Figure 2
From: Self organization of exotic oil-in-oil phases driven by tunable electrohydrodynamics
Transition from strong to weak hydrodynamics.
a, Time evolution of the surface topology of a single drop at an electric field E = 5.1 V/µm and f = 0.5 Hz. The electric field is parallel to the plane of the page, pointing vertically upwards. b, Left: snapshot of a cloud of droplets with the timeline of each droplet overlaid. Right: the rms velocity vrms of moving droplets plotted against applied electric field intensity E2 during one period of oscillation (f = 0.03 Hz) exhibits two thresholds: one indicating onset of steady motion and the second, the onset of chaotic motion. c, The in-plane deformation of droplets at E = 12 V/µm and f = 1 Hz, 2 Hz and 3 Hz. In b and c, the electric field is perpendicular to the plane of the page. d, The droplets become more circular (χ more narrowly distributed near unity) as the frequency is increased from 1 to 3 Hz.
