Research on Wind Environment around Residential Buildings with Different Planning and Design Factors

Abstract

In this work, a field survey is performed in 309 residential building clusters in South China to obtain the basic characters of urban planning and design of residential buildings in this area. Based on it, the basic model of residential building clusters in this area is established, and CFD method is used to simulate the outdoor wind environment around residential buildings with different planning and design factors. The influence of building coverage ratio on the pedestrian spatial mean velocity ratio under 16 wind directions is found to be more remarkable than those of the floor area ratio and building layout. 10% increase of the building coverage ratio results in 0.1 linear decrease of the mean velocity ratio under 16 wind directions at the pedestrian level.

Assessment of Outdoor Pedestrian Ventilation Performance While Controlling Building Array Scale and Density

“…Under the constant floor area ratio, layouts with various plan area densities were studied to evaluate the ventilation [46]. Both the floor area density and plan area density were ranged to study their impacts on ventilation [47,48]. Correlations between five morphological parameters, the frontal area density, plan area density, area-weighted mean building height, volume density, and non-dimensional mean velocity at the pedestrian level, are evaluated, and simple models are obtained using linear regression analysis [49].…”

“…Moreover, the building density has an upper limit in Chinese cities, and in order to realize greater commercial profits, building developers generally attempt to design building arrays as close to the required building-density limit as possible. Therefore, the density often cannot change in a large range [38,47,57] of building arrays. The idealized array tends to underestimate or overestimate real densities, leading to the frequent misrepresentation of the urban planning density [58].…”

Influence of Waterside Buildings’ Layout on Wind Environment and the Relation with Design Based on a Case Study of the She Kou Residential District

“…Wind tunnel experiment is traditionally used in the wind environment study [20] , however, computational fluid dynamics (CFD) are frequently used recently due to convenient operation as well as low cost [20][21] . In studying the interaction between buildings and physical spaces with wind environment, authored works have done by using CFD simulations [10][11]14,[22][23][24] . They proved that CFD model simulation is helpful in the initial stage to outline a "qualitative impression" of the wind environment, in which CFD were conducted to analyze the meso/micro wind environment at the urban scale and air polluted outcomes.…”