Estimation of Boundary Shear Stresses of Uniform Flow in Rectangular Open Channel

Abstract

The distribution of the shear stress was same both laminar flow and turbulent flow in the case of one-dimensional uniform flow that the velocity varies only in a vertical direction. In this study, the shear stresses of laminar flow in the case of two-dimensional uniform flow, that the velocity varies in both vertical and transverse directions, were obtained theoretically in a rectangular open channel. In order to examine to what extent the solutions were conformed to two-dimensional turbulent flow, the comparisons between the theoretical solutions of boundary shear stress and the past experimental results of them in smooth open channel turbulent flow were done. As a result, it was shown that the mean shear stress on the side wall and channel bed accord with the experimental results well.