Multitude of dimple shapes can produce singular jets during the collapse of immiscible drop-impact craters

Abstract

Abstract

Water entry of spheres into a rotating liquid

“…The prefactor of the fit remains nearly constant () across the cases. When we focus on the final stage of the collapse (), the direct fitting between and gives a power-law exponent of approximately 0.54 for all cases, which is close to the value recently found in experiments (0.55; Yang, Tian & Thoroddsen 2020). This is also consistent with previous experiments (Bergmann et al.…”

“…Tian & Thoroddsen 2020). This is also consistent with previous experiments (Bergmann et al 2006) and the corresponding slow asymptotic theory (Eggers et al 2007).…”

On the jets produced by drops impacting a deep liquid pool and by bursting bubbles

“…(2018) and Yang et al. (2020) report experiments on DP jets with velocities up to m , which can be depicted in figure 25, where the experimental measurements are compared with the jet velocities calculated as , with given by (4.20) and measured from the experimental images included in the figure. It can be seen in figure 25 that the predicted velocity of the jets are, in some cases, in very close agreement with the measured values.…”

“…2017; Thoroddsen et al. 2018; Yang, Tian & Thoroddsen 2020) share a common feature since they both emerge as a consequence of the axial convergence of the capillary waves that propagate along the collapsing cavity walls. Moreover, the largest jet velocities measured in each of these physical situations are quite similar: m s in the case of the collapse of Faraday waves (Zeff et al.…”

“…2018; Yang et al. 2020), whereas in the case of bubble bursting jets, Blanco-Rodríguez & Gordillo (2020) have reported maximum velocities of , with and respectively indicating the interfacial tension coefficient and the liquid viscosity, which, in the case of water properties, imply maximum jet speeds of m s.…”