Several remarks on EFD and CFD for ship roll decay. (15th August 2019)

• Record Type: Journal Article
• Authors: Hashimoto, Hirotada; Omura, Tomoyuki; Matsuda, Akihiko; Yoneda, Shota; Stern, Frederick; Tahara, Yusuke
• Is Part Of: Ocean engineering. Volume 186(2019)
• Publication Date: 2019-08-15
• Subjects: Roll decay -- EFD -- CFD -- Validation -- Uncertainty -- SGISC; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2019.05.064
• Languages: English
• ISSNs: 0029-8018

Abstract

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. Highlights: A purpose-built device was designed to obtain high-quality EFD data of ship roll decay. A few important remarks on EFD procedure and EFD analysis of ship roll decay were derived. Unsteady RaNS CFD simulations of ship roll decay were performed and compared with EFD results. A few important remarks on requirements for CFD simulation of ship roll decay were derived.