Abstract
A compound drop is made of a millimetric water drop encapsulated in an oil shell. They are obtained by merging one drop of each component (water and oil). Afterwards, they are laid on a high viscosity oil bath which is vertically vibrated. When the forcing acceleration is higher than a given threshold Γ th, compound drops can bounce on the surface. We show that above a second threshold Γ e > Γ th some oil contained in the shell enters in the inner water droplet forming a stable double emulsion.
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