The collision dynamics of two drops of the same liquid moving in the same direction has
been studied numerically. A wide range of radius ratios of trailing drop and leading drop (R
r) and the velocity ratios (U r) have been deployed to understand the collision outcomes. A
volume of fluid based open-source fluid flow solver, Basilisk, has been used with its adaptive
mesh refinement feature to capture the nuances of the interface morphology. The
simulations are analyzed for the evolving time instances. Different collision outcomes, such …