The relationship between the velocity skewness and the amplitude modulation of the small scale by the large scale in turbulent boundary layers
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چکیده
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منابع مشابه
XXII ICTAM, 25–29 August 2008, Adelaide, Australia ON THE RELATIONSHIP BETWEEN LARGE- AND SMALL-SCALE MOTIONS IN TURBULENT BOUNDARY LAYERS
The relationship between largeand small-scale motions remains a poorly understood process in wall-bounded turbulence. Investigation performed by Hutchins and Marusic [3] in a high Reynolds number turbulent boundary layer has recently revealed a possible influence of large-scale log region motions on the small-scale near-wall cycle, akin to a pure amplitude modulation. For this study we build up...
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Recent investigations into wall-bounded turbulent flows have shown a nonlinear scale interaction, whereby the largescale motion amplitude modulates the small-scale structures (Hutchins & Marusic, 2007b). Mathis et al. (2009) developed a scheme to quantify the degree of modulation using a decoupling procedure, based on the Hilbert transformation applied to the filtered small-scale component of t...
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