Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
The direct numerical simulation (DNS) of the fully developed turbulent Couette-Poiseuille flows with uniform injection at the bottom wall is performed in this study. The mean-streamwise-velocity profile shifts upward from the standard wall-law owing to the injection effect and the flow becomes stable up to about 20% in comparison with no-injection flow. The estimations of the three-dimensional two-point correlation and two-time Reynolds shear stress show that the low-speed streak is expanded by the strong injection. In the instantaneous visualization, the large low-speed streaks are found out and the vortex structures are activated in the region where no low-speed streak appears.
