Effects of Discharges Source Section on Flow Characteristics of Negatively Buoyant Effluent

Results of a comprehensive experimental study on the impact of the outfall source shape on flow characteristics in surface discharge of negatively buoyant effluent in stagnant water were done on two sections of rectangular and trapezoidal (The optimal hydraulic cross section). These experiments were recorded in dark room and processed using digital analysis. Dense flow behavior was reported for Densimetric Froude number less than twenty so, the self-similarity property of flow is not established in these experiments. The parameters examined in this research include flow pattern, concentration profiles, change width and flow trajectory. The result of flow behavior in these sections indicates that despite similar behavioral pattern, geometric and mixing characteristics of trapezoid are better than rectangular.