The ejecta sheet generated by the impact of a drop

By Sigurdur T. Thoroddsen. Journal of Fluid Mechanics, 2002

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Generation and breakup of Worthington jets after cavity collapse. Part 1. Jet formation (2009, background): “In this context, note that the impact of either a drop (Weiss & Yarin 1999; Thoroddsen 2002; Howison et al. 2005) or a solid object (Thoroddsen et al. 2004) onto a free surface also provokes the ejection of a sheet of liquid moving with a velocity of tens of times the impact velocity.”
Air entrapment under an impacting drop (2003, background): “This leads to the ‘coalescence cascade’, studied by Thoroddsen & Takehara (2000), which results in repeated contact events and associated air entrapment.”
Water entry of spinning spheres (2009, unknown): “These results are verified by Thoroddsen (2002) for liquid drops and are similar for solid spheres impacting on the surface (Thoroddsen et al. 2004).”
Review of mass and momentum interactions during drop impact on a liquid film (2016, methodology): “According to Thoroddsen [49,104] and Josserand and Zaleski [49,104], the speed, ve, of the intact ejecta decreases with increasing viscosity according to ve m 1=2f , and is much higher (over 10 times) than the impact velocity [49,104].”