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Title:
Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows
Author: Yu ZP(于长平); Xiao ZL; Li XL(李新亮)
Source: PHYSICS OF FLUIDS
Issued Date: 2017-03-01
Volume: 29, Issue:3
Abstract: The proportionality between the subgrid-scale (SGS) drain rate of kinetic energy and the viscous dissipation rate of the resolved motions is studied a priori by filtering a given fully resolved field and evaluating a generic form of the hypothesized energy spectrum. The ratio of the SGS drain to the resolved dissipation on which a balance condition for the SGS dissipation across an arbitrary grid scale is founded is shown to be independent of the turbulence Reynolds number and can be described by a function in terms of the averaged mesh Reynolds number. Such a balance condition can serve as a physical constraint in the SGS modeling to account for the scale effects of the model coefficient(s). Scale-adaptive dynamic Smagorinsky-Lilly model and mixed nonlinear model are formulated for large-eddy simulation of transitional and/or turbulent flows in such away that the constraint is satisfied. The newly proposed scale-adaptive dynamic SGS models are validated in simulations of homogeneous isotropic turbulence and turbulent channel flow and prove to be superior over traditional dynamic SGS models. Published by AIP Publishing.
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1063/1.4977089
DOC Type: Article
WOS Subject: Mechanics ; Physics, Fluids & Plasmas
WOS Subject Extended: Mechanics ; Physics
WOS Keyword Plus: ATMOSPHERIC BOUNDARY-LAYER ; CHANNEL FLOW ; KOLMOGOROV CONSTANT ; REYNOLDS-NUMBER ; UNIVERSALITY ; STATISTICS ; WALL ; JET
WOS ID: WOS:000397874300030
ISSN: 1070-6631
Funder: National Natural Science Foundation of China(11472278 ; National Key Research and Development Program of China(2016YFA0401200) ; 11372007 ; 91441103 ; 11372330)
Department: LHD可压缩湍流
First Institution (Yes or Not): true
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60586
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
Yu ZP,Xiao ZL,Li XL. Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows[J]. PHYSICS OF FLUIDS,2017-03-01,29(3).
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