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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.
Source PublicationACTA MECHANICA
2017-09-01
Volume228Issue:9Pages:3203-3222
ISSN0001-5970
AbstractThe 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.
DOI10.1007/s00707-017-1877-5
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000408224600016
WOS KeywordSPACE-TIME CORRELATIONS ; STOCHASTIC-MODEL ; HOMOGENEOUS TURBULENCE ; 2-PARTICLE DISPERSION ; RELATIVE DIFFUSION ; INERTIAL PARTICLES ; STATISTICS ; VELOCITY ; MOTION ; PAIRS
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationNational 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)
DepartmentLNM湍流
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70052
Collection非线性力学国家重点实验室
Corresponding AuthorJin, GD (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
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.
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