Flagellar dynamics of a connected chain of active, polar, Brownian particles
Flagellar dynamics of a connected chain of active, polar, Brownian particles
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DOI：
10.1098/rsif.2013.0884
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发表时间：
2014-03-06
影响因子：
3.9
通讯作者：
Hagan, Michael F.
中科院分区：
文献类型：
--
作者：
Chelakkot, Raghunath;Gopinath, Arvind;Hagan, Michael F.
我们发现，活跃的，自我推进的颗粒连接在一起，形成一个单一的链，是锚定在一端可以产生优雅的殴打运动的鞭毛。将边界条件从夹钳改变为锚处的枢轴导致稳定旋转的紧密线圈。系统中的强噪声破坏了振荡的规律性。我们使用详细的数值模拟，平均场标度分析和首次通过时间理论相结合的特点作为灯丝长度，被动弹性，推进力和噪声的函数的相图。我们的研究表明，在一个活跃的极性链振荡的发病最小的实验测试。
We show that active, self-propelled particles that are connected together to form a single chain that is anchored at one end can produce the graceful beating motions of flagella. Changing the boundary condition from a clamp to a pivot at the anchor leads to steadily rotating tight coils. Strong noise in the system disrupts the regularity of the oscillations. We use a combination of detailed numerical simulations, mean-field scaling analysis and first passage time theory to characterize the phase diagram as a function of the filament length, passive elasticity, propulsion force and noise. Our study suggests minimal experimental tests for the onset of oscillations in an active polar chain.