Numerical simulation of sloshing during roll motion under regular wave excitation in the membrane tank of a LNG carrier

Authors: M.S. Boyko, K.A. Dobrzhinsky, I.V. Tkachenko

Abstract

The results of numerical simulation of sloshing in the membrane tank of a LNG carrier during roll motion under regular wave excitation are presented. The Reynolds averaged Navier-Stokes equations are used. To estimate free surface elevation the Volume-of-Fluid (VoF) method is applied. The verification of the used software is presented. Roll-RAO is obtained using the linear theory of roll motion. The purpose of this study is to estimate the pressure change on the membrane tank wall of a LNG carrier. The results are compared with the design pressure value obtained from Rules for the Classification and Construction of Ships Carrying Liquefied Gases in Bulk. The evaluative results are obtained using simplified methods. Several variants of filling levels (10%, 50%, 75% and 90%) are investigated. Liquefied natural gas motion is simulated using open source code OpenFOAM.

Keywords: sloshing, LNG, loads, volume of fluid method, regular wave excitation, roll motion, viscous liquid.

References

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About authors

Maxim Boyko - PhD, FAI "Russian maritime register of shipping", 8, Dvortsovaya Naberezhnaya, 191186, St. Petersburg, Russia
boyko.ms@rs-class.org


Kazimir Dobrzhinsky - FAI "Russian maritime register of shipping", 8, Dvortsovaya Naberezhnaya, 191186, St. Petersburg, Russia
dobrzhinsky.ka@rs-class.org


Igor Tkachenko - DSc, professor, FSEI State Marine Technical University, 3, Lotsmanskaya st., 190121, St. Petersburg, Russia


Issue: 44/45 (2016)






For citation: M.S. Boyko, K.A. Dobrzhinsky, I.V. Tkachenko. Numerical simulation of sloshing during roll motion under regular wave excitation in the membrane tank of a LNG carrier. Research Bulletin by Russian Maritime Register of Shipping. 2016, No. 44/45, pp. 50-55.

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UDC:  532.54
Pages:  50-55