Non-Uniform Open Channel Flows Study Using Three-Dimensional Turbulence Measurements

We conducted an experimental study to investigate the three-dimensional (3D) turbulence characteristics, including 3D turbulence intensities and Reynolds stresses, of different non-uniform open channel flows over the smooth bed. First, the methods used to process the experimental data were outlined and reviewed; then, the experimental instrument and conditions were discussed; finally, the analyses on various experimental data were performed. The analyses of our data set showed that the measured non-uniform flows present a slightly higher von Karman constant. than the commonly proposed value, while the commonly used wake law integration constant B-r and wake parameter. presented similar characteristics as those in the literature. The findings from our measured data further contribute to the 3D flow turbulence characteristics study, which are useful for the non-uniform flows investigation that fewer studies had been focused on in comparison with the uniform flows study.