Hydrodynamic modelling and optimisation of flexible oscillating wave surge converters, comparison with rigid-motion devices. *

Oscillating wave surge converters (OWSCs) are wave energy devices which predominantly exploit the horizontal wave-induced fluid motion. This work explores the hydrodynamic modelling and optimisation of flexible OWSCs, similar to seaweed or kelp, arranged in periodic rows. The hydroelastic problem is solved numerically, based on an eigenfunction expansion method, hence generalising previous works on rigid devices. The relative merits of OWSCs with flexible vs rigid modes of deformation are assessed. Optimisation of the deformation mode shape to reduce drag-induced losses is discussed.