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First Symposium on Turbulence and Shear Flow Phenomena
September, 12-15, 1999, Doubletree Resort, Santa Barbara, California, USA

DOI: 10.1615/TSFP1

REYNOLDS NUMBER DEPENDENCE AND INVARIANT ASSUMPTION IN TURBULENT BOUNDARY LAYER

pages 303-305
DOI: 10.1615/TSFP1.500
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要約

The logarithmic velocity region is considered in zero-pressure-gradient turbulent boundary layers. We propose a new definition of log-law region with using the probability profiles of stream wise velocity fluctuation. The measure called Kullback Leibler divergence is applied to distinguishing the probability profiles. The ratio of boundary layer thickness, δ, and the upper end of logarithmic region, δL, is investigated, and also the Reynolds number dependence of pdf profile is mentioned.

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