Liquid-grain mixing suppresses droplet spreading and splashing during impact
arXiv:1607.00285 · doi:10.1103/PhysRevLett.118.054502
Abstract
Would a raindrop impacting on a coarse beach behave differently from that impacting on a desert of fine sand? We study this question by a series of model experiments, where the packing density of the granular target, the wettability of individual grains, the grain size, the impacting liquid, and the impact speed are varied. We find that by increasing the grain size and/or the wettability of individual grains the maximum droplet spreading undergoes a transition from a capillary regime towards a viscous regime, and splashing is suppressed. The liquid-grain mixing is discovered to be the underlying mechanism. An effective viscosity is defined accordingly to quantitatively explain the observations.
References in corpus (13)
- Drop Splashing on a Dry Smooth Surface
- On the spreading of impacting drops
- Water spring: a model for bouncing drops
- Maximal air bubble entrainment at liquid drop impact
- Ultrafast Interference Imaging of Air in Splashing Dynamics
- It's harder to splash on soft solids
- Granular impact and the critical packing state
- Force and flow transition in plowed granular media
- Granular impact cratering by liquid drops: Understanding raindrop imprints through an analogy to asteroid strikes
- Morphology Scaling of Drop Impact onto a Granular Layer
- Phase transition in a static granular system
- Raindrop impact on sand: a dynamic explanation of crater morphologies
- Shearing of frictional sphere packings
Cited by in corpus (7)
- Crater formation during raindrop impact on sand
- Impact cratering in sand: Comparing solid and liquid intruders
- Cold granular targets slow the bulk freezing of an impacting droplet
- Drop impact on wet granular beds: water-content effects on the cratering
- Hydrogel sphere impact cratering, spreading and bouncing on granular media
- Possible, Impossible, and Expected Diameters and Production Rates of Droplets in Aerosols and Sprays
- Corona splashing triggered by a loose monolayer of particles