Excitation of standing gravity-capillary waves at an interface between two immiscible liquids by a periodic sequence of ultrasound pulses

Resumo

The experimental characterization of gravity-capillary waves excited at an interface between two immiscible liquids by a periodic sequence of focused ultrasound pulses propagating perpendicular to the interface is presented. The experiments have been performed in a glass cylinder filled with two liquids: Fluorinert FC70 and silicone oil. The spatial and temporal evolution of the interface deformation is recorded by a high-speed video camera. The effect of the duration and amplitude of ultrasound pulses on the amplitude and shape of interfacial oscillations is analyzed. Prospects of the proposed approach and possible applications of the observed phenomena are discussed.