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Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon

作     者:Shan Ding Rui Yang 

作者机构:Institute of public securityTsinghua UniversityBeijing100084China 

出 版 物:《Journal of Safety Science and Resilience》 (安全科学与韧性(英文))

年 卷 期:2021年第2卷第4期

页      面:238-245页

核心收录:

学科分类:083002[工学-环境工程] 0830[工学-环境科学与工程(可授工学、理学、农学学位)] 07[理学] 081203[工学-计算机应用技术] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0835[工学-软件工程] 0713[理学-生态学] 0812[工学-计算机科学与技术(可授工学、理学学位)] 

主  题:Finite volume method Reduced-order modelling Proper orthogonal decomposition Interpolation Radial basis functions 

摘      要:Hazardous chemical gases will spread rapidly after *** emergency response to that,people need to obtain the information of wind and pollutant in ***,it takes a lot of time to calculate the flow in large-scale urban areas by numerical ***,reduced-order model(ROM)is developed to improve the *** this paper,we propose a model based on proper orthogonal decomposition(POD)and radial basis function(RBF)*** validate the model by calculating the wind field and the pollutant propagation process in a 144 square kilometer area of *** results show that ROM can reduce CPU times by more than 99%at the cost of only 0.1%information loss,comparing with the traditional approach of computational fluid dynamics(CFD).

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