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<p>Background: Non-uniform electric fields enhance collision and coalescence of dispersed droplets in oil–water emulsions for rapid separation. Single factor analyses on droplet electrocoalescence have revealed laws, but few researchers have analyzed synergies between factors. Methods: In this work, based on the pre-designed matrix electrode structure, a droplet-pair contact time model was constructed, and the response surface maps were plotted using the response surface methodology (RSM), which not only discusses and analyses the synergistic effect between the main factors but also optimizes to obtain the best electric field parameters. Significant Findings: Results showed that the optimal electrode center distance, radius, and voltage amplitude are 12.8&#xa0;mm, 2&#xa0;mm, and 2000&#xa0;V, respectively. After optimization, droplet pair contact time reduced to 268&#xa0;ms. This study explores multi-factor interactions of electrocoalescence in non-uniform matrix electric fields, enhances understanding of droplet electrocoalescence kinetics, and potentially guides electrocoalescence device design.</p>

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Analysis and optimization of droplet pairs electrocoalescence under matrix electrodes

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Sai Huang,
  • Ling Chen,
  • Lingbo Huang,
  • Boping Ren,
  • Ping OuYang,
  • Yun Wu,
  • Yongliang Li,
  • GuangMing Jiang

摘要

Background: Non-uniform electric fields enhance collision and coalescence of dispersed droplets in oil–water emulsions for rapid separation. Single factor analyses on droplet electrocoalescence have revealed laws, but few researchers have analyzed synergies between factors. Methods: In this work, based on the pre-designed matrix electrode structure, a droplet-pair contact time model was constructed, and the response surface maps were plotted using the response surface methodology (RSM), which not only discusses and analyses the synergistic effect between the main factors but also optimizes to obtain the best electric field parameters. Significant Findings: Results showed that the optimal electrode center distance, radius, and voltage amplitude are 12.8 mm, 2 mm, and 2000 V, respectively. After optimization, droplet pair contact time reduced to 268 ms. This study explores multi-factor interactions of electrocoalescence in non-uniform matrix electric fields, enhances understanding of droplet electrocoalescence kinetics, and potentially guides electrocoalescence device design.