Abstract
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 with respect to the manipulation force exerted on the droplet. The pressure and velocity fields in/around the droplet, and their dependencies on temperature and diameter were investigated.
