IMECH-IR  > 流固耦合系统力学重点实验室
New interpretation of specific sign of Reynolds stress in the boundary layer on a flat plate
Lin LM(林黎明); Wu YX(吴应湘)
Source PublicationTheoretical & Applied Mechanics Letters
2018-11
Volume8Issue:6Pages:372-377
ISSN2095-0349
Abstract

The specific sign of Reynolds stress in the boundary layer on a flat plate at zero incidence is newly interpreted in present paper based on the theory of vortex-induced vortex. It avoids some problems appeared in a traditional explanation, on the basis of relationship between mean and fluctuating flows due to the transport of momentum. Through the analysis of local flow field in the immediate neighborhood of wall, the characteristics of Reynolds stress are identified through introducing turbulence-induced small-scale streamwise eddies above the flat plate. The positive Reynolds stress is theoretically verified. And such new interpretation illustrates that the generation of Reynolds stress, as well as fluctuating velocity, is intrinsically independent of the mean flow. But its specific sign would be determined by the mean flow due to the inertial forces. Other features, such as the intensity relationship among three components of fluctuating velocity, are also presented.

KeywordReynolds Shear Stress Sign Boundary Layer Flat Plate Turbulence
Indexed ByCSCD
Language英语
CSCD IDCSCD:6407075
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78190
Collection流固耦合系统力学重点实验室
Corresponding AuthorLin LM(林黎明)
Recommended Citation
GB/T 7714
Lin LM,Wu YX. New interpretation of specific sign of Reynolds stress in the boundary layer on a flat plate[J]. Theoretical & Applied Mechanics Letters,2018,8(6):372-377.
APA Lin LM,&Wu YX.(2018).New interpretation of specific sign of Reynolds stress in the boundary layer on a flat plate.Theoretical & Applied Mechanics Letters,8(6),372-377.
MLA Lin LM,et al."New interpretation of specific sign of Reynolds stress in the boundary layer on a flat plate".Theoretical & Applied Mechanics Letters 8.6(2018):372-377.
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