Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session G01: Nonlinear Dynamics: Turbulence & Turbulent Transition
10:35 AM–12:32 PM,
Monday, November 19, 2018
Georgia World Congress Center Room: B201
Chair: Daniel Borrero, Willamette University
Abstract ID: BAPS.2018.DFD.G01.9
Abstract: G01.00009 : A re-laminarization mechanism by sustainable thin air-films for turbulent drag reduction*
12:19 PM–12:32 PM
Reduction of hydrodynamic frictional drag through introduction of air bubbles or films at the wall region has been tried by several groups in the past. However, this method requires energy input to pump air bubbles. Previously, we have demonstrated a novel technique that can stably maintain and acoustically modulate oscillating air-films in fully turbulent boundary layer. This technique generates large drag reduction effect. We will also present a re-laminarization mechanism in the near wall region due to the oscillation of air-films. This mechanism can explain the observed large drag reduction.
*This work is supported by the Office of Naval Research under Grant No. N00014-15- 1-2479.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.G01.9
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