Prediction of Lagrangian dispersion of fluid particles in isotropic turbulent flows using large-eddy simulation method

doi:10.1007/s00707-017-1877-5

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	Prediction of Lagrangian dispersion of fluid particles in isotropic turbulent flows using large-eddy simulation method
	Zhou ZD(周志登); Chen JC(陈进财); Jin GD(晋国栋); Jin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
刊名	ACTA MECHANICA
	2017-09-01
卷号	228 期号:9 页码:3203-3222
ISSN号	0001-5970
DOI	10.1007/s00707-017-1877-5
文献子类	Article
英文摘要	The single-, two- and multi-particle dispersions in isotropic turbulent flows are investigated using the direct numerical simulation (DNS), filtered DNS (FDNS) and large-eddy simulation (LES) with a spectral eddy viscosity subgrid scale (SGS) model. The contributions of filtering operation and SGS model to the dispersions are separately studied by comparing the statistics obtained from the three methods. The missing SGS motions in LES can be observed to significantly hinder two-particle and four-particle dispersions if the initial separations are less than or comparable to the filter width. A theoretical analysis of the non-monotonic behavior at short time of the one-time, two-point Lagrangian velocity correlation functions with large initial separations based on the Taylor expansion and the Kolmogorov similarity theory is derived, and the Reynolds number effect on the performance of the spectral eddy viscosity SGS model is also investigated. The results show that the SGS model used performs better with increasing Reynolds numbers. It is concluded that the particle SGS model is needed to be developed to correctly capture the Lagrangian two- and multi-point dispersion statistics of fluid particles.
分类号	二类
URL标识	查看原文
WOS关键词	SPACE-TIME CORRELATIONS ; STOCHASTIC-MODEL ; HOMOGENEOUS TURBULENCE ; 2-PARTICLE DISPERSION ; RELATIVE DIFFUSION ; INERTIAL PARTICLES ; STATISTICS ; VELOCITY ; MOTION ; PAIRS
WOS研究方向	Mechanics
语种	英语
WOS记录号	WOS:000408224600016
资助机构	National Natural Science Foundation of China(11472277 ; Science Challenge Project(TZ2016001) ; Strategic Priority Research Program, CAS(XDB22040104) ; Key Research Program of Frontier Sciences, CAS(QYZDJ-SSW-SYS002) ; 973 Program of China(2013CB834100) ; 11572331 ; 11232011)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/70052]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Jin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Zhou ZD,Chen JC,Jin GD,et al. Prediction of Lagrangian dispersion of fluid particles in isotropic turbulent flows using large-eddy simulation method[J]. ACTA MECHANICA,2017,228(9):3203-3222.
APA	周志登,陈进财,晋国栋,&Jin, GD .(2017).Prediction of Lagrangian dispersion of fluid particles in isotropic turbulent flows using large-eddy simulation method.ACTA MECHANICA,228(9),3203-3222.
MLA	周志登,et al."Prediction of Lagrangian dispersion of fluid particles in isotropic turbulent flows using large-eddy simulation method".ACTA MECHANICA 228.9(2017):3203-3222.