Numerical Study of the Collision and Coalescence of Water Droplets in an Electric Field

Authors

  • Mehdi Mohammadi,

    1. Process Simulation and Control Research Laboratory, Chemical Engineering College, Iran University of Science and Technology (IUST), Tehran, Iran
    Search for more papers by this author
  • Shahrokh Shahhosseini,

    Corresponding author
    1. Process Simulation and Control Research Laboratory, Chemical Engineering College, Iran University of Science and Technology (IUST), Tehran, Iran
    • Process Simulation and Control Research Laboratory, Chemical Engineering College, Iran University of Science and Technology (IUST), Tehran, Iran

    Search for more papers by this author
  • Mahmoud Bayat

    1. Petroleum Refining and Processing Technology Development Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
    Search for more papers by this author

Abstract

The coalescence of binary water droplets in oil exposed to an external electric field is simulated using a model including both electrostatic and hydrodynamic sections. Available mathematical models for electric dipole-dipole force are presented in the first part of the model. Volume of Fluid approach is applied in the second part of the model. The simulation results were in good agreement with the published experimental observations. The results indicated that an improvement in electrocoalescence speed could be achieved. It was also revealed that the skew angle of the electric field, the oil viscosity, and the initial drops distance influence the electrocoalescence. Moreover, a correlation was developed to predict electrocoalescence kinetic as a function of the participant parameters.

Ancillary