For deeper insights into the dynamics of dense sprays, the present experimental work
investigates the shock-induced breakup of two identically sized water droplets in tandem
formation. The breakup process is visualized in a shadowgraph system and captured by an
ultra-high-speed camera. The experimental Weber number ranges from 13 to 180, and the
separation distance between the droplets is varied between 1.2 and 10.5 times of the droplet
diameter. While the tandem formation exerts marginal influence on the lead droplet, the …