RANS Simulation of the Heave Performance of a Two-Body Floating-Point Absorber Wave Energy System


Y-H. Yu and Y. Li, Computers & Fluids, October, 2012

Abstract

This paper presents our recent numerical study on a point absorber wave energy conversion (WEC) system using a Reynolds-averaged Navier-Stokes (RANS)-based computational fluid dynamics (CFD) method. The device we studied is a two-body floating-point absorber (FPA), which operates in heave and generates energy from the relative motion between the two bodies. A series of numerical simulation was performed to analyze the hydrodynamic response and the power absorption performance of the system in regular waves. Overall, it was successful to use the RANS method to model the complex hydrodynamics interaction of the FPA system. We demonstrated the significance of the nonlinear effects, including viscous damping and wave overtopping. The study showed that the nonlinear effects could significantly influence the power output and the motion of the FPA system, particularly in larger waves.

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