| 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.
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| Source Publication | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 2013-10 | |
| Volume | 56Issue:10Pages:1970-1980 |
| ISSN | 1674-7348 |
| 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 |
| Subject Area | 湍流 ; 计算流体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000324643000022 |
| Funding Organization | National Basic Research Program of China [2009CB724104]; Innovation Foundation of BUAA for PhD Graduates; Academic New Artist Award of BUAA for PhD Graduates |
| Department | LHD可压缩湍流 |
| Classification | 二类/Q3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47493 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Zhao, 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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