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This study investigates how different parameters affect the coalescence of water droplets within an oil phase, specifically in a unique concentric semi-elliptic non-uniform electric field configuration. Numerical simulations are used to investigate droplet electro-coalescence systematically. The level set method is applied to investigate binary droplet collisions in the presence of an external electric field. In addition to field geometry, this study explores parameters such as droplet separation distance, boundary design, and initial skew angle. Increased electric field intensity and closer droplet spacing enhance electro-coalescence, according to experimental data that supports electrostatic theories. The study discovered that a larger b/a ratio led to stronger forces and faster coalescence, with a scale factor of 0.5 being ideal. Increasing voltage also decreased the droplet time to attain electric potential. Moreover, alignment accelerates the coalescence process, which is dependent on the skew angle of the electric field. Improving electrode designs for efficient electro-coalescence is one of the research’s implications.

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Numerical Simulation of Electro-coalescence Enhancement via Novel Non-uniform Electric Field Design

  • 会议论文

  • 发表日期：

    2026年

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  • Mayur Chaudhari,
  • Tejas Kolte,
  • Ajinkya Jadhav,
  • Mahesh Goudar,
  • Pramod Kothmire

摘要

This study investigates how different parameters affect the coalescence of water droplets within an oil phase, specifically in a unique concentric semi-elliptic non-uniform electric field configuration. Numerical simulations are used to investigate droplet electro-coalescence systematically. The level set method is applied to investigate binary droplet collisions in the presence of an external electric field. In addition to field geometry, this study explores parameters such as droplet separation distance, boundary design, and initial skew angle. Increased electric field intensity and closer droplet spacing enhance electro-coalescence, according to experimental data that supports electrostatic theories. The study discovered that a larger b/a ratio led to stronger forces and faster coalescence, with a scale factor of 0.5 being ideal. Increasing voltage also decreased the droplet time to attain electric potential. Moreover, alignment accelerates the coalescence process, which is dependent on the skew angle of the electric field. Improving electrode designs for efficient electro-coalescence is one of the research’s implications.