This paper describes a numerical analysis of sloshing in liquid cargo tanks of membrane-type liquefied natural gas (LNG) carriers in a rough sea. The numerical method used in this study is based on a finite-difference method, in which impact pressure on the tank ceiling is treated accurately by a numerical boundary condition proposed by the authors. Tank motion with six degrees of freedom was given by the response amplitude operator of a ship, and sloshing that occurs in regular and irregular waves is examined. An ISSC wave spectrum is used to generate the irregular waves. We describe the influence of 3D effects due to tank motion and tank geometry on the sloshing flow, and show the strong relation of the sloshing to the frequency of the given ship motion. Comparison of the numerical results with the measured data shows the effectiveness of the presented 3D analysis method.
- Ocean, Offshore, and Arctic Engineering Division
Numerical and Experimental Study of 3-D Sloshing in Tanks of LNG Carriers
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Arai, M, Makiyama, HS, Cheng, L, Kumano, A, Ando, T, & Imakita, A. "Numerical and Experimental Study of 3-D Sloshing in Tanks of LNG Carriers." Proceedings of the 25th International Conference on Offshore Mechanics and Arctic Engineering. Volume 1: Offshore Technology; Offshore Wind Energy; Ocean Research Technology; LNG Specialty Symposium. Hamburg, Germany. June 4–9, 2006. pp. 763-770. ASME. https://doi.org/10.1115/OMAE2006-92235
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