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.
See other videos from the 2020 Gallery of Fluid Motion: https://gfm.aps.org/