The spatial-temporal evolution of coherent structures in log law region of turbulent boundary layer
文献类型：期刊论文
| 作者 | Zheng XB; Jiang N
|
| 刊名 | Acta Mechanica Sinica
 |
| 出版日期 | 2015-02 |
| 卷号 | 31期号:1页码:16-24 |
| 通讯作者邮箱 | nanj@tju.edu.cn |
| 关键词 | Log law region in TBL Spatial-temporal cross-correlation Tomographic TRPIV Coherent structures Low and high speed streaks Multi-resolution wavelet decomposition |
| ISSN号 | 0567-7718 |
| 产权排序 | [Zheng, Xiao-Bo; Jiang, Nan] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China; [Jiang, Nan] Tianjin Key Lab Modern Engn Mech, Tianjin 300072, Peoples R China; [Jiang, Nan] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Jiang, N (reprint author), Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China. |
| 中文摘要 | 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. |
| 学科主题 | Engineering, Mechanical; Mechanics |
| 分类号 | 二类 |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | FLOW ; VELOCITY ; MOTIONS ; CHANNEL ; STREAKS ; PIV |
| 收录类别 | SCI ; EI ; CSCD |
| 原文出处 | http://dx.doi.org/10.1007/s10409-015-0008-6 |
| 语种 | 英语 |
| WOS记录号 | WOS:000350668900002 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/49910]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zheng XB,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.(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. |
入库方式： OAI收割
来源：力学研究所
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