Effect of fast rotation on pressure fluctuations and Taylor–Görtler-like vortices in channel flows

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	Effect of fast rotation on pressure fluctuations and Taylor–Görtler-like vortices in channel flows
	杨子轩 ; Deng BQ ; Wang B-C
会议录名称	11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
	2019
会议名称	International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
会议日期	Jul 30 2019 → Aug 2 2019
会议地点	Southampton, United Kingdom
摘要	In this paper, the pressure field is decomposed into rotation-induced and convection-induced components to analyze the effects of streamwise system rotation on the pressure fluctuations and the transport of Reynolds stresses. We show analytically 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, and facilitates the growth of streamwise-elongated Taylor–Görtler-like (TGL) vortices. A new set of transport equations in the spectral space is derived to study the budget balance of velocity-spectrum tensor at different wavelengths. The mechanisms underlying the generation of TGL vortices are explained through the analyses of the budget balance of Reynolds stresses and energy spectra. © 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved.
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85112
专题	非线性力学国家重点实验室
作者单位	1.State Key Laboratory of Nonlinear Mechanics Institute of Mechanics, Chinese Academy of Science, Beijing, 100190, China 2.St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, 55414, United States 3.Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 5V6, Canada
推荐引用方式 GB/T 7714	杨子轩,Deng BQ,Wang B-C. Effect of fast rotation on pressure fluctuations and Taylor–Görtler-like vortices in channel flows[C]11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019,2019.