Performance of the Single Round Nozzle of the Marine Outfall System for Buoyant Fluid at Stable Water in the Unstratified Water Depth

The marine outfall system is used for disposal of effluent into the ocean. There is a strong belief that the ocean is an ultimate sink for the disposal of wastewater making sure that the disposed of effluent is within the standard disposal limits. For the large-quantity effluent discharge, multiport diffuser type marine outfall system is effective. The multiport diffuser is a series of main outfall pipe connected to the diffuser system with multiple nozzle ports connected in parallel to each other with an optimum spacing. In this study, the performance of the single round nozzle for buoyant fluids at a stable water condition in the unstratified water depth is carried out. The same is carried out for the multiple port round nozzle by varying the spacing distance between the consecutive ports. The numerical simulation for the single round nozzle for varying port outlet velocities is carried out achieving acceptable densimetric Froude number enhancing the performance of the round nozzle’s diffusion rate for the positively buoyant, neutrally buoyant and negatively buoyant effluent, and its respective plume characteristics are studied.