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Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow
Yang ZX(杨子轩); Deng BQ; Wang BC; Shen L
2018-09-01
发表期刊PHYSICS OF FLUIDS
卷号30期号:9页码:91701
ISSN1070-6631
摘要In this letter, we report the modulating effects of streamwise system rotation on both the amplitude and the wavenumber of pressure fluctuations in a plane channel flow. The analysis of the pressure field is conducted based on a set of comprehensive direct numerical simulation data of six rotation numbers. It is observed that high pressure fluctuation regions collocate with the Taylor-Gortler-like (TGL) vortex cores. By decomposing the pressure field into rotation-induced and convection-induced parts, it is observed that the rotation-induced part dominates the total pressure fluctuations and facilitates the growth of TGL vortices. Furthermore, through a spectral analysis, it is discovered that the system rotation acts as a "linear amplifier," which converts high-wavenumber low-amplitude streamwise vorticity fluctuations into low-wavenumber high-amplitude pressure fluctuations. Published by AIP Publishing.
DOI10.1063/1.5048800
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000446155900001
关键词[WOS]NEAR-WALL TURBULENCE ; GORTLER VORTICES ; SIMULATIONS
WOS研究方向Mechanics ; Physics, Fluids & Plasmas
WOS类目Mechanics ; Physics
项目资助者Natural Sciences and Engineering Research Council (NSERC) of Canada
论文分区一类/力学重要期刊
力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77942
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA
3.Univ Minnesota, St Anthony Falls Lab, Minneapolis, MN 55455 USA
4.Univ Manitoba, Dept Mech Engn, Winnipeg, MB R3T 5V6, Canada
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Yang ZX,Deng BQ,Wang BC,et al. Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow[J]. PHYSICS OF FLUIDS,2018,30(9):91701.
APA 杨子轩,Deng BQ,Wang BC,&Shen L.(2018).Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow.PHYSICS OF FLUIDS,30(9),91701.
MLA 杨子轩,et al."Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow".PHYSICS OF FLUIDS 30.9(2018):91701.
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