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Numerical Study on the Effect of Anisotropic Turbulence Characteristics on the Droplet Behaviors for Impinging Sprays  

Ko G. H (중앙대학교 대학원 기계공학부)
Ryou H. S (중앙대학교 기계공학부)
Publication Information
Journal of computational fluids engineering / v.8, no.4, 2003 , pp. 6-15 More about this Journal
Abstract
It is an aim of this study to perform extensive numerical study for analyzing the anisotropic turbulence effects on spatial and temporal behaviors of droplet for impinging sprays. The turbulence model of Durbin is used for comparisons with the k-ε model. The turbulence-induced dispersions of droplets are considered to describe the anisotropy of turbulence effectively and spray/wall interactions are simulated using the model of Lee and Ryou. Present study investigates the overall and the internal structures of impinging diesel sprays such as spray shapes, radius and height of wall sprays, Sauter mean diameter (SMD), local droplet velocity, and local gas velocity and compared the results with experimental data by two adopted turbulence models. When the anisotropy effect of turbulence is included, better predictions for both gas and droplet tangential velocities are obtained, compared to the k-ε model. It is concluded that anisotropic effect of turbulence should be considered for simulating impinging diesel sprays.
Keywords
Impinging Spray; Anisotropic Turbulence; Splash; Wall-Jet Vortex;
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