Akademik Veri Yönetim Sistemi
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING, cilt.48, sa.2, 2026 (SCI-Expanded, Scopus)
Marine discharge structures play a critical role in managing the release of brine disposal, where dilution is essential to minimize environmental impacts. The hydraulic design of the diffuser is a key task in the design of the entire outfall, and a proper design is only possible through the analysis of jet geometry and behavior to ensure sufficient dilution. In this study, round and duckbill nozzle types were modeled to analyze the impact of nozzle geometry on initial dilution. For this purpose, three-dimensional models were created using the computational fluid dynamics (CFD) software Ansys Fluent. Models were analyzed under the same conditions, such as discharge, port area, and receiving ambient density, by changing only the nozzle geometry. Afterward, the effect of the most effective nozzle type, determined as duckbill-type, on the inclined dense jet discharge was also investigated in terms of the optimum jet angle for effective dilution. Then, the same system was solved at two different flow rates and nozzle angles. Models with duckbill nozzles have relatively higher initial dilutions at the centerline peak and the turning points than those with round nozzle geometry. In addition, the duckbill-type nozzle models also showed longer trajectories at various flow rates. The analysis also revealed that the effective angle for using the duckbill check valve is 45 degrees. The findings provide valuable information for the optimization of marine discharges.