Impact of Roof Shape on Micro-environment in Street Canyons by Numerical Simulation

TANG Jie; ZHANG Shuangxi; SHAO Zhenfeng; ZOU Chenyang; YI Xuchong

doi:10.13203/j.whugis20180457

Volume 45 Issue 6

Jun. 2020

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Geomatics and Information Science of Wuhan University > 2020 > 45(6): 888-894. > DOI: 10.13203/j.whugis20180457

TANG Jie, ZHANG Shuangxi, SHAO Zhenfeng, ZOU Chenyang, YI Xuchong. Impact of Roof Shape on Micro-environment in Street Canyons by Numerical Simulation[J]. Geomatics and Information Science of Wuhan University, 2020, 45(6): 888-894. DOI: 10.13203/j.whugis20180457

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Impact of Roof Shape on Micro-environment in Street Canyons by Numerical Simulation

1.
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2.
Key Laboratory of Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China
3.
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China

Funds: The National Natural Science Foundation of China (41874169, U1939204); Wuhan Multi‐factor Urban Geological Survey Demonstration Project.

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Author Bio:
TANG Jie, postgraduate, specializes in numerical simulation of urban geophysics.jietang@whu.edu.cn
Corresponding author:
ZHANG Shuangxi, PhD, professor. E-mail:shxzhang@sgg.whu.edu.cn
Received Date: April 23, 2019
Published Date: June 04, 2020

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Abstract

Abstract

With the rapid development of urbanization, the changes of urban micro-environment caused by the underlying surface are becoming obvious. The influence of roof structure on the single physical field (such as wind field or temperature field) in the urban micro-environment has been emphasized, while the coupling of two physical fields has been neglected. This paper introduces a model to study the effect of building roof shape on urban micro-environment and the model includes two sub-models, that is computational fluid dynamics (CFD) model and radiation (RAD) model. The two-dimensional numerical model was constructed with four roof-shaped structures and three typical solar incidence angles to simulate the micro-environment in street canyons. Then, the mathematical-physical model was validated by comparing the results of wind tunnel experiment. The results show that the model can simulate urban micro-environment. Moreover, flat roof buildings are more conducive to mitigating the urban heat island effect, and the canyon heat island effect formed by triangular roofs is the strongest, while the downward roof buildings are bad for the heat diffusion on the windward side.
- urban micro-environment,
- street canyon,
- numerical simulation,
- building roof shape

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Impact of Roof Shape on Micro-environment in Street Canyons by Numerical Simulation

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