Optimization of marine vessels requires that the interaction between hull, propulsion and steering devices, and other appendages is taken into account. In addition, one needs to account for the variable floating position at different operating conditions.
Due to the complexity of all interactions, experimental optimization is both costly and time-consuming. Computational methods can help in predicting efficiently the effects of design changes on resistance and other properties of the vessel. The aim of this paper is to present the results of several validation studies which include both simulations and experiments, demonstrating the ability of CFD to predict not only the trends but also the quantitative variation in resistance due to design changes.