MODELING OF TURBULENT SPRAY FLOWS USING AN IMPROVED MODEL FOR DROPLET MOTION

Turbulent spray flows usually involve large degrees of freedom and feature complex interactions between the turbulent gas flow and the spray. Therefore, a better understanding of turbulent two-phase flows is highly desirable. The objective of this paper is to improve the prediction of turbulent spray processes using a modified equation for droplet motion. In the current study, a stochastic term was added to the equation of droplet motion to account for the stochastic force. A comparison with experiments from the literature and with the results computed by the standard model shows better agreement for both the droplet velocity and Sauter mean radius. The fluctuations appearing in the profiles of droplet velocities and Sauter mean radius are considerably reduced, especially at axial locations near the injector. At axial locations far from the injector, the prediction of the Sauter mean radius near the centerline is improved.