Towards an entropy-based detached-eddy simulation

	Towards an entropy-based detached-eddy simulation
	Zhao R(赵瑞); Yan C(阎超); Li XL(李新亮); Kong WX; Zhao, R (reprint author), Beijing Univ Aeronaut & Astronaut, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China.
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2013-10
卷号	56 期号:10 页码:1970-1980
ISSN	1674-7348
摘要	A concept of entropy increment ratio (sI") is introduced for compressible turbulence simulation through a series of direct numerical simulations (DNS). sI" represents the dissipation rate per unit mechanical energy with the benefit of independence of freestream Mach numbers. Based on this feature, we construct the shielding function f (s) to describe the boundary layer region and propose an entropy-based detached-eddy simulation method (SDES). This approach follows the spirit of delayed detached-eddy simulation (DDES) proposed by Spalart et al. in 2005, but it exhibits much better behavior after their performances are compared in the following flows, namely, pure attached flow with thick boundary layer (a supersonic flat-plate flow with high Reynolds number), fully separated flow (the supersonic base flow), and separated-reattached flow (the supersonic cavity-ramp flow). The Reynolds-averaged Navier-Stokes (RANS) resolved region is reliably preserved and the modeled stress depletion (MSD) phenomenon which is inherent in DES and DDES is partly alleviated. Moreover, this new hybrid strategy is simple and general, making it applicable to other models related to the boundary layer predictions.
关键词	Hybrid Rans/les Detached-eddy Simulation Turbulence Compressible Flows Entropy
学科领域	湍流 ; 计算流体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000324643000022
项目资助者	National Basic Research Program of China [2009CB724104]; Innovation Foundation of BUAA for PhD Graduates; Academic New Artist Award of BUAA for PhD Graduates
课题组名称	LHD可压缩湍流
论文分区	二类/Q3
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47493
专题	高温气体动力学国家重点实验室
通讯作者	Zhao, R (reprint author), Beijing Univ Aeronaut & Astronaut, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China.
推荐引用方式 GB/T 7714	Zhao R,Yan C,Li XL,et al. Towards an entropy-based detached-eddy simulation[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2013,56,10,:1970-1980.
APA	Zhao R,Yan C,Li XL,Kong WX,&Zhao, R .(2013).Towards an entropy-based detached-eddy simulation.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,56(10),1970-1980.
MLA	Zhao R,et al."Towards an entropy-based detached-eddy simulation".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 56.10(2013):1970-1980.

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