Numerical Analysis of Wave Propagation Under Various Seabed Conditions

摘要

In this study, a two-domain numerical wave tank is developed to simulate wave propagation for wave-porous domain interaction. The numerical model consists of two domains: fluid domain and porous domain. The upper domain is assumed to be potential flow domain. The lower porous domain is defined as an incompressible porous media with Darcy's law. The interaction between fluid and porous domain is considered on seabed interface. The boundary element method with Runge-Kutta 4^{th- order integration scheme is adopted to simulate time-varying surface waves. For each sub-time step of the simulation, three step calculation is carried out. Using the developed model, wave propagations over porous sea bottom with various slopes are investigated and the change of wave amplitude are analyzed.}