4.6 Article

CFD-based analysis of urban haze-fog dispersion-A preliminary study

期刊

BUILDING SIMULATION
卷 14, 期 2, 页码 365-375

出版社

TSINGHUA UNIV PRESS
DOI: 10.1007/s12273-020-0641-2

关键词

air pollution residual time; urban environment; high-rise building; wind direction; computational fluid dynamics

资金

  1. special fund of the State Key Joint Laboratory of Environment Simulation and Pollution Control (2015), Tsinghua University, China [15K09ESPCT]

向作者/读者索取更多资源

This paper proposes a CFD model for evaluating local haze-fog dispersion, using APRT as a measure of ventilation effectiveness. The study found that the orientation of building groups has a significant impact on APRT, and future urban designs can reduce APRT by adjusting orientation.
This paper proposes a computational fluid dynamics (CFD) model, along with dimensionless quantitative assessment standard-air pollution residual time (APRT) for the evaluation of local haze-fog (HF) dispersion in a built environment. A low APRT value ensures good ventilation. A building group model that comprises high-rise business building, mid-rise office buildings, low-mid-rise residential buildings (at the center of the building group), a mid-rise recreational center, and a local road (open terrain), was scaled down (1:100) to simulate the HF dispersion process. The orientation of the building group was numerically modified to generate a wind incidence normal to the high-rise building, mid-rise buildings, recreational center, and road. The results showed that the orientation of the building group largely determines the APRT. The most favorable orientation can reduce APRT by more than 50%. Our results strongly suggested that in order to reduce the consequential negative effect of air pollution, future urban designs should undergo a comprehensive ventilation assessment to ensure a low APRT value.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据