Electrically Induced Liquid–Liquid Phase Transition in a Floating Water Bridge Identified by Refractive Index Variations

A horizontal electrohydrodynamic (EHD) liquid bridge (also known as a “floating water bridge”) is phenomenon that forms when high voltage DC (kV·cm−1) applied to pure in two separate beakers. The bridge, free-floating connection between the beakers, acts cylindrical lens and refracts light. Using an interferometric set-up with line pattern placed background of light passing through split into horizontally vertically polarized component which are both projected image space front small vertical offset (shear). Apart from 100 Hz waviness due resonance effect power supply vortical structures at onset spikes increased refractive index moving were observed. These can be explained by electrically induced liquid–liquid phase transition vibrational modes molecules couple coherently.