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Title:
Towards an entropy-based detached-eddy simulation
Author: Zhao R(赵瑞); Yan C(阎超); Li XL(李新亮); Kong WX
Source: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Issued Date: 2013-10
Volume: 56, Issue:10, Pages:1970-1980
Abstract: 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.
Keyword: hybrid RANS/LES ; detached-eddy simulation ; turbulence ; compressible flows ; entropy
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Zhao, R (reprint author), Beijing Univ Aeronaut & Astronaut, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China.
Correspondent Email: zhaorui@ase.buaa.edu.cn
Related URLs: 查看原文
WOS ID: WOS:000324643000022
ISSN: 1674-7348
Rank: [Zhao Rui; Yan Chao; Kong WeiXuan] Beijing Univ Aeronaut & Astronaut, Natl Lab Computat Fluid Dynam, Beijing 100191, Peoples R China; [Li XinLiang] Chinese Acad Sci, Inst Mech, Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
Subject: 流体力学::湍流;流体力学::计算流体力学
Department: LHD可压缩湍流
Classification: 二类/Q3
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/47493
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:
Zhao R,Yan C,Li XL,et al. Towards an entropy-based detached-eddy simulation[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2013-10-01,56(10):1970-1980.
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