Towards Novel Micromanipulations of Submillimeter-Scale Particles in a Laterally-Oscillated Rectangular Container

Our previous study discovered that small particles scattered at the bottom of a water-filled rectangular container align at specific positions when the particles are subject to standing wave induced by laterally oscillating the container at specific frequencies. Also, we identified a method to theoretically estimate the oscillation frequency for aligning the small particles and the positions where several particle lines appear. As the next step, we are currently developing novel micromanipulation methods with this unique phenomenon targeting submillimeter-scale particles. In the present study, this alignment phenomenon is further studied to reveal the potential, especially focusing on the distribution of lateral fluid velocity in vertical direction, the amplitude of lateral oscillation, and the liquid height which have never been discussed in our previous study. This paper examines their relationships with the alignment condition and discusses the applicability of these findings obtained in the present study to develop novel micromanipulation methods of small particles.