Boundary shear stress distributions in smooth rectangular open channel flows

摘要

This paper presents an analytical method for the computation of boundary shear stress distributions acting on the flow perimeter of prismatic open chan- nels. The approach is based on the premise that the surplus energy of any arbitrary unit volume of fluid in a three- dimensional flow channel will be trans- ported towards and dissipated at a unit area on the wetted perimeter. This leads to a concept which states that the direc- tion of energy transportation will define a minimum relative distance, φ, between the source of energy in the flow field and the boundary.