マランゴニ効果による多成分液滴の微粒化ダイナミクス

抄録

Surface tension gradients due to concentration and temperature differences are well-known to trigger Marangoni convection. Marangoni effect is extensively studied for industrial applications such as welding and inkjet printing. In the present study, for a further understandings and development of non-contact liquid manipulation, the evaporation, spreading and self-atomization of droplets by Marangoni effect. We present the dynamic behavior of a pure or binary droplet containing a volatile component on an oil pool. To better understand the interplay between the evaporating droplets and spreading/atomization characteristics, the temperature field on the oil pool was visualized and quantified by IR camera. The Marangoni flow driven by the temperature gradient near the liquid film front was estimated and compared with the experimental spreading velocity. As a result, the experimental spreading velocity of liquid film was roughly agreed with the theoretical prediction.