加熱液面の温度分布がライデンフロスト液滴の自己推進挙動に及ぼす影響

抄録

In recent years, the development of contactless droplet manipulation has been attracting attention in chemical and pharmaceutical fields. Most of the existing studies have focused on interactions on unheated liquid pool and on heated/ unheated solid substrate because it is difficult to fully understand the phenomena of droplet transport on heated liquid pool. This study aims to better understand and manipulate self-propelled droplets on a heated liquid pool. In the present study, glycerin (involatile) was used for the heated liquid surface. Acetone and ethanol (both volatile) were used for the droplets. We clearly observed the droplet behavior on the heated liquid pool with the radiation thermometer. The levitated and self-propelled droplet of 2 mm was visualized and quantified by varying the pool temperature. Compared with our experimental data, the vapor layer thickness between a droplet and heated liquid pool, and the velocity of self-propelled droplets were well predicted.