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VIVACE can harness energy from "vortex-induced vibrations" in slow-moving ocean and river currents. Vortices in the fluid flow move the device, which is passive. A vortex can be seen in this photo.
An artist's illustration of an array of VIVACE converters on the ocean floor.
Michael Bernitsas, professor in the Department of Naval Architecture and Marine Engineering, stands before a prototype of his VIVACE hydrokinetic energy device.