Purcell's "rotator": mechanical rotation at low Reynolds number
Purcell's "rotator": mechanical rotation at low Reynolds number
复制标题
DOI：
10.1140/epjb/e2005-00302-5
复制
发表时间：
2005-09-01
影响因子：
1.6
通讯作者：
Stone, HA
中科院分区：
文献类型：
--
作者：
Dreyfus, R;Baudry, J;Stone, HA
由三个球体组成的物体，像轮子上的辐条一样连接在一起，当球体的相对位置通过四步循环进行时，可以进行净旋转运动。这种旋转运动类似于最初由珀塞尔（1977）提出的双铰链游泳者，它已经成为游泳机械实现的原型。我们还注意到，这里分析的旋转运动可能是有用的微机械的设计，并已确定最近的分子尺度的旋转电机的相似之处。
An object consisting of three spheres, linked like the spokes on a wheel, can undergo a net rotational movement when the relative positions of the spheres proceed through a four-step cycle. This rotational motion is the analogue of the two-hinged swimmer originally proposed by Purcell ( 1977), which has served as a prototype for mechanical implementations of swimming. We also note that the rotational motion analysed here may be useful in the design of micromachines and has similarities to molecular-scale rotational motors that have been identified recently.