In a biomimetic approach the feasibility of liquid flow actuation by vibrating protruding structures excited via guided acoustic waves is investigated. Inspired by periodically beating cilia the loop part of a punched metallic hook-and-loop tape with tilted protruding loops was used as a waveguide for plate waves in water. Such waves were excited in the frequency range of 110 Hz to 220 Hz by directly coupling the tape to a loudspeaker membrane. A flow generated in the tilt direction of the loops with velocities up to 60 mm·s⁻¹ was visualized by ink droplets deposited on the tape. The phenomenon persisted, when the protruding length of the loops was reduced by decreasing the protrusion angle. However, after closing the punch holes near the loops with sticking tape streaming could not be observed any longer. The same happened with open punch holes when the ink was replaced by glycerol. Low-frequency acoustic streaming around vibrating sharp edges is proposed as an explanation for the observed phenomena. Applications are expected with respect to the modification of flow profiles and the enhancement of transport processes along and across liquid-solid boundaries.

在仿生方法中，研究了通过引导声波激发的振动突出结构来驱动液体流动的可行性。受到周期性跳动纤毛的启发，带有倾斜突出环的冲压金属钩环带的环部分被用作水中板波的波导。通过将磁带直接耦合到扬声器膜，可以在 110 Hz 到 220 Hz 的频率范围内激发这种波。在环的倾斜方向上产生的流动速度高达 60 mm·s ^-1通过沉积在胶带上的墨滴可视化。当环的突出长度通过减小突出角度而减小时，这种现象仍然存在。然而，在用胶带流关闭环附近的打孔后，无法再观察到。当墨水被甘油代替时，打开的打孔也会发生同样的情况。围绕振动尖锐边缘的低频声流被提议作为对观察到的现象的解释。预计在流动剖面的修改和沿液固边界和跨液固边界的传输过程的增强方面的应用。