scholarly journals Direct Numerical Simulation in a Lid-Driven Cubical Cavity at High Reynolds Number by a Chebyshev Spectral Method

2006 ◽  
Vol 27 (1-3) ◽  
pp. 335-345 ◽  
Author(s):  
Emmanuel Leriche
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Direct Numerical Simulation ◽  
Spectral Method ◽  
High Reynolds Number ◽  
Chebyshev Spectral Method ◽  
High Reynolds ◽  
Cubical Cavity

Direct Numerical Simulation of Turbulent Channel Flow With Streamwise System-Rotation

2015 ◽  
Author(s):  
Masayoshi Okamoto
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Direct Numerical Simulation ◽  
High Reynolds Number ◽  
Turbulent Channel Flow ◽  
Quadrant Analysis ◽  
Mean Velocity ◽  
Reynolds Number Flow ◽  
High Reynolds ◽  
Low Speed Streaks

The direct numerical simulation (DNS) of the fully developed turbulent channel flows rotating along the streamwise direction with several rotation parameters and two Reynolds numbers is performed. The bulk mean velocity decreases with increasing the rotation parameter, but the decrement is weakened in the high Reynolds number case. Applying the second-kind Chebyshev polynomial expansion into the mean spanwise velocity, the second mode coefficient, which becomes large in the strong rotation, is greatly influenced by the Reynolds number effect. Due to the streamwise rotation, the derivative and integral length scales obtained from the streamwise two-point correlation are extended. From viewpoints of the quadrant analysis, spectral one and instantaneous visualization, the high correlation among three fluctuating velocity components appears and the low-speed streaks are accumulated in the strong rotation and high Reynolds number flow.

0507 Peta-Scale Direct Numerical Simulation of Wall Turbulence at High Reynolds Number by K computer

2013 ◽  
Vol 2013 (0) ◽  
pp. _0507-01_-_0507-02_
Author(s):  
Naoya FUKUSHIMA ◽  
Kazuaki TOKUMARU ◽  
Hiroya MAMORI ◽  
Kaoru IWAMOTO ◽  
Koji FUKAGATA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Direct Numerical Simulation ◽  
High Reynolds Number ◽  
Wall Turbulence ◽  
High Reynolds
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