A model for a paddle-type wavemaker coupled to 2D fluid flow over a plane beach is studied. For purely outgoing wave motion, we find that the wavemaker has positive and negative added moment of inertias. When the wavemaker is used to extract energy, the efficiency is found to be at most 100% which is achieved when there is no reflected wave. (C) 2004 Elsevier Ltd. All rights reserved.
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