Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 08, 2021 - November 10, 2021
We performed direct numerical simulations (DNSs) of turbulent boundary layer flows with the wall injection of Newtonian and viscoelastic (FENE-P) fluids in order to distinguish the effects of drag reduction due to the high-speed wall injection and viscoelastic effect. The high-speed wall injection within the viscous sublayer parallel to the wall was simulated by imposing uniform velocities, which were 1, 2, and 3 times larger than the free stream velocity. We clarified the effect of wall injection of Newtonian and viscoelastic fluids via the investigation of streamwise variations in the drag reduction ratio and mean velocity profiles.
