基于兰姆波在玻璃基板驱动微升油水分离实验

Experiment on Separation of Microliter Oil/Water Mixed Droplets on Glass Substrate Driven by Lamb Wave

提出了在倾斜玻璃基板上平行安装两片谐振频率为1 MHz的单相叉指换能器(SPT)进行微升级液体油水分离实验探究。结合油水混合液滴在倾斜基板上的受力情况,利用二维Navier-Stokes方程和声流理论建立液滴运动力学模型,分析了微升油水分离时间随各影响因素下的变化关系。理论分析和实验结果表明,影响油水分离时间的因素主要有基板倾角、输入峰值电压和油水混合比例,通过调整影响因素,可以高效地把油水混合液滴进行分离。该研究方法可降低传统油水分离的生产成本,为分离两种不相溶的微升混合液滴提供了新思路。

In this paper,it is proposed to install two single phase transducers(SPTs)with resonance frequency of 1 MHz in parallel on the inclined glass substrate to conduct microliter oil/water mixed drop separation experiments.Combined with the force of oil/water mixed droplets on the inclined substrate,the two-dimensional Navier-Stokes equation and the sound flow theory were used to establish the droplet motion mechanics model.The variation relationship between the separation time of the microliter oil/water mixed drop and various influencing factors was analyzed.The theoretical analysis and experimental results show that the factors affecting the separation time mainly include the substrate inclination angle,input peak voltage and oil/water mixing ratio.The oil/water mixed droplets can be efficiently separated by adjusting the value of the influence factors.The research method can reduce the cost of traditional oil/water mixed drop separation,and provide a new idea for separating two incompatible microliter mixed droplets.