Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow

doi:10.1063/1.5048800

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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
刊名	PHYSICS OF FLUIDS
	2018-09-01
卷号	30 期号:9 页码:91701
ISSN号	1070-6631
DOI	10.1063/1.5048800
英文摘要	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.
分类号	一类/力学重要期刊
URL标识	查看原文
WOS关键词	NEAR-WALL TURBULENCE ; GORTLER VORTICES ; SIMULATIONS
WOS研究方向	Mechanics ; Physics, Fluids & Plasmas
语种	英语
WOS记录号	WOS:000446155900001
资助机构	Natural Sciences and Engineering Research Council (NSERC) of Canada
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/77942]
专题	力学研究所_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
推荐引用方式 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.