Simulations of complex drop impacts on Interfaces

A numerical investigation of complex drop impact configurations is carried out using a hybrid front-tracking/level-set CFD solver. As part of this work, several key set-ups are investigated: oblique drop impacting a ‘deep’ pool, instantaneous and successive multiple drops impacting a ‘deep’ pool, and vertical drop impact on a thin film in the presence of surfactants. We highlight through these simulations the temporal evolution of asymmetrical crowns, craters, and jets obtained as a result of these complex drop impact situations. We provide both qualitative and quantitative comparisons with a number of experimental studies (e.g. Bisighini 2010, Gielen et al. 2017, Che and Matar 2017, Spiers et al. 2018).