Figure 6.

Amplitude of perturbations on the interface as a function of flow time for different actuation amplitudes. The lines are fitted to the experiments and are matched to horizontal lines that represent the zero-growth under tension immediately after the junction ($0<t<0.1s$). Inset: initial perturbation amplitude ${\epsilon }_0$ as a function of the amplitude of the voltage applied to the piezo-electric disc. ($r_0=16\mu \mathrm{m},U=4.5\mathrm{mm}\mathrm{/}\mathrm{s},f=28\mathrm{Hz}$.)