67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0047: Breaking Droplets: Superhydrophobic Surface Breakup

Authors
  • Jonathan Stoddard, Brigham Young University
  • Allison Lee, Brigham Young University
  • Tadd Truscott, Brigham Young University
  • Julie Crockett, Brigham Young University
  • Daniel Maynes, Brigham Young University
DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0047

We examine the effect of droplet impingement on a superhydrophobic surface with a needle macro feature. Four cases, each comparing with and without the presence of the needle, are presented having a range of Weber numbers from 25 to 108 and one droplet diameter of 4.4 mm. The results show that the needle causes the droplet to form a ring shape after impingement, breakup of the droplet at lower Weber number, and a reduced contact time of the droplet with the surface.

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