非均匀交变电场下液滴破碎与分散行为实验研究

Experimental Study on Droplet Fragmentation and Dispersion Under Heterogeneous Alternating Electric Field

本文基于显微高速摄像技术以及PIV技术实验研究了非均匀交变电场下液滴在不相溶介电液体中的变形、破碎和分散等复杂电流体动力学行为,精确捕捉了不同电场条件下荷电液滴动态行为过程的显微形貌特征以及流动特性,获得了荷电液滴特殊破碎形态,发现了液滴破碎过程中微尺度液滴的形成途径,归纳得到了莲状、冠状两种液滴破碎模式,分析了电参数对不相溶液-液多相分散过程的影响规律。

In this study,the complex electrohydrodynamic behaviors of droplets in immiscible dielectric liquids under non-uniform alternating electric fields was studied based on experimental research using high-speed microscopy and PIV techniques.The microscopic morphological features and flow characteristics of charged droplets under different electric field conditions were captured accurately,and the special fragmentation patterns of charged droplets were obtained.The formation pathways of microscale droplets during the droplet fragmentation process are discovered,and two types of droplet fragmentation modes are summarized:lotus-shaped and crown-shaped.The impact of electrical parameters on the dispersion process of immiscible liquid-liquid multiphase systems was analyzed.