The movement and coalescence of binary water droplets falling in stagnant oil exposed to an external electric field is studied. The electrostatic forces in competition with the viscous forces effect on electrocoalescence of the droplets. An electrohydrodynamic (EHD) model is developed based on Computational Fluid Dynamics technique in conjunction with an electrostatic model. Volume of Fluid (VOF) approach is applied in the hydrodynamic model which able to consider circulation streams inside and outside of drops, surface tension effects and interface tracking. The effect of applied voltage amplitude, initial distance between the drops, and skew angle of the electric field are investigated. Both the simulation and experimental results verified an improvement in electrocoalescence rate could be achieved using either a stronger electric field or closer drops. It was also revealed that a larger skew angle of the electric field slows down the approaching movement of the drops until they become relatively aligned with the field. The numerical results are compared and validated against the experimental observations. The velocity vectors and the pressure profiles are analyzed to improve understanding of the microscale phenomena in electrocoalescence. (C) 2016 Elsevier B.V. All rights reserved.