| 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.
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| Source Publication | Acta Mechanica Sinica
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| 2015-02 | |
| Volume | 31Issue:1Pages:16-24 |
| ISSN | 0567-7718 |
| Abstract | The 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. |
| Keyword | Log Law Region In Tbl Spatial-temporal Cross-correlation Tomographic Trpiv Coherent Structures Low And High Speed Streaks Multi-resolution Wavelet Decomposition |
| Subject Area | Engineering, Mechanical ; Mechanics |
| DOI | 10.1007/s10409-015-0008-6 |
| URL | 查看原文 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000350668900002 |
| WOS Keyword | FLOW ; VELOCITY ; MOTIONS ; CHANNEL ; STREAKS ; PIV |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Organization | National 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 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49910 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Jiang, 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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| File Name/Size | DocType | Version | Access | License | ||
| IMCAS-J2015-063.pdf（737KB） | 开放获取 | CC BY-NC | View Download | |||
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