Recent investigations by Monty et al. [J. Fluid Mech. 632, 431 (2009)] showed that important modal differences exist between channels/pipes and boundary layers, mainly in the largest energetic scales. In addition, Mathis et al. [J. Fluid Mech. 628, 311 (2009)] recently reported and quantified a nonlinear scale interaction in zero-pressure gradient turbulent boundary layers, whereby the large-scale motion amplitude modulates the small-scale motions. In this study, a comparison of this modulation effect of the streamwise velocity component is undertaken for all three flows for matched Reynolds number and measurement conditions. Despite the different large-scale phenomena in these internal and external wall-bounded flows, the results show that their amplitude modulation influence remains invariant in the inner region with some differences appearing in the outer region.
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November 2009
Letter|
November 24 2009
Comparison of large-scale amplitude modulation in turbulent boundary layers, pipes, and channel flows
Romain Mathis;
Romain Mathis
Department of Mechanical Engineering,
University of Melbourne
, Victoria 3010, Australia
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Jason P. Monty;
Jason P. Monty
Department of Mechanical Engineering,
University of Melbourne
, Victoria 3010, Australia
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Nicholas Hutchins;
Nicholas Hutchins
Department of Mechanical Engineering,
University of Melbourne
, Victoria 3010, Australia
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Ivan Marusic
Ivan Marusic
Department of Mechanical Engineering,
University of Melbourne
, Victoria 3010, Australia
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Physics of Fluids 21, 111703 (2009)
Article history
Received:
August 16 2009
Accepted:
October 26 2009
Citation
Romain Mathis, Jason P. Monty, Nicholas Hutchins, Ivan Marusic; Comparison of large-scale amplitude modulation in turbulent boundary layers, pipes, and channel flows. Physics of Fluids 1 November 2009; 21 (11): 111703. https://doi.org/10.1063/1.3267726
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