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- W4313531772 abstract "Abstract The linearized water-wave radiation problem for a 2D oscillating source in an inviscid shear flow with a free surface is investigated analytically. The singular source is located at the bottom, with constant fluid depth. The velocity of the basic flow varies linearly with depth, assuming uniform vorticity. The far-field surface waves radiated out from the 2D bottom source are calculated, based on Euler’s equation of motion with the application of radiation conditions. The present analysis extends the work by Tyvand and Sveen to include a nonzero surface flow. Doppler effects will arise in a system at rest with the undisturbed free surface. Resonance with zero group velocity will occur at a critical Froude number for the surface flow. In the presence of a basic surface flow, there are in total four radiated waves when the surface flow is subcritical. With supercritical flow, there are only two emitted waves, with downstream propagation. The critical Froude number depends on the surface velocity, the shear rate and the oscillation frequency of the bottom source." @default.
- W4313531772 created "2023-01-06" @default.
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- W4313531772 date "2023-01-03" @default.
- W4313531772 modified "2023-10-18" @default.
- W4313531772 title "Wave Radiation from Bottom Vibrations in Open-Channel Flow with Uniform Vorticity" @default.
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- W4313531772 doi "https://doi.org/10.1007/s42286-022-00073-5" @default.
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