This study investigates the temporal and spatial evolution of a central sheet formed due to the interaction of lamellas of simultaneous impacts of two droplets on a dry substrate. A droplet generator released two equal-sized droplets simultaneously on demand. The impact Weber number and the inter-droplet spacing were varied between 54 to 128 and 1.64D0 to 2.25D0
(D0: droplet diameter) respectively to study both deposition and splashing of the central uprising sheets. The sheet temporal evolution reveals its uprising ‘semilunar’ shape, cusps and finger formation, and eventual deposition or splashing behavior. The maximum height of the ‘semilunar’ uprising sheet scales with the inertial force at the lamella-lamella impact location. For
cases leading to splashing, rim fingers eject secondary droplets via an end-pinching mechanism and the sizes of the ejected droplets are larger than those commonly observed for equivalent single droplet impacts.