Turbulent boundary layer flow subject to streamwise oscillation of spanwise wall-velocity
M Skote - Physics of Fluids, 2011 - pubs.aip.org
Direct numerical simulations have been performed to study the effect of a stationary
distribution of spanwise wall-velocity that oscillates in the streamwise direction on a
turbulent boundary layer. For the first time, a spatially developing flow with this type of
forcing is studied. The part of the boundary layer which flows over the alternating wall-
velocity section is greatly affected with a drag reduction close to 50% which exhibits an
oscillatory distribution with a wavenumber which is twice that of the imposed wall-velocity …
distribution of spanwise wall-velocity that oscillates in the streamwise direction on a
turbulent boundary layer. For the first time, a spatially developing flow with this type of
forcing is studied. The part of the boundary layer which flows over the alternating wall-
velocity section is greatly affected with a drag reduction close to 50% which exhibits an
oscillatory distribution with a wavenumber which is twice that of the imposed wall-velocity …
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