Statistical Characteristics of Reynolds Stress in a Turbulent Boundary Layer

The first four moments of the Reynolds stress fluctuations uυ(t), and of velocity components u(t) and υ(t) were computed using digital data processing techniques. The results show that over a moderate range of Reynolds number 1900<Reθ<6500 (based on momentum thickness) Reynolds stress fluctuations are intermittent and strongly skewed, while the u and υ fluctuation components separately are not.