Abstract
A purpose-built device was designed to obtain high-quality experimental fluid dynamics (EFD) data of ship roll decay motions initially. Then, a model experiment was conducted for a slender ship using the proposed device with an accurate optical fibre gyroscope. A few important remarks on EFD were derived through analyses of the measured data. Furthermore, unsteady Reynolds-averaged Navier–Stokes computational fluid dynamics (CFD) simulations of the ship roll decay were performed and compared with the results of EFD. Based on the comparisons, a few remarks on the requirements for CFD were derived, those should be considered in the development of guidelines annexed to the Second-Generation Intact Stability Criteria (SGISC) discussed at International Maritime Organization.
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