Contribution of flow topology to the kinetic energy flux in hypersonic turbulent boundary layer
文献类型:期刊论文
作者 | Xu, Dehao3; Wang, Jianchun2; Yu, Changping1; Li, Xinliang1; Chen, Shiyi2,3; Li XL(李新亮); Yu ZP(于长平) |
刊名 | PHYSICS OF FLUIDS |
出版日期 | 2022-04-01 |
卷号 | 34期号:4页码:23 |
ISSN号 | 1070-6631 |
DOI | 10.1063/5.0089126 |
通讯作者 | Wang, Jianchun(wangjc@sustech.edu.cn) ; Chen, Shiyi(chensy@sustech.edu.cn) |
英文摘要 | The contribution of various flow topologies to the subgrid-scale (SGS) flux of kinetic energy in hypersonic turbulent boundary layer for different Mach numbers and wall temperature ratios is investigated by direct numerical simulation. In the far-wall region (approximately y(+) = y/delta(nu) > 50, where y is the wall-normal location and delta(nu) is the viscous length scale), the volume fractions of flow topologies unstable focus/compressing (UFC) and stable focus/stretching (SFS) increase with the increase in filter width, resulting in the dominance of UFC and SFS in the inertial range; while in the near-wall region, the volume fractions of flow topologies unstable/saddle/saddle (UN/S/S), stable node/ saddle/saddle (SN/S/S), stable focus/compressing (SFC), and unstable focus/stretching (UFS) increase with the increase in filter width, leading to the majority of UN/S/S and SN/S/S in the inertial range. In the inertial range, the SGS flux of kinetic energy is mainly contributed by UFC and SFS far from the wall (approximately y(+) > 50) and is primarily contributed by UN/S/S and SN/S/S near the wall. The wall temperature has a significant effect on the contributions of various flow topologies in the near-wall region. As the wall temperature decreases, the contributions by SN/S/S and SFC to the SGS kinetic energy flux increase in the compression region, and those by UN/S/S and UFS increase in the expansion region. Moreover, the direct transfer of fluctuating kinetic energy from large scales to small scales is mainly characterized by UN/S/S, SFS, and SFC in the compression region, while the reverse transfer of fluctuating kinetic energy is primarily characterized by UFC, SN/S/S, and UFS in the expansion region. |
WOS关键词 | DIRECT NUMERICAL-SIMULATION ; VELOCITY-GRADIENT TENSOR ; FINE-SCALE MOTIONS ; REYNOLDS-NUMBER ; COMPRESSIBILITY ; DYNAMICS ; INVARIANTS ; STRAIN ; EVOLUTION ; SHEAR |
资助项目 | 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 |
WOS研究方向 | Mechanics ; Physics |
语种 | 英语 |
WOS记录号 | WOS:000788720700024 |
资助机构 | 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 |
源URL | [http://dspace.imech.ac.cn/handle/311007/89084] |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
通讯作者 | Wang, Jianchun; Chen, Shiyi |
作者单位 | 1.Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China 3.Peking Univ, State Key Lab Turbulence & Complex Syst, Coll Engn, Beijing 100871, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Dehao,Wang, Jianchun,Yu, Changping,et al. Contribution of flow topology to the kinetic energy flux in hypersonic turbulent boundary layer[J]. PHYSICS OF FLUIDS,2022,34(4):23. |
APA | Xu, Dehao.,Wang, Jianchun.,Yu, Changping.,Li, Xinliang.,Chen, Shiyi.,...&于长平.(2022).Contribution of flow topology to the kinetic energy flux in hypersonic turbulent boundary layer.PHYSICS OF FLUIDS,34(4),23. |
MLA | Xu, Dehao,et al."Contribution of flow topology to the kinetic energy flux in hypersonic turbulent boundary layer".PHYSICS OF FLUIDS 34.4(2022):23. |
入库方式: OAI收割
来源:力学研究所
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