Dense jet modelling applied to the design of dense effluent diffusers

Abstract

A model aimed at predicting the behavior of inclined dense jets in a stagnant environment was proposed. The model takes into account four jet parameters (flow rate, density, inclination and diameter) and results in a set of algebraic and ordinary differential equations, which are easily solved by simple (standard) numerical methods. Model results include information on the trajectory, spreading and dilution of the inclined dense jets. Model predictions were compared with experimental data obtained with different nozzle diameters,jet flow rates,jet densities and nozzle inclinations. Despite the wide range encompassed by the experimental data analyzed, model predictions were always found to agree very well with all other available data. The model may be therefore considered as well validated. Lastly, a sample application to the design of a dense effluent diffuser is presented.