Turbulent oscillatory boundary layers at high Reynolds numbers
作者： B. L. Jensen , B. M. Sumer , J. Fredsøe
DOI: 10.1017/S0022112089002302
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摘要: This study deals with turbulent oscillatory boundary-layer flows over both smooth and rough beds. The free-stream flow is a purely oscillating sinusoidal velocity variation. Mean turbulence properties were measured mainly in two directions, namely the streamwise direction perpendicular to bed. Some measurements made also transverse direction. carried out up Re = 6 × 106 mirror-shine bed beds various values of parameter a/ks covering range from approximately 400 3700, being amplitude ks Nikuradse's equivalent sand roughness. For smooth-bed flows, effect discussed greater detail. It demonstrated that change markedly Re. rough-bed examined, at large (O(103)) combination
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