Examining Viscosity and Surface Wettability on Lamella Lift Dynamics and Droplet Splashing

Subpatterns of Thin-Sheet Splash on a Smooth Surface

“…It is noted that the bulges can either be distributed in the rim without ligament or be ejected before the rim and the thin sheet break, as presented in Figure . The simultaneous breakup of the thin sheet and rim is consistent with that in the literature case of 50% glycerol at 3 atm by Vu et al…”

“…It is noted that the bulges can either be distributed in the rim without ligament or be ejected before the rim and the thin sheet break, as presented in Figure 3. The simultaneous breakup of the thin sheet and rim is consistent with that in the literature case of 50% glycerol at 3 atm by Vu et al 7 The splash in pattern 3 is characterized by the rim breakup as a whole subsequent to the breakup of the thin sheet. The representative case of a 50% glycerol solution droplet at We = 729 and Oh = 0.166 is shown in Figure 4.…”

“…5 For thin-sheet splash, the development of a thin sheet is crucial and therefore has been investigated experimentally and theoretically. 6,7 The specific definition of important components of thin-sheet splash is shown in Figure 1. The thin sheet is usually lifted from the surface, 8 the rim is the outer edge of the thin sheet with a number of bulges growing outwardly from the rim, and the contact line is the inner edge of the thin sheet.…”

On the role of liquid viscosity in affecting droplet spreading on a smooth solid surface

“…Lower ambient gas pressure delays the appearance of the thin sheet and suppresses fingering (Xu et al, 2005). The development of fingers during the spreading and the model prediction of the number of fingers were studied in the context of Rayleigh-Taylor instability (Allen, 1975;Bhola and Chandra, 1999;Thoroddsen and Sakakibara, 1998;Vu et al, 2011;Yarin, 2006). These studies investigated the occurrence of thin sheet and the mechanism of such instability at the rim of the droplet during spreading.…”

Effects of Liquid and Surface Characteristics on Oscillation Behavior of Droplets Upon Impact

“…Droplet impacts on hydrophilic and hydrophobic surfaces lead to interesting phenomena. Hydrophobic surfaces tend to increase the likelihood of splashing; as the spreading edge of the droplet is repulsed from the surface, instability based on density and acceleration differences between the liquid and ambient gas are magnified (Vu et al, 2011). On a surface with both hydrophobic and hydrophilic regions, if a portion of a droplet spreads over a hydrophilic region, the droplet can migrate entirely to that region to minimize surface energy (Mock et al, 2005).…”