The phenomenon of droplets impacting fiber has important applications in the recovery of waste liquid, separation of solid and liquid phases, gas and liquid phases, and glass wool manufacturing. This study explored the impact of droplets on fiber based on the many-body dissipative particle dynamics (MDPD) method. First, the impact of droplets on fiber at different angles was simulated, and the results were found to be in good agreement with the experimental results. We then investigated the influence of droplet eccentricity, fiber tilt angle, and wettability on the collision results and found that droplet critical velocity $V*$, wetting length L, contact time t, and droplet capture rate all increased with tilt angle and decreased with the increase in eccentricity. In addition, fiber wettability had little effect on contact time t but had a greater effect on critical velocity $V*$. Except for hydrophobicity, wettability also had little effect on droplet capture rate. The theoretical derivation obtained the analytical formulas of critical velocity $V*$, dimensionless wetting length $L*$, and dimensionless contact time $t*$ when the eccentric droplet hits the inclined fiber. The simulation results are highly consistent with the theoretical values. This research possesses important guiding significance for actual production and life.

中文翻译：

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偏心液滴冲击倾斜纤维的多体耗散粒子动力学研究

液滴撞击纤维的现象在废液的回收，固相和液相的分离，气相和液相的分离以及玻璃棉的制造中具有重要的应用。这项研究基于多体耗散粒子动力学（MDPD）方法探索了液滴对纤维的影响。首先，模拟了液滴在不同角度对纤维的冲击，结果与实验结果吻合良好。然后我们研究了液滴的偏心距，纤维倾斜角和润湿性对碰撞结果的影响，发现液滴的临界速度$\mathrm{伏特}*$，润湿长度L，接触时间t和液滴捕获率都随倾斜角而增加，而随偏心率的增加而减小。另外，纤维的润湿性对接触时间t的影响很小，但对临界速度的影响更大。$\mathrm{伏特}*$。除了疏水性以外，润湿性对液滴捕获率的影响也很小。理论推导得出了临界速度的解析公式$\mathrm{伏特}*$，无因次润湿长度 $\mathrm{大号}*$以及无量纲的接触时间 $Ť*$当偏心液滴撞击倾斜纤维时。仿真结果与理论值高度吻合。该研究对实际生产和生活具有重要的指导意义。