Three-bead steering microswimmers
Three-bead steering microswimmers
复制标题
DOI：
10.1103/physreve.97.023102
复制
发表时间：
2018-02-05
影响因子：
2.4
通讯作者：
Misbah, Chaouqi
中科院分区：
文献类型：
--
作者：
Rizvi, Mohd Suhail;Farutin, Alexander;Misbah, Chaouqi
自推进微泳者作为生物细胞迁移的模型系统和人工微机械，近年来引起了人们的广泛关注。一个简单的和充分研究的微型游泳者模型由三个相同的球形珠加入两个弹簧在一个线性的方式与积极的振荡力被施加在珠上，以产生自推进。我们已经将这种线性微型游泳器配置扩展到三角形几何形状，其中三个珠子以等边三角形的方式由三个相同的弹簧连接。作用在每个弹簧上的作用力可以导致自主转向运动;即，允许游泳者沿沿着任意路径移动。我们探索的microswimmer动力学分析，并查明其丰富的字符取决于积极的力量的性质。微泳者可以沿着直线轨迹平移，在固定位置旋转，以及同时执行平移和旋转，从而产生复杂的弯曲轨迹。微型游泳器的三个弹簧上的正弦主作用力自然包含四个操作参数，这四个操作参数大于转向运动所需的参数。我们确定的最小操作参数，这是必不可少的运动的microswimmer沿着任何给定的任意轨迹。因此，随着沿着提供洞察自然和人工的microswimmer的复杂运动的力学，三角形的三珠microswimmer可以被用作靶向药物输送系统和自主水下航行器的模型，其中涉及复杂的轨迹。
The self-propelled microswimmers have recently attracted considerable attention as model systems for biological cell migration as well as artificial micromachines. A simple and well-studied microswimmer model consists of three identical spherical beads joined by two springs in a linear fashion with active oscillatory forces being applied on the beads to generate self-propulsion. We have extended this linear microswimmer configuration to a triangular geometry where the three beads are connected by three identical springs in an equilateral triangular manner. The active forces acting on each spring can lead to autonomous steering motion; i.e., allowing the swimmer to move along arbitrary paths. We explore the microswimmer dynamics analytically and pinpoint its rich character depending on the nature of the active forces. The microswimmers can translate along a straight trajectory, rotate at a fixed location, as well as perform a simultaneous translation and rotation resulting in complex curved trajectories. The sinusoidal active forces on the three springs of the microswimmer contain naturally four operating parameters which are more than required for the steering motion. We identify the minimal operating parameters which are essential for the motion of the microswimmer along any given arbitrary trajectory. Therefore, along with providing insights into the mechanics of the complex motion of the natural and artificial microswimmers, the triangular three-bead microswimmer can be utilized as a model for targeted drug delivery systems and autonomous underwater vehicles where intricate trajectories are involved.