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The spanwise spectra in wall-bounded turbulence
Wang HP; Wang SZ(王士召); He GW(何国威)
发表期刊ACTA MECHANICA SINICA
2018-06-01
卷号34期号:3页码:452-461
ISSN0567-7718
摘要

The pre-multiplied spanwise energy spectra of streamwise velocity fluctuations are investigated in this paper. Two distinct spectral peaks in the spanwise spectra are observed in low-Reynolds-number wall-bounded turbulence. The spectra are calculated from direct numerical simulation (DNS) of turbulent channel flows and zero-pressure-gradient boundary layer flows. These two peaks locate in the near-wall and outer regions and are referred to as the inner peak and the outer peak, respectively. This result implies that the streamwise velocity fluctuations can be separated into large and small scales in the spanwise direction even though the friction Reynolds number can be as low as 1000. The properties of the inner and outer peaks in the spanwise spectra are analyzed. The locations of the inner peak are invariant over a range of Reynolds numbers. However, the locations of the outer peak are associated with the Reynolds number, which are much higher than those of the outer peak of the pre-multiplied streamwise energy spectra of the streamwise velocity.

关键词Wall-bounded Turbulence Streamwise/spanwise Spectra Scale Separation Inner/outer Peak
DOI10.1007/s10409-017-0731-2
收录类别SCI ; EI ; CSCD
语种英语
WOS记录号WOS:000432609500004
关键词[WOS]Large-scale ; Channel Flow ; Layers ; Generation ; Database ; Region ; Model
WOS研究方向Engineering ; Mechanics
WOS类目Engineering, Mechanical ; Mechanics
项目资助者National Natural Science Foundation of China(11302238 ; Strategic Priority Research Program(XDB22040104) ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(QYZDJ-SSW-SYS002) ; National Basic Research Program of China (973 Program)(2013CB834100) ; 11232011 ; 11572331 ; 11490551)
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77490
专题非线性力学国家重点实验室
推荐引用方式
GB/T 7714
Wang HP,Wang SZ,He GW. The spanwise spectra in wall-bounded turbulence[J]. ACTA MECHANICA SINICA,2018,34(3):452-461.
APA Wang HP,Wang SZ,&He GW.(2018).The spanwise spectra in wall-bounded turbulence.ACTA MECHANICA SINICA,34(3),452-461.
MLA Wang HP,et al."The spanwise spectra in wall-bounded turbulence".ACTA MECHANICA SINICA 34.3(2018):452-461.
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