Rebound dynamics of a superhydrophobic sphere
ORAL
Abstract
Small solid particles impacting a water surface can become trapped, rebound, or pass through the interface [Lee & Kim, Langmuir, 24 (2008)]. In the present work, we focus on the bouncing dynamics of millimetric superhydrophobic spheres impacting the surface of a quiescent water bath. Through experiments, we characterize the dependence of the normal coefficient of restitution and contact time on the impact velocity, radius, and relative density of the sphere. We also highlight a qualitatively new regime identified that occurs near the sinking threshold for many spheres. Ongoing work and future directions will be discussed.
*We would like to acknowledge the finanical support of the Brown Seed Award and the Brown Undergraduate Teaching and Research Award (UTRA).
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Presenters
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Isabelle Bauman
- School of Engineering, Brown University