Abstract
As basic research to understand the behavior of droplets on structured surfaces, we investigated droplet movement in a V-shaped groove while the volume of the droplet changes. We developed a model to explain the mechanism of the droplet movement and the effects of the wettability of the inner walls of the groove on the droplet movement. Furthermore, the model predicted new phenomena and explains the effect of the nonhomogeneous wettability on droplet movement. The predictions of the model match the experimental results well. This research can provide the basic knowledge for manipulating droplets with structured surfaces for various applications.
Highlights
As basic research to understand the behavior of droplets on structured surfaces, we investigated droplet movement in a V-shaped groove while the volume of the droplet changes
Effectiveness of the structured surfaces for the droplet manipulation has been proved by previous research
The reason of the flooding is that the adhesion energy can be increased when the number of the nucleated condensates increases, because nucleated condensates are generally pinned inside the structures
Summary
As basic research to understand the behavior of droplets on structured surfaces, we investigated droplet movement in a V-shaped groove while the volume of the droplet changes. The model predicted new phenomena and explains the effect of the nonhomogeneous wettability on droplet movement. The movement of a suspended droplet in a V-shaped groove was investigated to understand the behavior of droplets on structured surfaces. The model expected new phenomena and explains the effect of the nonhomogeneous wettability on the droplet movement. The model that explains the movement of a suspended droplet in a V-shaped groove was created on the basis of three assumptions. Because the normal force on the central plane can be neglected, we used a two-dimensional model to explain the behavior of the droplet in the V-shaped groove www.nature.com/scientificreports/
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