Study on wave amplification using circular and elliptical plates

Bathymetry induced focusing can be used to improve the efficiency of different wave energy devices by amplifying the wave height at the focal region. Different wave focusing devices have been tested in the past to increase the power extracted from ocean waves. In the present study, wave amplification caused by submerged elliptical and circular plates is modeled using Delft3D. Submerged horizontal plates produce more amplification than the mounds of same width. Amplification produced by circular plates is equal to that of elliptical plates. Wave amplification is more when the depth of submergence of plate below the free surface is less, provided it does not induce wave breaking. Wave amplification increases with increase in plate width up to half the wave length. Beyond relative depth greater than 0.25, depth does not affect wave amplification. These circular plates can be used to increase the efficiency of all types of wave energy devices.