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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Afanasyev, Yakov Korabel, Vasily |
| Copyright Year | 2003 |
| Abstract | Rapidly moving storm crossing the shelf from shallow water to deep water can generate tsunami-like waves which can cause local flooding and damage to docks when the waves hit the coast. We report on laboratory experiments to examine the reflection of waves generated by a moving disturbance from the shelf. Experiments are performed in a two-layer fluid consisting of a layer of oil based ferrofluid lying on top of a layer of water with step bottom. The disturbance is generated by a permanent magnet moving above the surface of ferrofluid. Digital images of the flow are analyzed to obtain the evolution of the wave field. The experimental flows demonstrate two distinct regimes, namely subcritical when the speed of the magnet is less than the phase speed of the wave, and supercritical when the speed of the magnet is greater than the phase speed of the wave. In subcritical regime the disturbance is localized and its size is determined by the spatial extent of the forcing. In supercritical regime the waves form two beams extending at “Mach angle” with respect to the direction of motion. Oblique wave incident on the shelf can experience total reflection if the angle between the wave front and the shelf is greater than a critical value. |
| Sponsorship | Ocean, Offshore, and Arctic Engineering Division |
| Starting Page | 453 |
| Ending Page | 457 |
| Page Count | 5 |
| File Format | |
| ISBN | 0791836835 |
| DOI | 10.1115/OMAE2003-37045 |
| e-ISBN | 079183672X |
| Volume Number | Volume 3: Materials Technology; Ocean Engineering; Polar and Arctic Sciences and Technology; Workshops |
| Conference Proceedings | ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering |
| Language | English |
| Publisher Date | 2003-06-08 |
| Publisher Place | Cancun, Mexico |
| Access Restriction | Subscribed |
| Subject Keyword | Water Gravity (force) Reflection Permanent magnets Floods Waves Flow (dynamics) Magnets Shorelines Fluids Storms Ferrofluids Damage Tsunamis |
| Content Type | Text |
| Resource Type | Article |
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