The droplet angle plays a key role in affecting electro-coalescence behavior of water droplets in oil. This work delves into the impact of the droplet angle on electrostatic coalescence in the high-frequency pulsed electric field by experiments and molecular dynamics simulations. Our findings revealed that a pulsed electric field promotes droplet coalescence before the droplets physically contact each other. Upon contact, notable oscillations ensue, with the electric field forces showing an adverse impact on the coalescence process. Depending on the degree of deformation, the droplet exhibits primary and secondary polarization states. Droplets exhibit a tendency to move apart when the initial droplet angle exceeds 75.93°, due to the same-charge repulsion and insufficient torque. An increase in the center distance ratio of droplets inhibits coalescence, resulting in a negative value in the decreasing rate of the droplet angle. These research findings offer valuable insights into improving the electrostatic demulsification process.

中文翻译：

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高频脉冲电场下液滴角度对液滴聚结的影响：实验和分子动力学模拟


液滴角度在影响油中水滴的电聚结行为方面起着关键作用。这项工作通过实验和分子动力学模拟，深入研究了高频脉冲电场中液滴角度对静电聚结的影响。我们的研究结果表明，脉冲电场在液滴彼此物理接触之前促进了液滴聚结。接触后，会发生明显的振荡，电场力对聚结过程产生不利影响。根据变形程度，液滴表现出初级和次级偏振态。当初始液滴角度超过 75.93° 时，由于同电荷排斥和扭矩不足，液滴表现出分开的趋势。液滴中心距比的增加抑制了聚结，导致液滴角度的减小率为负值。这些研究结果为改进静电破乳过程提供了宝贵的见解。