Numerical simulation of the solar radiation effect on the aerodynamics, heat exchange, and pollution transfer in a street canyon
This work investigates the influence of solar radiation on the aerodynamics, heat transfer, and pollutant dispersion in a street canyon. The main purpose of this study is to develop a mathematical model of aerodynamics, coupled heat transfer, and pollutant dispersion, as well as to examine the impact of solar heating on air quality in the pedestrian breathing zone (up to 2 m from the bottom of the canyon). The microscale model M2UE has been extended with a module for calculating coupled heat transfer between the ambient environment, building walls, and road surfaces. The study is based on the Reynolds equations and the k-ε turbulence model with buoyancy effects, considering heat transfer both inside the canyon and within the solid enclosing surfaces. A numerical experiment was conducted to simulate the impact of solar heating of the windward building wall at various solar elevation angles. The results show that solar heating of the canyon walls significantly modifies the airflow structure, leading to deteriorated air quality in the pedestrian zone. It is found that the highest pollutant concentrations occur near the windward (eastern) side of the canyon when it is partially (~50%) or fully (~100%) heated by solar radiation during the daytime, whereas higher concentrations near the leeward side are observed in the absence of solar heating or under partial heating from the setting sun.
Keywords
non-isothermal turbulent flow,
buoyancy,
solar radiation,
conjugate heat transfer,
street canyon,
pollution transferAuthors
| Starchenko Aleksandr V. | Tomsk State University | starch@math.tsu.ru |
| Danilkin Evgeniy A. | Tomsk State University | ugin@math.tsu.ru |
| Leshchinskiy Dmitriy V. | Tomsk State University | 360flip182@gmail.com |
Всего: 3
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