Pneumatically-actuated artificial cilia array for biomimetic fluid propulsion
Pneumatically-actuated artificial cilia array for biomimetic fluid propulsion
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DOI：
10.1039/c5lc00775e
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发表时间：
2015-01-01
期刊：
影响因子：
6.1
通讯作者：
Reynaerts, Dominiek
中科院分区：
文献类型：
--
作者：
Gorissen, Benjamin;de Volder, Michael;Reynaerts, Dominiek
在自然界中，搏动纤毛阵列是一种小规模的最有效的推进机制，在微生物中无处不在。先前试图模仿这些系统的尝试，由于制造具有复杂跳动运动的小型纤毛的复杂性而失败。在本文中，我们首次提出了气动驱动的人工纤毛阵列，能够解决其中的一些问题。这些人造纤毛阵列由六个高度柔性的硅橡胶驱动器组成，直径为1毫米，长度为8毫米，可以相互独立驱动。在实验装置中，研究了驱动频率、相位差和占空比对闭环通道净流量的影响。测量到的净流体速度可达19毫米秒（-1）。此外，可以通过简单地改变驱动频率或通过改变驱动块脉冲压力波的占空比而不改变纤毛的弯曲方向来反转流动方向。利用PIV测量，我们首次证实了纤毛阵列的现有数学模型与原型的测量结果。
Arrays of beating cilia emerged in nature as one of the most efficient propulsion mechanisms at a small scale, and are omnipresent in microorganisms. Previous attempts at mimicking these systems have foundered against the complexity of fabricating small-scale cilia exhibiting complex beating motions. In this paper, we propose for the first time arrays of pneumatically-actuated artificial cilia that are able to address some of these issues. These artificial cilia arrays consist of six highly flexible silicone rubber actuators with a diameter of 1 mm and a length of 8 mm that can be actuated independently from each other. In an experimental setup, the effects of the driving frequency, phase difference and duty cycle on the net flow in a closed-loop channel have been studied. Net fluid speeds of up to 19 mm s(-1) have been measured. Further, it is possible to invert the flow direction by simply changing the driving frequency or by changing the duty cycle of the driving block pulse pressure wave without changing the bending direction of the cilia. Using PIV measurements, we corroborate for the first time existing mathematical models of cilia arrays to measurements on prototypes.