Large-Eddy-simulation analysis of airflows and strong wind hazards in urban areas
Large-Eddy-simulation analysis of airflows and strong wind hazards in urban areas
复制标题
城市地区气流及强风灾害的大涡模拟分析
DOI:
10.1016/j.uclim.2020.100625
复制
发表时间:
2020
期刊:
影响因子:
6.4
通讯作者:
Takemi T
中科院分区:
文献类型:
--
作者:
Takemi T
Understanding the characteristics of urban airflows with complex geometrical features is very important from viewpoints of assessing strong wind hazards in the region. This study investigated turbulent airflows and strong wind hazards in an urban area by conducting large-eddy simulations (LESs) with explicit representations of buildings and structures. A business district, including historical architectures, of Kyoto City was chosen. The sensitivity experiments with realistic and idealized building arrangements indicated that the actual, complicated arrangement of buildings as well as the building height variability would enhance an unsteady nature of airflows in urban canopy. An analysis of strong wind hazards under a typhoon condition shows that sustained winds are stronger along streamwise-oriented major streets and over open spaces while instantaneous winds become stronger especially within areas with a mixture of high-rise buildings embedded in low-rise building areas/open spaces. It was indicated that wind gustiness increases with the decrease in building plane-area index. The analysis suggested that both the building height variability and the complex arrangement of buildings are considered to enhance the gustiness of surface winds. This study demonstrated that an LES model is practically useful for assessing the strong wind hazards in urban areas.
登录
查看更多内容
影响因子:
4.3
作者:
Giometto, M. G.;Christen, A.;Parlange, M. B.
通讯作者:
Parlange, M. B.
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
B. Han;Seung;Jong‐Jin Baik;Junho Park;K. Kwak
通讯作者:
K. Kwak
影响因子:
1.9
作者:
Yoshida Toshiya;Takemi Tetsuya
通讯作者:
Takemi Tetsuya
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
I. Takayabu;H. Kanamaru;K. Dairaku;R. Benestad;H. Storch;J. Christensen
通讯作者:
J. Christensen
DOI:
--
发表时间:
2009
期刊:
Proc of ICUC-7(7th Int. Conf. on Urban Climate) (CD-ROM)
影响因子:
--
作者:
Zaki Sheikh Salim;S.A.;Kikuchi;Y.;Yamaguchi;M.;Hagishima;A.;Tanimoto;J.
通讯作者:
J.