Technical note: Numerical analysis of flow profile in a stilling basin Available to Purchase

The design of a stilling basin structure involves an investigation of the river cross-section, determination of the water depth in the river, evaluation of the energy levels, definition of the downstream channel dimensions, calculation of flow depth and finally an analysis of hydraulic jump in the stilling basin. The equations that are used to determine the flow depths are non-linear and therefore required a time-consuming trial-and-error method to solve them. However, water depths may be found by utilising an iterative technique commonly referred to as the Newton–Raphson iteration technique, which is used to solve the system of non-linear equations. In this study, a computational model, based on the use of the Newton–Raphson technique to determine the flow profile of the hydraulic jump type stilling basin, is developed. A numerical example for using the computational model, depending on a prepared computer program, is presented.