Journal
JOURNAL OF FLUID MECHANICS
Volume 779, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2015.273
Keywords
turbulent boundary layers; turbulent flows
Categories
Funding
- ONR [N00014-13-1-0174]
- NSF [CBET-1064257]
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Measurements are presented in zero-pressure-gradient, flat plate, turbulent boundary layers for Reynolds numbers ranging from Re-tau = 2600 to Re-tau = 72 500 (Re-theta = 8400-235 000). The wind tunnel facility uses pressurized air as the working fluid, and in combination with MEMS-based sensors to resolve the small scales of motion allows for a unique investigation of boundary layer flow at very high Reynolds numbers. The data include mean velocities, streamwise turbulence variances, and moments up to 10th order. The results are compared to previously reported high Reynolds number pipe flow data. For Re-tau >= 20000, both flows display a logarithmic region in the profiles of the mean velocity and all even moments, suggesting the emergence of a universal behaviour in the statistics at these high Reynolds numbers.
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