Three-dimensional conditional structure of a high-Reynolds-number turbulent boundary layer

N Hutchins; JP Monty; B Ganapathisubramani; HCH Ng; I Marusic

Journal article

Three-dimensional conditional structure of a high-Reynolds-number turbulent boundary layer

N Hutchins, JP Monty, B Ganapathisubramani, HCH Ng, I Marusic

Journal of Fluid Mechanics | Published : 2011

DOI: 10.1017/S0022112010006245

Abstract

An array of surface hot-film shear-stress sensors together with a traversing hot-wire probe is used to identify the conditional structure associated with a large-scale skin-friction event in a high-Reynolds-number turbulent boundary layer. It is found that the large-scale skin-friction events convect at a velocity that is much faster than the local mean in the near-wall region (the convection velocity for large-scale skin-friction fluctuations is found to be close to the local mean at the midpoint of the logarithmic region). Instantaneous shear-stress data indicate the presence of large-scale structures at the wall that are comparable in scale and arrangement to the superstructure events tha..

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University of Melbourne Researchers

Nicholas Hutchins Author

Jason Monty Author

Ivan Marusic Author

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Grants

Awarded by Royal Society

Funding Acknowledgements

N.H., J.P.M. and I.M. acknowledge support from the Australian Research Council through grants DP0663499, FF0668703, DP0984577 and DP1093585. B. G. acknowledges the Royal Society for the travel grant that enabled his visit to the University of Melbourne. We also wish to thank the reviewers for their helpful comments.