| Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer | |
Xu, Dehao1; Wang, Jianchun2; Yu ZP(于长平)3 ; Li XL(李新亮)3; Chen, Shiyi1,2
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| Corresponding Author | Xu, Dehao([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2022-05-01 | |
| Volume | 34Issue:5Pages:24 |
| ISSN | 1070-6631 |
| Abstract | The effects of the wall temperature and local compressibility on the small-scale structures, local flow topology, and enstrophy production in the hypersonic turbulent boundary layer are numerically investigated. The colder wall temperature significantly enhances the unstable topologies and non-focal topologies near the wall, mainly due to stronger compressibility and more sheet-like structures. The eigenvalue decomposition of the strain rate tensor is introduced to investigate the mechanism of the enstrophy production and small-scale structures. It is shown that in the near wall region, the enstrophy production is mainly governed by the intermediate eigenvalue of strain-rate tensor through flow topologies unstable node/saddle/saddle (UN/S/S), stable focus/stretching (SFS), unstable focus/stretching, and unstable node/unstable node/unstable node, while the enstrophy destruction is primarily contributed by the intermediate eigenvalue through flow topologies stable node/saddle/saddle, stable focus/compressing (SFC), and stable node/stable node/stable node. Moreover, in the far wall region, the third eigenvalue in flow topology SFS and the intermediate eigenvalue in UN/S/S make major contributions to the enstrophy production, while the first eigenvalue in flow topologies unstable focus/compressing and SFC, and the intermediate eigenvalue in SFC mainly lead to the enstrophy destruction.& nbsp;Published under an exclusive license by AIP Publishing. |
| DOI | 10.1063/5.0091731 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000797897600003 |
| WOS Keyword | DIRECT NUMERICAL-SIMULATION ; VELOCITY-GRADIENT TENSOR ; FLOW TOPOLOGY ; DYNAMICS ; MOTIONS ; DERIVATIVES ; VORTICITY ; EVOLUTION ; DNS |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | NSFC Basic Science Center Program[11988102] ; National Natural Science Foundation of China (NSFC)[91952104] ; National Natural Science Foundation of China (NSFC)[92052301] ; National Natural Science Foundation of China (NSFC)[12172161] ; National Natural Science Foundation of China (NSFC)[91752201] ; Technology and Innovation Commission of Shenzhen Municipality[KQTD20180411143441009] ; Technology and Innovation Commission of Shenzhen Municipality[JCYJ20170412151759222] ; Department of Science and Technology of Guangdong Province[2019B21203001] ; Center for Computational Science and Engineering of Southern University of Science and Technology |
| Funding Organization | NSFC Basic Science Center Program ; National Natural Science Foundation of China (NSFC) ; Technology and Innovation Commission of Shenzhen Municipality ; Department of Science and Technology of Guangdong Province ; Center for Computational Science and Engineering of Southern University of Science and Technology |
| Classification | 一类/力学重要期刊 |
| Ranking | 3 |
| Contributor | Xu, Dehao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89403 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China; 2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, Dehao,Wang, Jianchun,Yu ZP,et al. Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer[J]. PHYSICS OF FLUIDS,2022,34,5,:24.Rp_Au:Xu, Dehao |
| APA | Xu, Dehao,Wang, Jianchun,于长平,李新亮,&Chen, Shiyi.(2022).Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer.PHYSICS OF FLUIDS,34(5),24. |
| MLA | Xu, Dehao,et al."Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer".PHYSICS OF FLUIDS 34.5(2022):24. |
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| Jp2022FA384.pdf（15991KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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