73th Annual Meeting of the APS Division of Fluid Dynamics (November 22, 2020 — November 24, 2020)

V0069: Drop Bouncing: Energetics, bubble entrapment and bubble escape

  • Praveen Sharma, Indian Institute of Technology Hyderabad
  • Harish Dixit, Indian Institute of Technology Hyderabad
DOI: https://doi.org/10.1103/APS.DFD.2020.GFM.V0069

The movie presents a three-dimensional evolution of the drop for Weber number 3.21 and Reynolds number 1035. It is a result of an axisymmetric direct numerical simulation of a complete cycle of drop bouncing. The drop begins from initial height and then impact on a superhydrophobic solid surface. During impact, it entraps a gas bubble from the top due to capillary waves, after lift-off from the surface bubble escapes from the drop. Simulation is carried out in Gerris. Video also includes the evolution of the kinetic, surface and potential energies during the bouncing.

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