Abstract
This paper reports measurements on the behavior of ejection-and sweep-like motions of fluid in the near—wall region of a turbulent boundary layer in a water channel. The measurements were performed over a smooth as well as a drag—reducing grooved surface. The results of the signal analysis are shown to be consistent with the flow visualization studies of Blokland and Krishna Prasad (1984, 1986) and the experimental work of Choi (1989). It is further shown that the grooved surface manifests a modest level of manipulating capability over the specific motions associated with ejections and sweeps.
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© 1991 Springer Science+Business Media Dordrecht
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Schwarz-Van Manen, A.D., Hoogsteen, R., Stouthart, J.C., Prasad, K.K., Nieuwstadt, F.T.M. (1991). Coherent structures over a smooth and a triangular riblet drag reducing surface. In: Choi, KS. (eds) Recent Developments in Turbulence Management. Fluid Mechanics and Its Applications, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3526-9_5
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DOI: https://doi.org/10.1007/978-94-011-3526-9_5
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