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A study on the coupling effect between sloshing and motion of FLNG with partially filled tanks

Lookup NU author(s): Dr Xin WangORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Springer, 2019.

For re-use rights please refer to the publisher's terms and conditions.


This paper discusses the coupling influence of floating LNG (FLNG) motions with internal liquid sloshing. Model experiments were performed in an ocean model basin, and results were compared with numerical calculations. The FLNG model used in our study had six square tanks. To verify the liquid cargo effect, the FLNG model was tested under two conditions: a liquid cargo condition and a fixed solid-cargo condition. As for filling level, there were three loading conditions (15%, 50%, and 90% filled). Our numerical scheme solves internal liquid sloshing using a three-dimensional finite difference method, and ship motion by potential theory. The sloshing effect was computed by the time-domain coupled simulation. We obtained good agreement between experimental and numerical results even at the near-natural frequency of sloshing. In both experimental results and numerical simulations, the effect of internal liquid is significant for sway and roll motion. Furthermore, the internal free surface motions obtained by the experiments and numerical simulations showed similar non-linear free surface behavior in the case of low filling.

Publication metadata

Author(s): Kawahashi T, Arai M, Wang X, Cheng LY, Nishimoto K, Nakashima A

Publication type: Article

Publication status: Published

Journal: Journal of Marine Science and Technology

Year: 2019

Volume: 24

Issue: 3

Pages: 917-929

Print publication date: 01/09/2019

Online publication date: 26/09/2018

Acceptance date: 15/09/2018

Date deposited: 29/09/2018

ISSN (print): 0948-4280

ISSN (electronic): 1437-8213

Publisher: Springer


DOI: 10.1007/s00773-018-0596-5


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