The water droplet motion processes actuated by applying surface acoustic waves at various RF powers and frequencies were investigated by numerically modelling and compared with experiment. A three-dimensional computational model of a free water droplet streaming on the surface of the substrate have been developed using Finite Element Method (FEM) with Laminar Two-Phase Flow Moving Mesh approach for Navier–Stokes equations which were coupled with Convection Wave equation (CWE) module of the COMSOL Multiphysics. Water droplet motion speeds were experimentally measured and confirmed for water droplets with the volumes of 2 and 5 μl, at SAW frequencies 34 and 58 MHz, and power range 0.1–1.23 W. The effect of frequency on microfluidic performance such as streaming flows and droplet motion has been studied both numerically and experimentally toward developing MEMS devices for future energy sources, e.g., for direct methanol fuel cells, hydrogen energy, as well as for use in a wide variety of chemical, water desalination and purification of other fluids from salts, germs, bacteria, and viruses based on perspective multiphysical effects.

通过数值模拟并与实验比较，研究了通过施加不同射频功率和频率的表面声波驱动的水滴运动过程。使用有限元法 (FEM) 和层流两相流移动网格方法开发了基板表面上自由水滴流动的三维计算模型，用于纳维 - 斯托克斯方程，该方程与对流波方程耦合（ CWE) COMSOL Multiphysics 模块。对于体积为 2 μl 和 5 μl、SAW 频率为 34 和 58 MHz、功率范围为 0.1-1.23 W 的水滴，水滴运动速度通过实验测量和确认。