ID 428

Breakup behaviours of oppositely charged droplet in different media

 

Abstract:

In this paper, a visualization study has been presented on the special behaviour of oppositely charged droplet which noncontact breakup at negative polarity always happen. By means of a high-speed microscopy camera, special attention has been paid to the negative breakup behaviour by comparing air environment with helium media. The results show that breakup polarity selection of oppositely charged droplet has nothing to do with the droplet interface curvature, high voltage electrode polarity and solution pH in air environment, which means the noncontact breakup behaviour always happens at the negative side. However, the noncontact breakup of oppositely charged droplet is first observed at both two sides in helium environment, which demonstrates the gas ionization is found to be responsible for the noncontact breakup at the negative polarity.