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Antisymmetric quadrupole mode of coherent structures in wall-bounded turbulence
Tian HP; Yang SQ; Cheng L; Wang Y; Jiang N(姜楠)
Source PublicationTHEORETICAL & APPLIED MECHANICS LETTERS
2013-09-10
Volume3Issue:5Pages:14-052002
ISSN2095-0349
AbstractExperiments were conducted in a water tunnel by tomographic time-resolved particle image velocimetry (Tomo-TRPIV). The Reynolds number Reθ is 2 460 on the base of momentum thickness. According to the physical mechanism of the stretch and compression of multi-scale vortex structures in the wall-bounded turbulence, the topological characteristics of turbulence statistics in logarithmic layer were illustrated by local-averaged velocity structure function. During coherent structures bursting, results reveal that the topological structures of velocity gradients, velocity strain rates and vorticities behave as antisymmetric quadrupole modes. A three-layer antisymmetric quadrupole vortex packet confirms that there is a tight relationship between the outer layer and the near-wall layer.
KeywordWall-bounded Turbulence Antisymmetric Quadrupole Mode Tomo-trpiv Vortex Packet Coherent Structure
Subject Area湍流
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47606
Collection非线性力学国家重点实验室
Corresponding AuthorJiang N(姜楠)
Recommended Citation
GB/T 7714
Tian HP,Yang SQ,Cheng L,et al. Antisymmetric quadrupole mode of coherent structures in wall-bounded turbulence[J]. THEORETICAL & APPLIED MECHANICS LETTERS,2013,3(5):14-052002.
APA Tian HP,Yang SQ,Cheng L,Wang Y,&姜楠.(2013).Antisymmetric quadrupole mode of coherent structures in wall-bounded turbulence.THEORETICAL & APPLIED MECHANICS LETTERS,3(5),14-052002.
MLA Tian HP,et al."Antisymmetric quadrupole mode of coherent structures in wall-bounded turbulence".THEORETICAL & APPLIED MECHANICS LETTERS 3.5(2013):14-052002.
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