Abstract
The main aim of this study was to investigate the flow over an ogee spillway experimentally and simulating by both ANFIS and numerical model. An experimental study was conducted in order to obtain discharges and flow depths over an ogee spillway. Discharges and flow depths of flow in physical model were measured for 16 different total heads. A computational fluid dynamics program, which uses the Reynolds averaged Navier–Stokes equations to solve fluid problems, was used to simulate the flow over ogee spillway. As artificial intelligence methods have also been used with increasing the computer technology in all engineering problems, it was also used in this study in estimating the flow over the spillway. Finally, the flow parameters observed by physical study, numerical simulation and ANFIS model were compared with each other. Nondimensional discharge and flow depth curves are used to compare the results. Numerical and ANFIS models provide a cost-efficient simulating flow over spillways. The results show that there is reasonably good agreement between the physical, numerical and ANFIS models. Numerical solution methods and ANFIS models are also useful tools to design and analyze flow over an ogee spillway.
Highlights
The ogee spillway is one of the most studied hydraulic structures because of its superb hydraulic characteristics
Discharge values and flow depths investigated by experimental study which is conducted in laboratory were compared with numerical model analyzed by Flow-3D and adaptive neuro-fuzzy inference systems (ANFIS)
Total heads and corresponding discharge values are measured for 16 different water levels at the approach channel of the ogee spillway
Summary
The ogee spillway is one of the most studied hydraulic structures because of its superb hydraulic characteristics. Ogee spillways are used for controlling the discharges and water levels in reservoir in dams. A spillway should have an economical and functional design; the hydraulic parameters such as discharge, flow depth and velocity should be known accurately. Much of information about ogee spillways is understood, any derivation from standard parameters such as flow depths and crest shape can change flow parameters. It should be known whether these small changes affect spillway performances. In the process of designing of hydraulic structures, as there are many variables it is not possible to define all parameters mathematically. Physical model studies enable it possible to avoid the inaccuracies and to find the most
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