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Scaling of the bursting frequency in turbulent boundary layers

Published online by Cambridge University Press:  20 April 2006

R. F. Blackwelder  and
J. H. Haritonidis
R. F. Blackwelder
Affiliation:
Department of Aerospace Engineering, University of Southern California, Los Angeles, California
J. H. Haritonidis
Affiliation:
Department of Aerospace Engineering, University of Southern California, Los Angeles, California Present address: Massachusetts Institute of Technology, Dept of Aeronautics and Astronautics, 37-461, Cambridge, MA 02139.
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Abstract

The bursting frequency in turbulent boundary layers has been measured over the Reynolds-number range 103 < U∞/ν < 104. When scaled with the variables appropriate for the wall region, the non-dimensional frequency was constant independent of Reynolds number. A strong effect of the sensor size was noted on the measured bursting frequency. Only sensors having a spatial scale less than twenty viscous lengthscales were free from spatial-averaging effects and yielded consistent results. The spatial-resolution problem was apparently the reason for erroneous results reported in the past.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 132 , July 1983 , pp. 87 - 103
Copyright
© 1983 Cambridge University Press

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