Reynolds-stress-constrained large-eddy simulation of wall-bounded   turbulent flows

doi:10.1017/jfm.2012.150

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	Reynolds-stress-constrained large-eddy simulation of wall-bounded turbulent flows
	Chen, Shiyi ; Xia, Zhenhua ; Pei, Suyang ; Wang, Jianchun ; Yang, Yantao ; Xiao, Zuoli ; Shi, Yipeng
刊名	journal of fluid mechanics
	2012
关键词	turbulence control turbulence modelling turbulence simulation HYBRID RANS-LES DIRECT NUMERICAL-SIMULATION SUBGRID-SCALE MODEL CIRCULAR-CYLINDER CHANNEL FLOW LAYER MODELS NUMBERS CAPABILITIES STATISTICS INTERFACE
DOI	10.1017/jfm.2012.150
英文摘要	In the traditional hybrid RANS/LES approaches for the simulation of wall-bounded fluid turbulence, such as detached-eddy simulation (DES), the whole flow domain is divided into an inner layer and an outer layer. Typically the Reynolds-averaged Navier-Stokes (RANS) equations are used for the inner layer, while large-eddy simulation (LES) is used for the outer layer. The transition from the inner-layer solution to the outer-layer solution is often problematic due to the lack of small-scale dynamics in the RANS region. In this paper, we propose to simulate the whole flow domain by large-eddy simulation while enforcing a Reynolds-stress constraint on the subgrid-scale (SGS) stress model in the inner layer. Both the algebraic eddy-viscosity model and the one-equation Spalart-Allmaras (SA) model have been used to constrain the Reynolds stress in the inner layer. In this way, we improve the LES methodology by allowing the mean flow of the inner layer to satisfy the RANS solution while small-scale dynamics is included. We validate the Reynolds-stress-constrained large-eddy simulation (RSC-LES) model by simulating three-dimensional turbulent channel flow and flow past a circular cylinder. Our model is able to predict mean velocity, turbulent stress and skin-friction coefficients more accurately in turbulent channel flow and to estimate the pressure coefficient after separation more precisely in flow past a circular cylinder compared with the pure dynamic Smagorinsky model (DSM) and DES using the same grid resolution. Furthermore, the computational cost of the RSC-LES is almost the same as that of DES.; Mechanics; Physics, Fluids & Plasmas; SCI(E); EI; 0; ARTICLE; 1-28; 703
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/315967]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Shiyi,Xia, Zhenhua,Pei, Suyang,et al. Reynolds-stress-constrained large-eddy simulation of wall-bounded turbulent flows[J]. journal of fluid mechanics,2012.
APA	Chen, Shiyi.,Xia, Zhenhua.,Pei, Suyang.,Wang, Jianchun.,Yang, Yantao.,...&Shi, Yipeng.(2012).Reynolds-stress-constrained large-eddy simulation of wall-bounded turbulent flows.journal of fluid mechanics.
MLA	Chen, Shiyi,et al."Reynolds-stress-constrained large-eddy simulation of wall-bounded turbulent flows".journal of fluid mechanics (2012).