Dynamics of a dielectric droplet suspended in a magnetic fluid in electric and magnetic fields

TL;DR

This study experimentally investigates the behavior and deformation of dielectric droplets in magnetic fluids under electric and magnetic fields, revealing droplet shapes, bursting phenomena, and electrorotation, with theoretical interpretation of the dynamics.

Contribution

It provides new experimental insights and theoretical analysis of dielectric droplet dynamics in magnetic fluids under combined electric and magnetic fields.

Findings

Droplets deform into oblate ellipsoids, tori, and curved tori with increasing electric field.

Droplet bursting occurs at high electric fields.

Electrorotation of deformed droplets is observed and analyzed.

Abstract

The behavior of a microdrop of dielectric liquid suspended in a magnetic fluid and exposed to the action of electric and magnetic fields is studied experimentally. With increasing electric field, the deformation of droplets into oblate ellipsoid, toroid and curved toroid was observed. At the further increase in the electric field, the bursting of droplets was also revealed. The electrorotation of deformed droplets was observed and investigated. The influence of an additional magnetic field on the droplet dynamics was studied. The main features of the droplet dynamics were interpreted and theoretically examined.