Research on the Outdoor Wind Environment of Buildings under the Influence of Hills: The Beigushan Hill in Nanjing

Abstract

In urban planning and architectural design, mountains in complex terrains significantly impact buildings’ outdoor wind environments, but research on hill-building interactions remains limited. Taking Beigushan Hill in Nanjing as the research object, this study uses CFD simulation to comprehensively explore the effects of factors like mountain height, building height, and building canyons on outdoor average wind speeds around buildings. It finds that Beigushan’s unique terrain forms a high-speed zone on its leeward side, with a hilltop speed-up effect significantly increasing wind speeds around leeward buildings. The interplay of various factors jointly shapes the wind environment. The results provide a scientific basis for architectural design and planning under complex terrain conditions.