Study of Grid Dependency of Sheet Atomization Model of a Pressure-Swirl Atomizer

An improved spray model of a pressure-swirl atomizer was developed and the grid dependency of the model was investigated. Since the Lagrangian-Eulerian approach was adopted for tracking droplets, very small grids could not be used. However, in order to detect swirl flow accurately, small grids were needed because of the consideration of swirl injection. In order to overcome these limitations, numerical studies were performed by using various grids with cell sizes ranging from 10.0 10 mm to 0.625 0.625 mm. From these calculated results, it was observed that the most efficient grid cell size was 1.25 1.25 mm.