VIVACE (IMAGE) University of Michigan Caption VIVACE, a new concept in hydrokinetic energy, 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. Credit Scott Galvin Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.