A Review of Different Approaches for Boundary Shear Stress Assessment in Prismatic Channels

The stress range of shear at the channel's boundaries has a direct bearing on the flow of fluid inside the channel. Hence, understanding it is critical for defining the fluid field and velocity profile. Many engineering issues, such as design of flood control structures, energy loss calculation, and sedimentation, require shear stress computation. The proportion analysis between width and depth has strong influence over the stress distribution at shear in direct channels. Sinuosity, aspect ratio, and meander length affect shear stress distribution in meandering channels. Henceforth, the necessity of scrutinizing the methods used to determine the stress distribution in the channels. This paper analyzes the pros and cons of several methodologies that helps to estimate the allocating the stress ranges of shear via the prismatic channels. The review states that the vertical depth method, the normal depth method, the Guo and Julien method, the Prasad and Manson method, the Knight et al. method, the merged perpendicular method, and the Preston tube technique are the most popular methods that assist to estimate the distribution of boundary shear passing through the channels. This is due to the fact that these methods are straightforward, reliable, and easy to implement. After examining a number of other approaches, it was determined that the Preston tube technique was by far the most effective way in order to determine the stress range for boundary shear in all different kinds of channel sections.