Oblique drop impact onto a deep liquid pool

Marise V. Gielen, Pascal Sleutel, Jos Benschop, Michel Riepen, Victoria Voronina, Claas Willem Visser, Detlef Lohse, Jacco H. Snoeijer, Michel Versluis, Hanneke Gelderblom
2017 Physical Review Fluids  
Oblique impact of drops onto a solid or liquid surface is frequently observed in nature. Most studies on drop impact and splashing, however, focus on perpendicular impact. Here, we study oblique impact of 100-micrometer drops onto a deep liquid pool, where we quantify the splashing threshold, maximum cavity dimensions and cavity collapse by high-speed imaging above and below the water surface. Gravity can be neglected in these experiments. Three different impact regimes are identified: smooth
more » ... position onto the pool, splashing in the direction of impact only, and splashing in all directions. We provide scaling arguments that delineate these regimes by accounting for the drop impact angle and Weber number. The angle of the axis of the cavity created below the water surface follows the impact angle of the drop irrespectively of the Weber number, while the cavity depth and its displacement with respect to the impact position do depend on the Weber number. Weber number dependency of both the cavity depth and displacement is modeled using an energy argument.
doi:10.1103/physrevfluids.2.083602 fatcat:fysitrfq2jft5gz6vkjz4znnde