Evaluating the effect of upside and downside slope on flow hydraulic in cylindrical overflows by using Flow 3D software

Features and behavior of flow in hydraulic structures is one of the complex phenomena. Cylindrical overflow is a simple hydraulic structure which is used for energy dissipation, control and flow measurement. Hereof the sharp, wide and climactic edges overflows are used commonly. In water transmission and distribution systems, cylindrical overflows and crest- circular overflows because of being affordable and ease of fabrication compared with other overflows can be used for measurement of flow rate, evacuation buildings of flow water and controlling the level of water in canals and reservoirs. The water flow on overflow of dams and used overflows in water supply and sewage networks are some cases that a design engineer is in contact with them.