Abstract
As the most densely populated area, the city has a series of problems such as ventilation and urban wind energy evaluation. However, the previous research on how to accurately simulate actual urban wind fields is limited, which does not consider the effect of atmospheric stratification. Meanwhile, the efficiency of urban building modeling is low. Therefore, the urban wind environment is explored in this study considering atmospheric stratification, in which LES (large eddy simulation) is carried out for a single building and multiple buildings. Besides, an indirect modeling method is proposed. Taking actual urban buildings as examples, CFD (computational fluid dynamics) simulation of an actual urban wind environment is carried out based on this method. The results indicate that this method is reliable for numerical simulation of actual urban wind environment, which only takes 5–8 min to model the urban buildings within an area of 1 km × 1 km.
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