Impacts on viscous fluids: on ejecta, corolla and splashes

Abstract

We investigate both experimentally and numerically the impact of liquid drops on deep pools of aqueous glycerol solutions with variable pool viscosity and air pressure. With this approach we are able to address drop impacts on substrates that continuously transition from low-viscosity liquids to almost solids. We show that the generic corolla spreading out from the impact point consists of two distinct sheets, namely an ejecta sheet fed by the drop liquid and a second sheet fed by the substrate liquid, which evolve on separated timescales. These two sheets contribute to a varying extent to the corolla overall dynamics and splashing, depending in particular on the viscosity ratio between the two liquids.

arXiv comment5 pages, 3 figures

References in corpus (7)

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• Von Kármán Vortex Street within an Impacting Drop
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Cited by in corpus (13)

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• On the mechanics of droplet surface crater during impact on immiscible viscous liquid pool
• Entropic multi-relaxation-time lattice Boltzmann model for large density ratio two-phase flows
• Coalescence delay mediated by the gas layer during the impact of hot droplets
• Birth of a bubble: Drop impact onto a thin liquid film for an immiscible three-fluid system
• A new flow-based design for double-lumen needles
• Freezing delay of a drop impacting on a monolayer of cold grains
• Drop impact on wetted walls: An analytical solution for modelling the crown spreading based on stagnation-point flow
• Droplet splashing during the impact on liquid pools of shear-thinning fluids with yield stress