Abstract:A water droplet can bounce off superhydrophobic surfaces multiple times before coming to a stop. The energy loss for such droplet rebounds can be quantified by the ratio of the rebound speed UR and the initial impact speed UI , i.e., its restitution coefficient e = UR/UI . Despite much work in this area, there is still incomplete mechanistic explanation for the energy loss for rebounding droplets. Here, we measured e for sub-millimetric and millimetric sized droplets impacting two different superhydrophobic su… Show more
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