DOI: 10.1016/j.atmosenv.2014.01.049
Scopus记录号: 2-s2.0-84897012673
论文题名: A study of interunit dispersion around multistory buildings with single-sided ventilation under different wind directions
作者: Ai Z ; T ; , Mak C ; M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 88 起始页码: 1
结束页码: 13
语种: 英语
英文关键词: CFD
; Interunit dispersion
; Multistory buildings
; Reentry ratio
; Tracer gas
; Wind directions
Scopus关键词: Air pollution control
; Atmospheric movements
; Computational fluid dynamics
; Tall buildings
; Walls (structural partitions)
; Computational fluid dynamics methods
; Dispersion characteristics
; Multistory building
; Pollutant dispersions
; Prevailing wind directions
; Single-sided ventilations
; Tracer gas
; Wind directions
; Aerosols
; aerosol composition
; airflow
; atmospheric pollution
; computational fluid dynamics
; dispersion
; multistorey building
; pollutant transport
; tracer
; ventilation
; wind direction
; air conditioning
; air pollutant
; airflow
; article
; atmospheric dispersion
; building industry
; computational fluid dynamics
; pollution transport
; priority journal
; turbulent flow
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: This study examines the interunit dispersion characteristics in and around multistory buildings under wind-induced single-sided ventilation conditions using computational fluid dynamics (CFD) method, under the hypothesis that infectious respiratory aerosols exhausted from a unit can reenter into another unit in a same building through opened windows. The effect of balconies on the interunit dispersion pattern is considered. The RNG k ε model and the two-layer near-wall model are employed to establish the coupled indoor and outdoor airflow field, and the tracer gas technique is adopted to simulate pollutant dispersion. Reentry ratios from each unit to other units under prevailing wind directions are quantified and the possible interunit dispersion routes are then revealed. It is found that many reentry ratios appear to reach around 10.0%, suggesting that the interunit dispersion is an important pollutant transmission route. The interunit dispersion pattern is highly dependent on the incident wind direction and the fact whether the building has protrusive envelope features. On average, the strongest dispersion occurs on the windward wall of the buildings under oblique wind direction, owing to high ACH (air change per hour) values and unidirectional spread routes. Except under a normal incident wind, the presence of balconies intensifies the interunit dispersion by forming dispersion channels to increase the reentry ratios. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81014
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong
Recommended Citation:
Ai Z,T,, Mak C,et al. A study of interunit dispersion around multistory buildings with single-sided ventilation under different wind directions[J]. Atmospheric Environment,2014-01-01,88