Physio-chemical modeling of the NO_(x)-O_(3) photochemical cycle and the air pollutants’ reactive dispersion around an isolated building
作者机构:Department of Civil and Environmental EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Future Cities Lab GlobalSingapore-ETH CentreSingapore 138602 Department of BuildingCivil and Environmental Engineering at Concordia UniversityMontrealQuebecCanada Department of Mechanical EngineeringThe University of Hong KongPok-fu-lam RoadHong KongChina Department of Civil EngineeringChongqing UniversityChongqingChina School of Atmospheric SciencesSun Yat-sen UniversityZhuhaiChina
出 版 物:《建筑模拟(英文)》 (Building Simulation)
年 卷 期:2023年第16卷第9期
页 面:1735-1758页
核心收录:
学科分类:0830[工学-环境科学与工程(可授工学、理学、农学学位)] 07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 0812[工学-计算机科学与技术(可授工学、理学学位)]
基 金:The work described in this paper was supported by the Research Grants Council of the Hong Kong Special Administrative Region,China(Project No.C7064-18G) Research Grants Council of the Hong Kong Special Administrative Region,China(Project No.16207118 and No.16211821) This work is also partly supported by the Natural Science Foundation of Chongqing,China(Project No.cstc2019jcyj-msxmX0565 and No.cstc2020jcyj-msxmX0921) the Key Project of Technological Innovation and Application Development in Chongqing(Project No.cstc2019jscxgksbX0017) the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory(Project No.311020001)
主 题:reactive pollutant dispersion NO_(x)-O_(3)cycle air pollution isolated building physio-chemical modelling
摘 要:A numerical physio-chemical model of the NO_(x)-O_(3) photochemical cycle in the near-wake region of an isolated residential/office building has been presented in this *** investigation delves into the dispersion of reactive air pollutants through the lens of fluid phenomenology and its impact on chemical reactivity,formation,transport,deposition,and *** fluid dynamics(CFD)simulations were conducted for the ground-point-source(GES)and roof-pointsource(RES)*** show that the Damköhler number(Da),which quantifies pollutants’physio-chemical timescales,displays a strong inverse proportionality with the magnitude and spread of NO–increasing Da reduces human exposure to the toxic NO and NO_(2) *** different wind directions were considered,the dispersion range of NO exhibited varying shrinking directions as Da ***,as Da increases,the concentration ratio KNO_(2)/KNO_(x),which quantifies the production of NO_(2) resulting from NO depletion,forms sharp high-low gradients near emission *** GES,the dispersion pattern is governed by the fluid’s phenomenological *** RES,the intoxicated area emanates from the building’s leading-edge,with the lack of shielding inhibiting pollutant interactions in the near-wake,resulting in scant physio-chemical *** NO_(2)/NO_(x) distribution follows a self-similar,stratified pattern,exhibiting consistent layering gradients and attributing to the natural deposition of the already-reacted pollutants rather than in-situ *** the end,building design guidelines have been proposed to reduce pedestrian and resident exposure to NO_(x)-O_(3).