Journal
BUILDING AND ENVIRONMENT
Volume 207, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2021.108412
Keywords
Aerodynamic parameters; Non-uniform buildings; Morphological parameters; Wind tunnel experiment
Funding
- National Natural Science Foundation of China [52008131, 51708151, 51878208]
- China Postdoctoral Science Foundation [2019T120274]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2020049]
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The study conducted wind tunnel experiments to investigate the aerodynamic characteristics of complex buildings in urban areas, and revealed a relationship pattern between drag coefficient and morphological parameters, leading to the development of a surface roughness model based on aerodynamic parameters of non-uniform buildings.
The implementation of morphometric evaluations of complex buildings in urban areas is essential for urban canopy models. There are two main reasons for this: the impossibility of conducting a micrometeorological evaluation of a building that is still in the design phase and the difficulty of estimating the roughness height of an urban area containing complex buildings using an anemometric method. This study used wind tunnel experiments to investigate the effects of the planar area, frontal area, shape, and layout of buildings on their aerodynamic characteristics. The results indicated that the curves showing the relationships between the buildings drag coefficient, C-d, and the four morphological parameters had similar patterns, with C-d = b.exp (-x(c)/a).x(d). The influences on C-d of both the shape and layout parameters showed peaks, as did the planar and frontal densities. A surface roughness model based on the morphometric evaluations of the aerodynamic parameters of non-uniform buildings was developed.
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