Abstract
Abstract
Highlights
Free-surface impacts have been the subject of rigorous scientific study since the pioneering work of Worthington (1882, 1897)
Studies covering moderate Weber number regimes have focused on cavity formation and cavity pinch-off upon surface penetration of projectiles (Duclaux et al 2007; Aristoff & Bush 2009; Truscott, Epps & Belden 2014), jet formation at the initial stages of impact (Thoroddsen et al 2004) and forces in the early stages of impact (Moghisi & Squire 1981)
We show that direct numerical simulations of pseudo-solid spheres impacting a fluid bath are able to accurately capture all features observed in our experimental studies and act as a bridge between experiments and modelling efforts
Summary
Free-surface impacts have been the subject of rigorous scientific study since the pioneering work of Worthington (1882, 1897) Interest in this area of study was fuelled by military and engineering applications related to alighting of aeroplanes on water and water entry of projectiles. The study of regimes for which the impact is dominated by capillary effects has been motivated by biological and biomimicry applications (Bush & Hu 2006; Hu et al 2010; Koh et al 2015) In these cases, impacts that do not break through the surface are relevant to the study of water-walking mechanisms (Yang et al 2016). Dynamic particle motion with capillary effects is fundamental to a number of industrial processes including self-assembly of particles at interfaces (Whitesides & Boncheva 2002; Whitesides & Grzybowski 2002), wet scrubbing and deposition for removal of particulates from gases (Jaworek et al 2006; Wang, Song & Yao 2015), mineral flotation for material processing (Ueda et al 2010; Liu, Evans & He 2016) and particle deposition techniques for rapid manufacturing (Haley, Schoenung & Lavernia 2019)
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