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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.
AbstractA 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.
KeywordHybrid Rans/les Detached-eddy Simulation Turbulence Compressible Flows Entropy
Subject Area湍流 ; 计算流体力学
Indexed BySCI ; EI
WOS IDWOS:000324643000022
Funding OrganizationNational Basic Research Program of China [2009CB724104]; Innovation Foundation of BUAA for PhD Graduates; Academic New Artist Award of BUAA for PhD Graduates
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorZhao, R (reprint author), Beijing Univ Aeronaut & Astronaut, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China.
Recommended Citation
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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