Abbasnia, A. and Guedes Soares, C. (2019), “Hydrodynamic analysis of a land-based oscillating water column device using fully nonlinear numerical wave flume”, Advances in Renewable Energies Offshore, Guedes Soares, C., (Ed.), Taylor & Francis, London, UK, pp. 465-473

A fully nonlinear potential numerical wave flume is developed in the present paper to investigate the hydrodynamic performance of landbased Oscillating Water Column (OWC) devices in the time domain. The boundary integral equation is employed to solve Laplace equation. To satisfy fully nonlinear free surface boundary conditions, the material node approach and fourth-order Runge-Kutta scheme are implemented. Time derivative of the chamber air pressure is derived using air flow and water displacement interior the chamber with considering the air compressibility. Gaussian integration method and fourth-order Runge-Kutta scheme are proposed to determine the chamber air pressure. A convergence test is performed to calibrate the model. Second-order Stokes wave interaction with a flat-bottom OWC is carried out for verification. Interaction of a fifth-order Stokes wave with a stepped-bottom OWC is modeled to show the capability of the present model in fully nonlinear free surface simulation outside and inside the chamber.

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