Abstract
This study investigates the characteristics of streamline curvature and torsion in wall-bounded turbulence using DNS data from channel and boundary layer flows. The analysis includes characterizing the curvature of probability distributions as a function of the wall-normal distance. Far from the wall, the probability density function of the curvature decays with a -4 power dependence for the extreme events that are comparable with the Kolmogorov length scale. Consistent with previous studies, these large values of curvature are hypothesized to reflect the flow in the vicinity of stagnation points in the fluctuating field.
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