Effect of pollutant source location on air pollutant dispersion around a high-rise building.

Autor: Keshavarzian E; Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW 2751, Australia., Jin R; Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW 2751, Australia., Dong K; Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW 2751, Australia., Kwok KCS; School of Civil Engineering, The University of Sydney, NSW 2006, Australia., Zhang Y; School of Medicine, Tsinghua University, Beijing 100048, China., Zhao M; Centre for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW 2751, Australia.
Jazyk: angličtina
Zdroj: Applied mathematical modelling [Appl Math Model] 2020 May; Vol. 81, pp. 582-602. Date of Electronic Publication: 2020 Jan 15.
DOI: 10.1016/j.apm.2020.01.019
Abstrakt: This article investigates the dispersion of airborne pollutants emitted from different locations near a high-rise building. A Computational Fluid Dynamics (CFD) model for simulating the wind flow field and the pollutant dispersion was developed and validated by wind tunnel data. Then the spreading of the pollutant emitted from different locations to a rectangular-shaped high-rise residential (HRR) building was numerically studied. The pollutant source location was set in a wide range of the position angle and distance between the source and the building. It was found that the pollutant concentration on the building decreases with an increase in the emission distance whereas the effect of the position angle is more complicated. Interestingly, there is a critical range of the position angle from which the emitted pollutants will not spread to the building in a significant way. The effect of the source location was linked to the wind flow field around the building, particularly with several major flows. The vertical distributions of the pollutant concentration on different faces were also investigated, and it was found that these are more affected by the vertical flow near each face. Finally, a mathematical model was developed to evaluate the pollutant concentration as a function of the emission distance and position angle. These findings are helpful to the understanding of the dispersion of airborne pollutants around high-rise buildings and the related hazard management in urban design.
(© 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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