Abstract Electrohydrodynamic processes in two-phase immiscible liquids include electrical deformation and coalescence. The latter are primary phenomena in electrostatic phase separation and many other technologies, yet represent a rather challenging issue for numerical simulation, especially when electrical conductivities of phases differ significantly. There are several papers in the literature where computations are distorted with a charge “escape” problem when the space charge emerges far from the interface. The article provides a thorough analysis of the issue and suggests a modification of the numerical model. The key idea is in changing the dependence of the electrical conductivity on fluid volume fraction from a linear to the exponential one. To verify the approach, original experimental data were acquired that lacks typical flaws and are suitable for a quantitative comparison. The use of the data confirms the correctness of the modified numerical model.

中文翻译：

---

相场法模拟两相不混溶液体中电流体动力学过程的改进及其实验验证

摘要 两相不混溶液体中的电流体动力学过程包括电变形和聚结。后者是静电相分离和许多其他技术中的主要现象，但对于数值模拟来说是一个相当具有挑战性的问题，尤其是当相的电导率显着不同时。文献中有几篇论文指出，当空间电荷远离界面时，计算会因电荷“逃逸”问题而失真。这篇文章对这个问题进行了彻底的分析，并建议对数值模型进行修改。关键思想是将电导率对流体体积分数的依赖性从线性变为指数。为了验证该方法，获得原始实验数据，缺乏典型缺陷，适合定量比较。数据的使用证实了修改后的数值模型的正确性。