干旱区生态环境知识资源中心(Arid): Spatial Variation of Statistical and Spectral Properties of the Stream Wise and Wall-Normal Velocity Fluctuations in the Near-Neutral Atmospheric Surface Layer

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DOI	10.1007/s10546-019-00465-0
	Spatial Variation of Statistical and Spectral Properties of the Stream Wise and Wall-Normal Velocity Fluctuations in the Near-Neutral Atmospheric Surface Layer
	Mei, A.; Bo, T. L.
通讯作者	Bo, T. L.
来源期刊	BOUNDARY-LAYER METEOROLOGY
ISSN	0006-8314
EISSN	1573-1472
出版年	2019
卷号	173 期号:2 页码:223-242
英文摘要	Based on high-quality near-neutral atmospheric-surface-layer (ASL) data obtained from an observational site located in flat desert and existing experimental results for a friction Reynolds number Re-tau < 10(6), the spatial variation of the streamwise and wall-normal velocity statistics and the Re-tau dependence of the scaling parameters are investigated. The near-neutral ASL results show that, for Re-tau > 10(6), the change of the second-order statistics of the streamwise velocity component with height is consistent with the experimental results for Re-tau < 10(6), while the second-order statistics of the wall-normal velocity component increase linearly with height. In combination with the experimental results for Re-tau < 10(6), the variation of the slope of streamwise turbulence intensity with height and the variation of the slope and intercept of the wall-normal turbulence intensity with height are quantified to reveal that both the streamwise and wall-normal velocity variances follow a generalized logarithmic law, with the distribution of the streamwise and wall-normal velocity components satisfying sub- and super-Gaussian distributions. Spectral analysis shows that the variation of the wavenumber corresponding to the pre-multiplied streamwise and wall-normal spectra peaks with the ratio z/delta obeys the form kx delta=a(delta/z)b and the value of a may have a Reynolds-number dependence, while for the pre-multiplied wall-normal spectra, a=2.2 +/- 0.09. The von Karman constant, the Townsend-Perry constant and other parameters also display a weak Reynolds-number dependence.
英文关键词	Atmospheric surface layer Atmospheric boundary layer High Reynolds number Semi-logarithmic behaviour Wavenumbers
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000487899100004
WOS关键词	LARGE-SCALE MOTIONS ; TURBULENT-BOUNDARY-LAYERS ; SMOOTH ; REGION ; ROUGH ; SIMILARITY ; INTENSITY ; CONSTANT ; FLOW
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
EI主题词	2019-11-01
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310396
作者单位	Lanzhou Univ, Dept Mech, Key Lab Mech Western Disaster & Environm, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Mei, A.,Bo, T. L.. Spatial Variation of Statistical and Spectral Properties of the Stream Wise and Wall-Normal Velocity Fluctuations in the Near-Neutral Atmospheric Surface Layer[J]. 兰州大学,2019,173(2):223-242.
APA	Mei, A.,&Bo, T. L..(2019).Spatial Variation of Statistical and Spectral Properties of the Stream Wise and Wall-Normal Velocity Fluctuations in the Near-Neutral Atmospheric Surface Layer.BOUNDARY-LAYER METEOROLOGY,173(2),223-242.
MLA	Mei, A.,et al."Spatial Variation of Statistical and Spectral Properties of the Stream Wise and Wall-Normal Velocity Fluctuations in the Near-Neutral Atmospheric Surface Layer".BOUNDARY-LAYER METEOROLOGY 173.2(2019):223-242.