Abstract
Wave-structure interaction and accurate prediction of wave run-up height induced by ocean waves is essential for safe and cost effective design of fixed and floating offshore structures exposed to a harsh environment. Taking into consideration, wave scattering types identified by Swan et al. (2015) and lateral progressive edge waves, in this paper, the influence of change in underwater volume on the nonlinear wave field surrounding the single fixed monopile and corresponding wave run-up harmonics is investigated. In order to study wave-monopile interaction, the analysis is performed numerically using Unsteady Reynolds-Averaged Navier-Stokes/VOF model based on OpenFOAM® framework. For the simulations, the monopile is assumed vertical and surface piercing with a circular cross-section and the incident wave is considered plane progressive fifth-order Stokes, regular and non-breaking in deep water. The harmonic analysis of local free surface elevation indicates that the scattered wave field around the monopile involves high harmonics wave run-up.
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