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Water goes-the new way to rock jumping

Credit: Utah State University Researchers at Utah State University's Splash Lab discovered a new way of watering hopes for the term "waterwalk". In collaboration with researchers at the Naval Undersea Warfare Center in Newport, RI and Brown University, Utah State University assistant professor of mechanical engineering Tadd Truscott and his associates at the USU Splash Lab have dismissed the physics of how elastic spheres "go" to water. Their results have recently been published in the prestigious research journal Scientific Reports . This research not only reveals the physics of how elastic spheres interact with water but also lays the foundation for the future design of water-walking drones. Truscott team used high-speed cameras to record elastomeric balls that jump over a tank of water. Water migration occurs when elastic spheres get significant speed over the first several effects, which means that the sphere maintains a deformed oblong shape, like a stone you can find near the beach. This behavior is characterized in that the sphere moves almost parallel to the water surface with the tip of the oblong shape dipping under the water surface with each rotation while the shorter sides pass just above, giving the impression that the sphere is passing over the water. "Although this has been a long study, the new locations we discovered make it easier for us to predict that we are using the technology for practical uses such as water-migrating drones," says Truscott. Utah State University Assistant Professor of Mechanical Engineering Tadd Truscott and his…

Credit: Utah State University

Researchers at Utah State University’s Splash Lab discovered a new way of watering hopes for the term “waterwalk”.

In collaboration with researchers at the Naval Undersea Warfare Center in Newport, RI and Brown University, Utah State University assistant professor of mechanical engineering Tadd Truscott and his associates at the USU Splash Lab have dismissed the physics of how elastic spheres “go” to water. Their results have recently been published in the prestigious research journal Scientific Reports .

This research not only reveals the physics of how elastic spheres interact with water but also lays the foundation for the future design of water-walking drones.

Truscott team used high-speed cameras to record elastomeric balls that jump over a tank of water. Water migration occurs when elastic spheres get significant speed over the first several effects, which means that the sphere maintains a deformed oblong shape, like a stone you can find near the beach.

This behavior is characterized in that the sphere moves almost parallel to the water surface with the tip of the oblong shape dipping under the water surface with each rotation while the shorter sides pass just above, giving the impression that the sphere is passing over the water.

“Although this has been a long study, the new locations we discovered make it easier for us to predict that we are using the technology for practical uses such as water-migrating drones,” says Truscott.

Utah State University Assistant Professor of Mechanical Engineering Tadd Truscott and his associates at USU’s Splash Lab have unraveled the physics of how elastic spheres “go” on water. Credit: Utah State University College of Engineering

The team discovered that there are two different types of water hiking. The first type jumps once every full rotation and the other jumps twice each full rotation. This difference can be controlled by an equation that can predict the number of jumps that will occur.

Truscott said that this research provides new insights on water impact physics – an important field of study in sea operations and marine and marine technology. [19659012] Hiking on water: Scientists unravel the science of jumping spheres


More information:
Randy C. Hurd et al. Water migration as a new location for free surface jumping, Scientific Reports (2019). DOI: 10.1038 / s41598-019-42453-x

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Water goes-the new way to rock jump (2019, April 23)
April 23, 2019
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