TY - JOUR

T1 - A modification of the phase-field method to simulate electrohydrodynamic processes in two-phase immiscible liquids and its experimental verification

AU - Chirkov, V. A.

AU - Газарян, Альберт Владимиович

AU - Kobranov, K. I.

AU - Utiugov, G. O.

AU - Dobrovolskii, I. A.

PY - 2020/9

Y1 - 2020/9

N2 - 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.

AB - 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.

KW - Electrodeformation

KW - Experimental data

KW - Fluid-fluid interface

KW - Interfacial tension

KW - Numerical simulation

KW - Water-oil emulsion

KW - DROPS

KW - LEVEL-SET

KW - ELECTRIC-FIELD

KW - TENSION

KW - ELECTROCOALESCENCE

KW - COALESCENCE

KW - OIL DROPLETS

KW - DYNAMICS

KW - AGGREGATION

KW - WATER DROPLETS

UR - http://www.scopus.com/inward/record.url?scp=85086598814&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/ebe09ff5-46fa-3ed6-b773-522808ba49f8/

U2 - 10.1016/j.elstat.2020.103483

DO - 10.1016/j.elstat.2020.103483

M3 - Article

AN - SCOPUS:85086598814

VL - 107

JO - Journal of Electrostatics

JF - Journal of Electrostatics

SN - 0304-3886

M1 - 103483

ER -