Side weirs are used in open channels to control flood and the flow passing through it. Discharge capacity is one of the crucial hydraulic parameters of side weirs. The aim of this study is to determine the effect of the intended dimensionless parameters on predicting the discharge coefficient of triangular labyrinth side weir. MAPE, RMSE, and R2 statistic indexes have been used to assess the ac...

A labyrinth weir allows for higher discharge capacity than conventional linear weirs, especially at low hydraulic heads. In fact, this is an alternative the design or rehabilitation of spillways. It can even be used as a strategy in problems related to dam safety. sequential method based on optimal geometric parameters and results flow analysis using Computational Fluid Dynamics experimental st...

In this study, the effect of channel-bed slope and non-prismatic converging channel on discharge coefficient labyrinth weirs is numerically investigated utilizing FLOW-3D model. Numerical simulation results show that modifying weir through both methods improves coefficient. Among selected bed slopes wall, β=4% angle θ=10° yielded highest For a ratio HT/P=0.1, (HT: flow height, P: height) rate f...

Abstract The compound labyrinth weir is a new type of that considered good applicable choice for increasing the capacity discharge. flow over complex problem because behavior three-dimensional. present study aims to simulate into critical regions cannot be observed when using an experimental test. computational fluid dynamics (CFD) programme was utilised implement sensitive analysis this purpos...

Abstract Climate change has caused the inefficient operation of a significant number old weirs to pass large discharges. Therefore, this study aims increase discharge capacity labyrinth weir. A new approach was proposed by modifying weir structure. The data obtained from quarter-round crest and different sidewall angles ranging 8 35°. conventional used for comparison. results showed that percen...

Abstract Weirs are one of the most common hydraulic structures used in water engineering projects. In this research, a group method data handling (GMDH) was developed to estimate energy dissipation flow passing over labyrinth weirs with triangular and trapezoidal plans. To compare performance model other types soft computing models, multilayer perceptron neural network (MLPNN) developed. The di...

The piano key (PK) weir has advanced over the labyrinth to increase discharge capacity. Piano weirs exhibit nonlinear flow behavior and are easy place on existing spillway or newly constructed dam with less base area. Various investigators given equations calculate coefficient for free submerged conditions. study focuses reviewing impacts of PK geometry coefficient, including length height, ups...

Abstract Labyrinth weirs are commonly used to increase the capacity of existing spillways and provide more efficient for new dams due their high specific discharge compared linear weir. In present study, an experimental numerical investigation was conducted improve rectangular labyrinth weir performance. this context, four configurations were tested evaluate influence entrance shape alveoli wid...