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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
Source Publication11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
2019
Conference NameInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
Conference DateJul 30 2019 → Aug 2 2019
Conference PlaceSouthampton, United Kingdom
AbstractIn 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.
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/85112
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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.
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