Vicky Stratigaki

Phase-Resolving Wave Propagation Array Models

Abstract This chapter describes the use of a phase-resolving wave propagation model, MILDwave (based on the mild-slope equations), for assessing the park effect in arrays of wave energy converters (WECs) and the far-field wake effects of the arrays. The implementation of the WEC (array) is carried out using the numerical techniques of so-called sponge layers and wave generation along a circle, to simulate the physical process of energy absorption by the WEC, and the resulting wave transformation processes of reflection, diffraction, and radiation. A generic coupling methodology is presented for modelling accurately both the wave energy absorption by the WEC and the propagation of the perturbed wave field over larger distances, allowing the study of the coastal impact of arrays. The approach is applied in a practical situation to study the wave height reduction behind a single WEC and a farm of WECs, and advantages and limitations are discussed.