Surfing and crawling macroscopic active particles under strong confinement: Inertial dynamics
Surfing and crawling macroscopic active particles under strong confinement: Inertial dynamics
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DOI：
10.1103/physrevresearch.2.043299
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发表时间：
2020-12-01
影响因子：
4.2
通讯作者：
Ahmed, Wylie W.
中科院分区：
文献类型：
--
作者：
Leoni, Marco;Paoluzzi, Matteo;Ahmed, Wylie W.
我们采用实验、理论和数值相结合的方法，研究了约束条件下两种活跃的(自推进的)宏观粒子：樟脑冲浪者和六角虫爬行者。与被广泛研究的微观活性颗粒和游泳运动员不同，热力往往很重要，而惯性可以忽略不计，而我们的宏观颗粒表现出复杂的动力学，这明显是由于主动非热噪声和惯性效应的结合。强禁闭在边界内的有限距离内诱导积累，并产生三种明显的动力学状态；这两种状态都取决于活动性和惯性。这些令人惊讶的复杂动力学已经在单粒子水平上出现--突显了惯性在宏观活性物质中的重要性。
We study two types of active (self-propelled) macroscopic particles under confinement: camphor surfers and hexbug crawlers, using a combined experimental, theoretical, and numerical approach. Unlike widely studied microscopic active particles and swimmers, where thermal forces are often important and inertia is negligible, our macroscopic particles exhibit complex dynamics due expressly to active nonthermal noise combined with inertial effects. Strong confinement induces accumulation at a finite distance within the boundary and gives rise to three distinguishable dynamical states; both depending on activity and inertia. These surprisingly complex dynamics arise already at the single-particle level-highlighting the importance of inertia in macroscopic active matter.