Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows

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	Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows
	Yu ZP(于长平); Xiao ZL; Li XL(李新亮)
刊名	PHYSICS OF FLUIDS
	2017-03-01
卷号	29 期号:3
ISSN号	1070-6631
中文摘要	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.
类目[WOS]	Mechanics ; Physics, Fluids & Plasmas
研究领域[WOS]	Mechanics ; Physics
关键词[WOS]	ATMOSPHERIC BOUNDARY-LAYER ; CHANNEL FLOW ; KOLMOGOROV CONSTANT ; REYNOLDS-NUMBER ; UNIVERSALITY ; STATISTICS ; WALL ; JET
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000397874300030
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60586]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Yu ZP,Xiao ZL,Li XL. Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows[J]. PHYSICS OF FLUIDS,2017,29(3).
APA	于长平,Xiao ZL,&李新亮.(2017).Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows.PHYSICS OF FLUIDS,29(3).
MLA	于长平,et al."Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows".PHYSICS OF FLUIDS 29.3(2017).