بررسي نحوه تغييرات سرعت پيشاني جريان غليظ با تغييرات دبي و شيب در يك مقطع واگرا

A study of head velocity variations for density currents with discharge and slope variations in a divergent cross sections

Studying the head velocity of density currents in reservoirs and seas is very important. One critical parameter largely affecting the head velocity of density currents is the variations of a river section in damsʹ reservoirs. In the present study, using a physical model and a 3 dimensional mathematical model the head velocity of a density current into a divergent reservoir is investigated by various discharges and slopes. The experiments were performed in a flume with width of 72.5 m, length of 6 m and height of 60 cm. Different slopes and discharges are used. Then the Mathematical model was calibrated for a determinate discharge rate and the results were verified for a wide range of discharge rates. The mathematical model was performed for a wide range of densi ty current discharges and the results of both models were analyzed. At the end, head velocity variations for density currents due to the slope and discharge variations were presented in form of dimensionless parameters for fixed and divergent cross- sections