マイクロ液滴駆動へのラプラス圧と温度差マランゴニ対流による影響

抄録

The purposes of this study are to demonstrate numerically the droplet manipulation utilizing the Marangoni effect and to investigate the acting force magnitude and the flow relevant to the droplet movement. The analysis object is an oil droplet suspended in water (liquid-liquid two-phase flow). The liquid-liquid interface is captured by the Volume-ofFluid method, and the surface tension model we used here is the Continuum-Surface-Force method with considering the temperature dependency. We confirmed a quantitative agreement with experimental and theoretical results in terms of dependences of the driving force and velocity on the temperature difference and droplet diameter. We investigated the effects of Laplace pressure and thermal Marangoni convection on the droplet driving.