Scopus
Letter: The effects of streamwise system rotation on pressure fluctuations in a turbulent channel flow
Physics of Fluids · Eylül 2018
Makale Bilgileri
DergiPhysics of Fluids
Yayın TarihiEylül 2018
Cilt / Sayfa30
Scopus ID2-s2.0-85053229106
Özet
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-Görtler-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.
Yazarlar (4)
1
Zixuan Yang
2
B. Q. Deng
ORCID: 0000-0003-1483-9694
3
Bing Chen Wang
4
L. Shen
ORCID: 0000-0003-3762-3829
Kurumlar
College of Science and Engineering
Minneapolis United States
Institute of Mechanics Chinese Academy of Sciences
Beijing China
University of Manitoba
Winnipeg Canada
Metrikler
15
Atıf
4
Yazar