Numerical study on a hybrid water wave radiation condition by a 3D boundary element method

Abstract

Based on the constant boundary element method in a 3D numerical wave tank, a hybrid radiation condition which is the composition of the multi-transmitting formula (MTF) method and the damping zone is studied. Numerical solutions show excellent agreements with the analytical ones, which verify the effectiveness of the hybrid method. This method can be considered as a trimming of the MTF condition, or an extension of the damping zone method, and has good ability of simulating irregular waves with relatively large frequency span.