论文标题
定向自行旋转液滴在超养圆柱线上
Directional self-propelled transport of coalesced droplets on a superhydrophilic cylindrical wire
论文作者
论文摘要
在平坦表面上聚集的液滴往往会随着较小的液滴迁移到较大的液滴而最终。我们报告了超直觉的液滴合并模式，在超养圆柱线上，其中较大的液滴被拉向较小的液滴。因此，合并质量的中心显着向较小液滴的原始位置显着移动。这种现象主要是因为在圆柱线上经历的粘性摩擦与液滴的尺寸无正相关，这与在平坦表面上聚集的液滴不同。我们基于质量 - 弹簧抑制剂（MSD）模型进行了维度分析。我们的模型预测各种聚结模式是液滴大小之间比率的函数，并且预测与实验观察匹配。
Droplets coalescing on flat surfaces tend to end up with the smaller droplet migrating into the larger one. We report a counter-intuitive droplet coalescence pattern on a superhydrophilic cylindrical wire, where the larger droplet is pulled toward the smaller one. Consequently, the center of the combined mass significantly moves toward, often beyond, the original location of the smaller droplet. This phenomenon occurs primarily because the viscous friction that a droplet experiences on a cylindrical wire is not positively correlated with the size of the droplet, unlike the droplets coalescing on flat surfaces. We conducted a dimensional analysis based on a mass-spring-damper (MSD) model. Our model predicts a variety of coalescence patterns as a function of the ratio between droplet sizes, and the prediction matches the experimental observation.
