant dispersion in street canyons. Much attention has been focused on the flow pat- 2 Mathematical Formulation terns and air pollution in street canyons, because of increasing urban pollutants and their adverse i