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.
CITATION STYLE
Chirkov, V. A., Gazaryan, A. V., Kobranov, K. I., Utiugov, G. O., & Dobrovolskii, I. A. (2020). A modification of the phase-field method to simulate electrohydrodynamic processes in two-phase immiscible liquids and its experimental verification. Journal of Electrostatics, 107. https://doi.org/10.1016/j.elstat.2020.103483
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