Takayama Toshio, Kaneko Makoto, Tsai Chia-Hung Dylan
Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan.
Graduate School of Science and Engineering, Meijo University, Nagoya 468-8502, Japan.
Micromachines (Basel). 2021 Feb 21;12(2):217. doi: 10.3390/mi12020217.
In this paper, we propose an on-chip micromixer driven by an elastic wall with a virtual actuator. The on-chip micro mixer is composed of a circular chamber surrounded by a ring-shaped channel under isolation with an elastic wall. When vibrational pressure is put on the driving channel by an actuator, the volume of the circular chamber changes through the deformation of the elastic wall, as if there exists a virtual actuator near the wall. As a result, the liquid in the circular chamber is pushed out and pulled through the neck channel. This action creates a swirling flow in the circular chamber while maintaining isolation from the driving channel. Through experiments, we confirmed the swirling flow under an isolated environment using an air-based valve. The advantage of this approach is that the micromixer can be designed with a single layer having a simple mechanism.
在本文中，我们提出了一种由带有虚拟致动器的弹性壁驱动的片上微混合器。该片上微混合器由一个圆形腔室组成，该圆形腔室被一个通过弹性壁与驱动通道隔离的环形通道包围。当致动器对驱动通道施加振动压力时，圆形腔室的体积会通过弹性壁的变形而改变，就好像在壁附近存在一个虚拟致动器一样。结果，圆形腔室内的液体被推出并通过颈部通道被拉动。这种作用在圆形腔室内产生了旋流，同时与驱动通道保持隔离。通过实验，我们使用基于空气的阀门在隔离环境下证实了旋流。这种方法的优点是微混合器可以设计为具有简单机制的单层结构。
