CFD application to prediction of ship motions and forces in regular head wave using URANS approach

Abstract

The present study provides the unsteady Reynolds Averaged Navier-Stokes (URANS) simulation for the prediction of added resistance and motions of KCS (KRISO Container Ship) advancing forward in regular waves which is one of the benchmark test cases of CFD Workshop 2015. The pitch and heave motions are solved in the non-inertial reference frame in which the effects of the motions are considered as a body force source term in the governing equations. The computational results are compared with the experimental results provided by FORCE technology. The computations were carried out for total five different wave length conditions from 0.65 to 1.95. The time histories of the total resistance (CT), heave and pitch for the comparison are reconstructed from the Fourier series in both the computation and the experiment. Each harmonic amplitude and phase are also compared. Although the present method uses non-inertial reference frame for ship motion which has a weakness for large amplitude motion cases, it showed relatively good agreement with the results obtained from the experiment in time history comparison.