Collective vibrations of confined levitating droplets
Collective vibrations of confined levitating droplets
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DOI：
10.1103/physrevfluids.5.083601
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发表时间：
2020-01
期刊：
影响因子：
--
通讯作者：
Stuart A. J. Thomson;M. Couchman;J. M. Bush
中科院分区：
文献类型：
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作者：
Stuart A. J. Thomson;M. Couchman;J. M. Bush
我们报道了一种新型的基于流体驱动的耗散振荡器系统，该系统由在垂直振动的液浴上弹跳的毫米级液滴晶格组成，并被束缚在一个环形环内。我们描述了系统的行为，因为它是通过逐步增加的浴的振动加速度的激励。根据液滴的数量，晶格运动的开始可能采取非相振荡或惊人的孤立波状不稳定性的形式。理论模型表明，这些行为可能归因于不稳定开始时的不同分岔。本文的研究结果证明了行走液滴系统作为研究宏观尺度上波介导、惯性、非平衡粒子动力学的平台的潜力和实用性。
We report a new type of fluid-based driven dissipative oscillator system consisting of a lattice of millimetric fluid droplets bouncing on a vertically vibrating liquid bath and bound within an annular ring. We characterize the system behavior as it is energized through a progressive increase in the bath's vibrational acceleration. Depending on the number of drops, the onset of motion of the lattice may take the form of either out-of-phase oscillations or a striking solitary wave-like instability. Theoretical modeling demonstrates that these behaviors may be attributed to different bifurcations at the onset of instability. The results presented here demonstrate the potential and utility of the walking droplet system as a platform for investigating wave-mediated, inertial, non-equilibrium particle dynamics at the macroscale.