Near field mixing of Multi-Diffuser Dense Jets in Shallow water condition and Ambient Currents

Desalination plants are effective alternatives for providing required potable waters. Since outfall of these plants can be harmful for marine environments, it is desirable to use an optimum diffuser geometry with maximum dilution effect. A multiple diffuser system with a proper geometry is usually a good solution. In this study, the pollutant behavior of such a system in shallow water condition is investigated by making use of Computational Fluid Dynamic (CFD) method. An actual case is taken into account and both matching and opposite ambient currents are also simulated. It is concluded that the tail of the jet as well as its height and traveling length can be affected by ambient current, yet multi-diffuser jets are less sensitive to current than a single port system. It is also shown that simulating the pressure loss is an important item in designing an outfall system.