Hydraulic Evaluation of Lateral Pipe-intake from Open Channel by Numerical Simulation

Lateral Intake which uses a pipe is a hydraulic structure that has been utilized in water intake from rivers and channels, especially in those situations in which the area topography doesn’t allow to build a lateral channel for water intake. This study deals with the numerical investigation of effective geometrical parameters on lateral intake efficiency with a pipe in a rectangular open channel by using Flow3D software. The parameters that studied, are including the direction of the pipe intake respect to the main channel, the position of the pipe intake entrance in the width of the main channel, the position of the pipe intake entrance in the water depth, the diameter of the pipe intake and the shape of the pipe intake entrance. The comparison of the diverted discharge results for different levels of the pipe intake indicated that if the water intake is placed at relative height level of 0.28 to 0.57 of the water depth, the diverted discharge would be more than others.  Furthermore, by comparing anti-sediment coefficient for different levels demonstrate that if the pipe intake locates near the surface of the flow, anti-sediment coefficient will have an acceptable value.