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Drop impact close to the edge of an inclined substrate: Liquid sheet formation and breakup

S. Lejeune and T. Gilet*

  • Microfluidics Lab, Department of Aerospace and Mechanical Engineering, University of Liège, 4000 Liège, Belgium

  • *tristan.gilet@uliege.be
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Phys. Rev. Fluids 4, 053601 – Published 8 May, 2019

DOI: https://doi.org/10.1103/PhysRevFluids.4.053601

Abstract

Raindrop impacts on plant leaves are responsible for the dispersal of several crop diseases. In this experimental study, we propose a generic impact configuration that shares several qualitative features with more complex impacts on leaves. We investigate the formation and breakup of a liquid sheet upon impact of a drop close to the horizontal edge of an inclined substrate. The impact Weber number, the distance from the impact point to the edge, and the substrate inclination are systematically varied. We analyze their influence on the kinematics of both the liquid spreading on substrate and the liquid sheet beyond the edge, as well as on the subsequent statistics of droplet ejection (radius, speed, and time of ejection).

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Phys. Rev. Fluids 4, 053601– Published 8 May, 2019
  • Received 22 November 2018
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