Gusty wind disturbances and large-scale turbulent structures in the neutral atmospheric su

Gusty wind disturbances and large-scale turbulent structures in the neutral atmospheric surface layer

HaiHua Gu; GuoHua Wang; Wei Zhu; XiaoJing Zheng

【期刊名称】《《中国科学》》 【年(卷),期】2019(000)011

【摘要】This study analyzes the contribution of large-scale turbulent structures, including very large-scale and large-scale motions, to the streamwise turbulent kinetic energy and momentum flux in comparison with the contribution of the gusty wind disturbances based on the high-quality data obtained from the field measurements conducted in the near-neutral surface layer. The results of this study denote that the gusty wind disturbances contain only a portion of the energy contained in very large-scale motions and do not contain any of the information contained in large-scale motions. The amount of lost contributions to the streamwise turbulent kinetic energy and momentum flux increases linearly with the friction velocity, eventually becoming 53% and 67%,respectively.

This

indicates

that

large-scale

turbulent

structures(very large-scale motions and large-scale motions) better describe the coherent structures in the atmospheric surface layer when compared with the gusty wind disturbances. 【总页数】7页(P.102-108)

【关键词】atmospheric surface layer; gusty wind disturbances; large-

scale motions

【作者】HaiHua Gu; GuoHua Wang; Wei Zhu; XiaoJing Zheng

【作者单位】Key Laboratory of Mechanics on Disaster and Environment in Western China Lanzhou University Lanzhou 730000 China; Research Center for Applied Mechanics School of Mechano-Electronic Engineering Xidian University Xi’an 710071 China 【正文语种】中文 【中图分类】P425 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_science-china-information-sciences_thesis/0201276108555.html 【相关文献】

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