Secondary Breakup of Drops

Abstract

Secondary atomization of droplets generated from primary
atomization is observed in high-speed flows. In natural scenarios, falling
raindrops undergo aerodynamic breakup that modifies the resulting
drop size distribution on the ground. In this article, we review some
aspects of the drop breakup mechanisms, initial deformation, drag
characteristics, and time scales of breakup. We also review some of the
secondary atomization models, such as TAB and DDB, proposed in the
literature. We discuss the role of new numerical algorithms for two-phase
flow simulations in providing insights into the exact physical mechanisms
involved during drop breakup.