水平加振中の矩形容器底面における流体解析

抄録

Our previous studies found that small particles scattered at the bottom of a water-filled rectangular container form several lines at specific positions when laterally oscillating the container at specific frequencies. A fluid analysis focusing on the fluid behavior at the bottom of container elucidated that the small particles tend to gather at the position where the lateral fluid velocity and its change are both zero. Additionally, we succeeded in batch manipulation of the small particles with 100 Pm in diameter at the bottom of container by using proper lateral oscillations. The present study challenges to develop a novel method to separate small particles with various sizes by using this unique phenomenon. To achieve this objective, in the present paper, we further analyze the fluid behavior by expanding the analysis area to neighborhood of the bottom of the container. We assumed that larger small particles align at a bit different positions from the estimated ones because the lateral fluid velocity slightly increases with the distance from the bottom of container and it should affect the behavior of small particles. Based on the fluid analysis, this paper discusses if the slight increase in fluid velocity can cause the different behavior in small particles with different size and if it can be used for particle separations.