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The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer
Zheng XB; Jiang N; Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China.
Source PublicationActa Mechanica Sinica
2015-02
Volume31Issue:1Pages:16-24
ISSN0567-7718
AbstractThe spatial-temporal evolution of coherent structures (CS) is significant for turbulence control and drag reduction. Among the CS, low and high speed streak structures show typical burst phenomena. The analysis was based on a time series of three-dimensional and three-component (3D-3C) velocity fields of the flat plate turbulent boundary layer (TBL) measured by a Tomographic and Time-resolved PIV (Tomo TRPIV) system. Using multi-resolution wavelet transform and conditional sampling method, we extracted the intrinsic topologies and found that the streak structures appear in bar-like patterns. Furthermore, we seized locations and velocity information of transient CS, and then calculated the propagation velocity of CS based on spatial-temporal cross-correlation scanning. This laid a foundation for further studies on relevant dynamics properties.
KeywordLog Law Region In Tbl Spatial-temporal Cross-correlation Tomographic Trpiv Coherent Structures Low And High Speed Streaks Multi-resolution Wavelet Decomposition
Subject AreaEngineering, Mechanical ; Mechanics
DOI10.1007/s10409-015-0008-6
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000350668900002
WOS KeywordFLOW ; VELOCITY ; MOTIONS ; CHANNEL ; STREAKS ; PIV
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [11332006, 11272233, 11411130150] ; National Basic Research Programm of China [2012CB720101]
Classification二类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49910
Collection非线性力学国家重点实验室
Corresponding AuthorJiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China.
Recommended Citation
GB/T 7714
Zheng XB,Jiang N,Jiang, N . The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer[J]. Acta Mechanica Sinica,2015,31(1):16-24.
APA Zheng XB,Jiang N,&Jiang, N .(2015).The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer.Acta Mechanica Sinica,31(1),16-24.
MLA Zheng XB,et al."The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer".Acta Mechanica Sinica 31.1(2015):16-24.
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