Drop Size Distribution in Atomization of a Radially Expanding Liquid Sheet

We have studied the atomization of a radially expanding thin liquid sheet formed by impingement of a liquid jet on a circular impactor. The sheet breaks from the rim into droplets. These experiments are performed in ambient conditions. Disturbances were introduced at the impingement point to investigate the effect of external forcing frequency and amplitude on the sheet break-up length and resulting drop size distribution. We observed that the sheet becomes more unstable resulting in a decrease in sheet break-up length and average drop size on increasing either the forcing frequency or the amplitude. This also resulted in a narrower drop size distribution.