بررسي خصوصيات هيدروليكي جريان هاي غليظ ورودي به مخازن

Investigation on Hydraulic Characteristics of Density Currents in Reservoires

Investigation of the behavior of density current released down a sloping surface in a tank of freshwater is reported herein. The inl1uence of slope on the behavior of density currents, head velocity and body entrainment arc experimentally investigated. The experiments were carried out in a tilting flume with different sediments to reasonably obtain a wide range of results, Based on the dimension analysis, dimensionless parameters were determined. Observations and measurements revealed a variety of phenomena depending strongly on the Richardson Number and the angle of incline. Also the non-dimensional head velocity and non-dimensional sediment tall velocity were being considered. A power type equation was found between head velocity and Buoyancy flux. Based on the present study and previous investigations of other researchers, regression equations of water entrainment were determined as functions of Richardson number and bed slope.