scholarly journals Non-sinusoidal wall oscillation for drag reduction

PAMM ◽  
2012 ◽  
Vol 12 (1) ◽  
pp. 565-566
Author(s):  
Andrea Cimarelli ◽  
Bettina Frohnapfel ◽  
Yosuke Hasegawa ◽  
Elisabetta De Angelis ◽  
Maurizio Quadrio
Keyword(s):  
Drag Reduction ◽  
Wall Oscillation ◽  
Sinusoidal Wall

Drag reduction by spanwise wall oscillation in wall-bounded turbulent flows

AIAA Journal ◽  
2002 ◽  
Vol 40 ◽  
pp. 842-850 ◽  
Author(s):  
J.-I. Choi ◽  
C.-X. Xu ◽  
H. J. Sung
Keyword(s):  
Drag Reduction ◽  
Turbulent Flows ◽  
Wall Oscillation

Drag Reduction by Spanwise Wall Oscillation in Wall-Bounded Turbulent Flows

AIAA Journal ◽  
2002 ◽  
Vol 40 (5) ◽  
pp. 842-850 ◽  
Author(s):  
Jung-Il Choi ◽  
Chun-Xiao Xu ◽  
Hyung Jin Sung
Keyword(s):  
Drag Reduction ◽  
Turbulent Flows ◽  
Wall Oscillation

scholarly journals On the Mechanism of Drag Reduction of Near-Wall Turbulence by Wall Oscillation.

1997 ◽  
Vol 40 (4) ◽  
pp. 558-566 ◽  
Author(s):  
Yutaka MIYAKE ◽  
Koichi TSUJIMOTO ◽  
Masayuki TAKAHASHI
Keyword(s):  
Drag Reduction ◽  
Wall Turbulence ◽  
Wall Oscillation ◽  
Near Wall Turbulence ◽  
Near Wall

Drag reduction of turbulent pipe flows by circular-wall oscillation

1998 ◽  
Vol 10 (1) ◽  
pp. 7-9 ◽  
Author(s):  
Kwing-So Choi ◽  
Mark Graham
Keyword(s):  
Drag Reduction ◽  
Pipe Flows ◽  
Wall Oscillation

Wall Oscillation Induced Drag Reduction of Turbulent Boundary Layers

2016 ◽  
pp. 161-165 ◽  
Author(s):  
Martin Skote ◽  
Maneesh Mishra ◽  
Prabal Singh Negi ◽  
Yanhua Wu ◽  
Hsiao Mun Lee ◽  
...  
Keyword(s):  
Drag Reduction ◽  
Boundary Layers ◽  
Turbulent Boundary Layers ◽  
Induced Drag ◽  
Wall Oscillation

Turbulent Boundary Layer Control by Wall Oscillations

2005 ◽  
Author(s):  
Dongmei Zhou ◽  
Kenneth S. Ball
Keyword(s):  
Reynolds Number ◽  
Drag Reduction ◽  
Stokes Equations ◽  
Numerical Data ◽  
Shear Velocity ◽  
Wall Turbulence ◽  
Navier Stokes ◽  
Constant Flow Rate ◽  
Wall Oscillation ◽  
Flow Configurations

The objective of this paper is to examine the effect and the effectiveness of wall oscillation as a control scheme of drag reduction in order to better understand the mechanism of drag reduction. Two flow configurations were considered: constant flow rate and constant mean pressure gradient. The Navier-Stokes equations were solved using Fourier-Chebyshev spectral methods and the oscillation in sinusoidal form was enforced on the walls through boundary conditions for the spanwise velocity component. Results to be shown included the effects of oscillation frequency, amplitude, oscillation orientation, and peak wall speed at Reynolds number of 180 based on wall-shear velocity and channel half-width as well as the Reynolds number dependency s in both flow configurations. Comparison of effectiveness made between these two flow configurations has showed similarities as well as differences. Drag reduction as a function of peak wall speed was compared with both experimental and numerical data and the agreement was good in the trend and in the quantity. Comparison between these two flow configurations in the transient response to the sudden start of wall oscillation, turbulence statistics, and instantaneous flow fields was detailed and differences were clearly shown. Analysis and comparison are allowed to shed some light on the way that oscillations interact with wall turbulence.

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