Effects of arbitrary directional system rotation on turbulent channel flow

2004 ◽  
Vol 16 (4) ◽  
pp. 979-990 ◽  
Author(s):  
Haibin Wu ◽  
Nobuhide Kasagi
Keyword(s):  
Channel Flow ◽  
Turbulent Channel Flow ◽  
System Rotation

scholarly journals Structure of Turbulent Channel Flow under Spanwise System Rotation

2007 ◽  
Vol 2 (3) ◽  
pp. 547-557 ◽  
Author(s):  
Oaki IIDA ◽  
Kenji MIYAMOTO ◽  
Yasutaka NAGANO
Keyword(s):  
Channel Flow ◽  
Turbulent Channel Flow ◽  
System Rotation

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

2018 ◽  
Vol 30 (9) ◽  
pp. 091701 ◽  
Author(s):  
Zixuan Yang ◽  
Bing-Qing Deng ◽  
Bing-Chen Wang ◽  
Lian Shen
Keyword(s):  
Channel Flow ◽  
Pressure Fluctuations ◽  
Turbulent Channel Flow ◽  
System Rotation

Fully Developed Turbulent Channel Flow Subject to System Rotation

2003 ◽  
Author(s):  
Yvan Maciel ◽  
Donald Picard ◽  
Guorong Yan ◽  
Christian Gleyzes ◽  
Guy Dumas
Keyword(s):  
Channel Flow ◽  
Turbulent Channel Flow ◽  
System Rotation

scholarly journals Statistics and structure of spanwise rotating turbulent channel flow at moderate Reynolds numbers

2017 ◽  
Vol 828 ◽  
pp. 424-458 ◽  
Author(s):  
Geert Brethouwer
Keyword(s):  
Reynolds Number ◽  
Channel Flow ◽  
Large Scale ◽  
Linear Part ◽  
Turbulent Channel Flow ◽  
Streamwise Velocity ◽  
Reynolds Stresses ◽  
System Rotation ◽  
The Mean ◽  
Spanwise Rotation

A study of fully developed plane turbulent channel flow subject to spanwise system rotation through direct numerical simulations is presented. In order to study both the influence of the Reynolds number and spanwise rotation on channel flow, the Reynolds number $Re=U_{b}h/\unicode[STIX]{x1D708}$ is varied from a low 3000 to a moderate 31 600 and the rotation number $Ro=2\unicode[STIX]{x1D6FA}h/U_{b}$ is varied from 0 to 2.7, where $U_{b}$ is the mean bulk velocity, $h$ the channel half-gap, $\unicode[STIX]{x1D708}$ the viscosity and $\unicode[STIX]{x1D6FA}$ the system rotation rate. The mean streamwise velocity profile displays also at higher $Re$ a characteristic linear part with a slope near to $2\unicode[STIX]{x1D6FA}$, and a corresponding linear part in the profiles of the production and dissipation rate of turbulent kinetic energy appears. With increasing $Ro$, a distinct unstable side with large spanwise and wall-normal Reynolds stresses and a stable side with much weaker turbulence develops in the channel. The flow starts to relaminarize on the stable side of the channel and persisting turbulent–laminar patterns appear at higher $Re$. If $Ro$ is further increased, the flow on the stable side becomes laminar-like while at yet higher $Ro$ the whole flow relaminarizes, although the calm periods might be disrupted by repeating bursts of turbulence, as explained by Brethouwer (Phys. Rev. Fluids, vol. 1, 2016, 054404). The influence of the Reynolds number is considerable, in particular on the stable side of the channel where velocity fluctuations are stronger and the flow relaminarizes less quickly at higher $Re$. Visualizations and statistics show that, at $Ro=0.15$ and 0.45, large-scale structures and large counter-rotating streamwise roll cells develop on the unstable side. These become less noticeable and eventually vanish when $Ro$ rises, especially at higher $Re$. At high $Ro$, the largest energetic structures are larger at lower $Re$.

Sign in / Sign up

Export Citation Format

Share Document