Hideki Kikumoto*, Royzo Ooka, Mengtao Han, Keigo Nakajima. Consistency of mean wind speed in pedestrian wind environment analyses: Mathematical consideration and a case study using large-eddy simulation[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 173: 91–99. (SCI检索)
发布时间：2021-03-10
点击次数：
- 论文类型：
- 期刊论文
- 发表刊物：
- Journal of Wind Engineering and Industrial Aerodynamics
- 收录刊物：
- SCI
- 学科门类：
- 工学
- 一级学科：
- 土木工程
- 文献类型：
- J
- 卷号：
- 173
- 页面范围：
- 91-99
- 关键字：
- Pedestrian-level wind; Wind speed; Wind tunnel testing; CFD; Large-eddy simulation
- DOI码：
- 10.1016/j.jweia.2017.11.021
- 发表时间：
- 2017-11-22
- 影响因子：
- 2.739
- 摘要：
- When analyzing pedestrian wind environments, the evaluated mean wind speed sometimes varies in its definition depending on the method used, such as in wind tunnel experiments (WTEs) and in computational fluid dynamics (CFD) simulations. First, this study defined three types of mean wind speed (mean-vector speed, mean speed, and effective speed) and investigated their interrelations mathematically. Second, discrepancies between the three mean wind speeds were predicted quantitatively by conducting a large-eddy simulation of flow around a single building model in an urban boundary layer. Near the ground surface, the differences between the mean wind speeds became larger in the recirculation flow near the building's windward corners and in its wake. However, in the region where the maximum wind speeds occurred, all the mean wind speeds were similar. Finally, we presented a method to estimate mean speed, which is commonly evaluated in WTEs, using information that can be obtained from CFD using turbulence models based on Reynolds-averaged Navier–Stokes equations. By modeling the probability distribution of the instantaneous velocity in a multivariate Gaussian distribution, we demonstrated its ability to estimate mean speed with high accuracy.
- 备注：
- 中科院2区，JCR1区
- 上一条：Mengtao Han, Royzo Ooka, Hideki Kikumoto, Keigo Nakashima. Comparison between lattice Boltzmann method and finite volume method for LES in the built environment[C]//International Workshop on Wind-Related Disasters and Mitigation (WRDM). Sendai, Japan, 2017.
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