Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer

@article{Stroh2016GlobalEO,
  title={Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer},
  author={Alexander Stroh and Yosuke Hasegawa and Philipp Schlatter and Bettina Frohnapfel},
  journal={Journal of Fluid Mechanics},
  year={2016},
  volume={805},
  pages={303 - 321}
}
A numerical investigation of two locally applied drag-reducing control schemes is carried out in the configuration of a spatially developing turbulent boundary layer (TBL). One control is designed to damp near-wall turbulence and the other induces constant mass flux in the wall-normal direction. Both control schemes yield similar local drag reduction rates within the control region. However, the flow development downstream of the control significantly differs: persistent drag reduction is found… 

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References

SHOWING 1-10 OF 32 REFERENCES

Active turbulence control for drag reduction in wall-bounded flows

The objective of this study is to explore concepts for active control of turbulent boundary layers leading to skin-friction reduction using the direct numerical simulation technique. Significant drag

A comparison of opposition control in turbulent boundary layer and turbulent channel flow

A comparison between classical opposition control applied in the configuration of a fully developed turbulent channel flow and applied locally in a spatially developing turbulent boundary layer is

Direct numerical simulation of spatially developing turbulent boundary layers with uniform blowing or suction

Direct numerical simulation (DNS) of spatially developing turbulent boundary layer with uniform blowing (UB) or uniform suction (US) is performed aiming at skin friction drag reduction. The Reynolds

The streamwise drag-reduction response of a boundary layer subjected to a sudden imposition of transverse oscillatory wall motion

A direct numerical simulation study is presented, which examines the response of a spatially developing boundary layer to oscillatory spanwise wall motion imposed over a limited streamwise stretch.

Reynolds number effect on turbulent drag reduction

An analytic relationship that predicts the Reynolds number effect on turbulent drag reduction by active means is developed in analogy with riblets. It is applicable to all control techniques whose

FRICTION DRAG REDUCTION THROUGH DAMPING OF THE NEAR-WALL SPANWISE VELOCITY FLUCTUATION

Flat plate drag reduction by turbulence manipulation

The major objective of the present paper is to delineate the conditions under which a turbulent boundary layer manipulated by the insertion of a passive object may lead to a lower overall drag than

Response of a spatially developing turbulent boundary layer to active control strategies in the framework of opposition control

Opposition control is a simple feedback control method which can be used to attenuate near-wall turbulence and reduce drag in wall-bounded turbulent flows [H. Choi, P. Moin, and J. Kim, J. Fluid

Effects of uniform blowing or suction from a spanwise slot on a turbulent boundary layer flow

Effects of uniform blowing or suction from a spanwise slot on a turbulent boundary layer flow are investigated using the direct numerical simulation technique. The magnitudes of blowing or suction