A STUDY ON NUMERICAL SIMULATION OF OPENING HEIGHT OF DENSE FLOW INLET ON DENSE FLOW CHARACTERISTIC PARAMETERS

Abstract

Thick currents are produced where density differences exist between the fluid and the fluid layers. This density difference may be appeared by various mechanisms, such as temperature, salinity and flow of sediment-laden river in case of flooding into the aquatic environment. Such flows make up one of mechanism of sediment transport mechanisms in reservoirs, lakes, seas and oceans. In this study, the effect of valve size (the size of current input density) are examined on the dense flow characteristics. For this purpose, laboratory studies of Hosseini (2006) was used for calibration of fluent numerical model. In this research, a section located at a distance of 5 meters from the sluice gate was used in order to calculate and consider the effect of the valve on dense flow characteristics. The results showed that in a fixed gate opening height increased initial velocity, flow rate and thickness of the dense flow is reduced. Meanwhile, in an amount fixed initial velocity, by increasing the amount of valve opening, discharges and thick dense flow increases.