Drop impact dynamics on solid surfaces

Drop impact on solid surfaces widely occurs both in nature and engineering. In this Perspective, we review the recent advances in experimental, theoretical, and numerical investigations of drop impact dynamics on solid surfaces. The relevant theoretical models and numerical methods, such as the wetting transition models and the volume-of-fluid method, are briefly described. The influences of key factors on the drop impact dynamics, and the underlying mechanisms of forces and energies, are examined. Especially, we analyze the contact time for a drop impacting on a solid surface and discuss the effective strategies to tune the dynamic impact behavior. The design principles of functional surfaces and some typical applications are also discussed. Finally, Perspectives are given on future development of the drop impact dynamics and its potential applications in diverse engineering fields.