【作者】 詹杰民； 汪林飞； 胡文清； 韦永康；

【Author】 ZHAN Jie-min;WANG Lin-fei;HU Wen-qing;WAI Wing-hong,Onyx;Department of Applied Mechanics and Engineering, SUN Yat-sen University;Department of Civil and Environmental Engineering, the Hong Kong Polytechnic University;

【机构】 中山大学应用力学与工程系； 香港理工大学土木与环境工程学系；

【摘要】 城市建筑物布局与结构、背景来流的风速与风向,对污染物的扩散影响巨大,建立一套经济适用的、可靠性较高的模型对城市建设与规划作用巨大。本文在RANS模式的框架下,分别基于Mixture两相流模式和组分模式,建立了空气流动与污染物扩散的数值模拟模型。本文探讨Mixture两相流模式在城市尺度环境问题研究的可行性,为城市尺度环境问题的精细化研究打下基础。两种方法对城市环境中空气流动与污染物扩散模拟具有良好效果,适用于真实城市复杂的建筑群,保证有效精度的同时,也提供了模拟的灵活性。更多还原

【Abstract】 The layout and structure of urban buildings, the wind speed and direction of background inflow have a great impact on the diffusion of pollutants. Establishing a set of economically applicable and reliable models plays a great role in urban construction and planning. In this paper, the numerical models of air flow and pollutant diffusion are established based on Mixture two-phase model and species transport model in the framework of RANS model. This paper explores the feasibility of Mixture two-phase model in the study of urban-scale environmental problems, and lays a foundation for the refined study of urban-scale environmental problems. This method has a good effect on the simulation of air flow and pollutant diffusion in urban environment. It can be applied to complex buildings in real cities, ensuring effective accuracy, and providing flexibility for simulation.更多还原