Periodic and quasiperiodic motion of an elongated microswimmer in Poiseuille flow

Periodic and quasiperiodic motion of an elongated microswimmer in Poiseuille flow
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泊肃叶流中细长微型游泳器的周期和准周期运动

DOI:
10.1140/epje/i2013-13004-5
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发表时间:
2013
期刊:
The European Physical Journal E
影响因子:
--
通讯作者:
H. Stark
H. Stark
中科院分区:
--
文献类型:
--
作者:
A. Zöttl;H. Stark

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摘要本文研究了不同流型下长椭圆形微泳者在Poiseuille流中的动力学行为。当在两个平行板之间或在圆柱形微通道中移动时,游泳者进行周期性摆动或周期性翻滚运动。尽管球形和细长游泳运动员的轨迹在性质上是相似的,但摆动和翻滚的频率很大程度上取决于游泳运动员的纵横比。在对称性降低的水道中,游泳者执行准周期运动,我们明确演示了在椭圆形横截面的水道中游泳时的准周期运动。
AbstractWe study the dynamics of a prolate spheroidal microswimmer in Poiseuille flow for different flow geometries. When moving between two parallel plates or in a cylindrical microchannel, the swimmer performs either periodic swinging or periodic tumbling motion. Although the trajectories of spherical and elongated swimmers are qualitatively similar, the swinging and tumbling frequency strongly depends on the aspect ratio of the swimmer. In channels with reduced symmetry the swimmers perform quasiperiodic motion which we demonstrate explicitly for swimming in a channel with elliptical cross-section.Graphical abstract
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