IMECH-IR  > 非线性力学国家重点实验室
Effects of the Reynolds number on a scale-similarity model of Lagrangian velocity correlations in isotropic turbulent flows
Shi ZY(史召宇); Chen JC(陈进财); Jin GD(晋国栋)
发表期刊APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
2018-11-01
卷号39期号:11页码:1605-1616
ISSN0253-4827
摘要A scale-similarity model of a two-point two-time Lagrangian velocity correlation (LVC) was originally developed for the relative dispersion of tracer particles in isotropic turbulent flows (HE, G. W., JIN, G. D., and ZHAO, X. Scale-similarity model for Lagrangian velocity correlations in isotropic and stationary turbulence. Physical Review E, 80, 066313 (2009)). The model can be expressed as a two-point Eulerian space correlation and the dispersion velocity V. The dispersion velocity denotes the rate at which one moving particle departs from another fixed particle. This paper numerically validates the robustness of the scale-similarity model at high Taylor micro-scale Reynolds numbers up to 373, which are much higher than the original values (R-lambda = 66, 102). The effect of the Reynolds number on the dispersion velocity in the scale-similarity model is carefully investigated. The results show that the scale-similarity model is more accurate at higher Reynolds numbers because the two-point Lagrangian velocity correlations with different initial spatial separations collapse into a universal form compared with a combination of the initial separation and the temporal separation via the dispersion velocity. Moreover, the dispersion velocity V normalized by the Kolmogorov velocity V eta equivalent to eta/T-eta in which eta and T-eta are the Kolmogorov space and time scales, respectively, scales with the Reynolds number R-lambda as V/V-eta proportional to R-lambda(1.39) obtained from the numerical data.
关键词turbulent mixing relative dispersion Lagrangian velocity correlation scale-similarity model dispersion velocity Reynolds number effect
DOI10.1007/s10483-018-2387-6
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000451482500005
关键词[WOS]DIRECT NUMERICAL SIMULATIONS ; TIME CORRELATIONS ; DISPERSION ; PARTICLES ; STATISTICS ; DIFFUSION
WOS研究方向Mathematics, Applied ; Mechanics
WOS类目Mathematics ; Mechanics
论文分区二类/Q1
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78140
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Sun Yat Sen Univ, Sch Engn, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式
GB/T 7714
Shi ZY,Chen JC,Jin GD. Effects of the Reynolds number on a scale-similarity model of Lagrangian velocity correlations in isotropic turbulent flows[J]. APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION,2018,39(11):1605-1616.
APA 史召宇,陈进财,&晋国栋.(2018).Effects of the Reynolds number on a scale-similarity model of Lagrangian velocity correlations in isotropic turbulent flows.APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION,39(11),1605-1616.
MLA 史召宇,et al."Effects of the Reynolds number on a scale-similarity model of Lagrangian velocity correlations in isotropic turbulent flows".APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION 39.11(2018):1605-1616.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[史召宇]的文章
[陈进财]的文章
[晋国栋]的文章
百度学术
百度学术中相似的文章
[史召宇]的文章
[陈进财]的文章
[晋国栋]的文章
必应学术
必应学术中相似的文章
[史召宇]的文章
[陈进财]的文章
[晋国栋]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。