Open Access

ARTICLE

Numerical Investigation of a Hybrid Wave Absorption Method in 3D Numerical Wave Tank

Chengxi Li¹

1 Massachusetts Institute of Technology, Cambridge, MA, USA

Computer Modeling in Engineering & Sciences 2015, 107(2), 125-153. https://doi.org/10.3970/cmes.2015.107.125

Abstract

Applying an efficient numerical wave absorption method is very important for realization of an open sea condition especially for long time numerical fluid structure interaction simulation. This paper proposed a hybrid numerical wave absorption method for the fully nonlinear fluid structure simulation. A numerical code “QBEM” which is based on the quadratic boundary element method is applied to evaluate the efficiency of the wave absorption methods and damping schemes by checking the energy conservation and wave elevation in the computational domain. Specifically, we conduct a 3D numerical wave tank experiment to find the bestperforming damping scheme inside the damping zone and the associated optimal ramp shape. In addition, different damping coefficients, phase velocities and numerical domain sizes are introduced and compared by the numerical wave tank in order to evaluate their influences on the numerical wave absorption. At last, the most accurate and efficient hybrid numerical wave absorption method is introduced and validated by the comparison between the numerical results and physical wave tank experiments.

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Keywords

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