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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
Source PublicationPHYSICS OF FLUIDS
2018-09-01
Volume30Issue:9Pages:91701
ISSN1070-6631
AbstractIn 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
Indexed BySCI ; EI
Language英语
WOS IDWOS:000446155900001
WOS KeywordNEAR-WALL TURBULENCE ; GORTLER VORTICES ; SIMULATIONS
WOS Research AreaMechanics ; Physics, Fluids & Plasmas
WOS SubjectMechanics ; Physics
Funding OrganizationNatural Sciences and Engineering Research Council (NSERC) of Canada
Classification一类/力学重要期刊
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77942
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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