Application of CFD method for ship added resistance tests with coupled sloshing effects

The coupling effect of sloshing has been extensively studied concerning ship stability in waves. With the development of new marine equipment, hydrodynamics problems related to this coupling effect are becoming increasingly significant in marine engineering. Computational Fluid Dynamics (CFD) offers a robust approach to address these complexities associated with the sloshing-coupled issue, given its capability to model nonlinear flows and complex tank geometries. This study develops a CFD model using the commercial software to validate its effectiveness in addressing sloshing-coupled problems through ship added resistance tests. The model incorporates a moving ship carrying two internal tanks, with the coupling effect excited by external waves and internal sloshing flow. To validate the numerical model, ship is free in surge, heave, and pitch motions are examined under various wavelengths and filling conditions. Observations of sloshing flow are presented alongside analysis of wave-induced motion and resistance. The computational results from CFD demonstrate reasonable agreement with the experimental measurements and potential-based computations, particularly in cases with significant coupling effects.