4.7 Article

Comparison of large-scale amplitude modulation in turbulent boundary layers, pipes, and channel flows

期刊

PHYSICS OF FLUIDS
卷 21, 期 11, 页码 -

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AIP Publishing
DOI: 10.1063/1.3267726

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资金

  1. Australian Research Council [DP0663499, FF0668703, DP0984577]
  2. Australian Research Council [DP0984577, DP0663499, FF0668703] Funding Source: Australian Research Council

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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 larp-e-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 file outer region. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3267726] C

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