Granular rafts evolution on Faraday waves

Ji-Lin Jou^1*, Lin I¹

¹Department of Physics, National Central University, Taoyuan, Taiwan

* Presenter:Ji-Lin Jou, email:fig31415926@livemail.tw

Particles floating on the liquid interface can aggregate and form a granular raft, which affects the interface property and induces several interesting phenomena, like wrinkle pattern or encapsulation process. However, for particles on the wavy water surface, such as marine debris on a sea surface, the response of wave-particle mutual interaction is still elusive. In this work, we experimentally investigate the spatiotemporal evolution of granular rafts on the surfaces of Faraday waves, and their interaction with oscillons, parametrically generated by vertically oscillating a water tank. Increasing the raft size tends to suppress the wave and affects the topologies of the surrounding oscillon patterns, which in turn affects the raft dynamics, e.g. inducing splitting or recombination of rafts, causing anomalous diffusions of the translational and rotation motions of rafts.

Keywords: Granular raft, Faraday wave, Wave-particle interaction, Caged-hopping motion