The microscopic evolution behavior of the interphase interaction between adjacent oppositely charged droplets in air and helium environments is investigated. By means of high-speed microscopy with high spatial and high temporal resolution, a special attention has been paid to the interphase morphology characteristics of oppositely charged droplets with different conductivities and applied voltages, and the dynamic evolution behaviors of noncontact bounce and noncontact breakup under the influence of gas ionization are discussed in detail. The results show that noncontact bounce occurs for low-conductivity droplets, whereas noncontact breakup occurs for high-conductivity droplets as the applied voltage increases gradually and that the occurrence of gas-phase ionization and reaching the Rayleigh limit dominate the changes of interphase interaction behaviors. Droplets of high conductivity mean greater minimum pole spacing when the noncontact bounce or breakup behavior occurs. With the increase of conductivity, the voltage required for noncontact breakup gradually decreases, while the occurrence of noncontact breakup behavior in a helium environment is relatedly lagging. Meanwhile, the minimum pole spacing of noncontact breakup is always greater than that in an air environment, and the changes of the minimum pole spacing in air and helium environments indirectly prove that the noncontact bouncing behavior of adjacent charged droplets is induced by gas ionization. We introduce here the special interphase interaction of adjacent oppositely charged droplets. The occurrence of gas-phase ionization and reaching the Rayleigh limit dominate the changes of interphase interaction behaviors, and the significant differences of the minimum pole spacing d in air and helium environment indirectly prove that the noncontact bouncing behavior of adjacent charged droplets is induced by gas ionization.

中文翻译：

---

气体电离对相邻带相反电荷液滴的相间相互作用的影响

研究了空气和氦气环境中相邻带相反电荷的液滴之间相间相互作用的微观演化行为。通过具有高空间和高时间分辨率的高速显微镜，特别关注具有不同电导率和施加电压的带相反电荷的液滴的相间形态特征，以及非接触反弹和非接触破裂的动态演化行为。气体电离的影响进行了详细讨论。结果表明，低电导率的液滴会发生非接触反弹，而随着施加电压的逐渐增加，高电导液滴发生非接触破裂，并且气相电离的发生和达到瑞利极限主导了相间相互作用行为的变化。当非接触弹跳或破裂行为发生时，高导电性液滴意味着更大的最小极间距。随着电导率的增加，非接触击穿所需的电压逐渐降低，而在氦环境中非接触击穿行为的发生也相应滞后。同时，非接触式分断的最小极距始终大于空气环境中的极距，空气和氦气环境中最小极距的变化间接证明了相邻带电液滴的非接触弹跳行为是由气体电离引起的。我们在这里介绍相邻带相反电荷的液滴的特殊界面相互作用。气相电离的发生和达到瑞利极限主导了相间相互作用行为的变化，空气和氦气环境中最小极距d的显着差异间接证明了相邻带电液滴的非接触弹跳行为是由气体引起的。电离。