Khaderi S N, Baltussen M G H M, Anderson P D, den Toonder J M J, Onck P R
Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Aug;82(2 Pt 2):027302. doi: 10.1103/PhysRevE.82.027302. Epub 2010 Aug 25.
In this Brief Report we investigate biomimetic fluid propulsion due to an array of periodically beating artificial cilia. A generic model system is defined in which the effects of inertial fluid forces and the spatial, temporal, and orientational asymmetries of the ciliary motion can be individually controlled. We demonstrate that the so-far unexplored orientational asymmetry plays an important role in generating flow and that the flow increases sharply with Reynolds number and eventually becomes unidirectional. We introduce the concept of configurational symmetry that unifies the spatial, temporal, and orientational symmetries. The breaking of configurational symmetry leads to fluid propulsion in microfluidic channels.
在本简短报告中，我们研究了由一系列周期性摆动的人工纤毛引起的仿生流体推进。定义了一个通用模型系统，其中惯性流体力以及纤毛运动的空间、时间和方向不对称性的影响可以单独控制。我们证明，迄今为止尚未探索的方向不对称性在产生流动方面起着重要作用，并且流动随着雷诺数急剧增加，最终变为单向流动。我们引入了构型对称性的概念，它统一了空间、时间和方向对称性。构型对称性的破坏导致微流控通道中的流体推进。
