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Research Bulletin by RS

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

1. . Gavory, .. de Seze. Sloshing in membrane LNG carriers and its consequences from a designer's perspective. Available at: http://www.gtt.fr/sites/gt1/files/2012_sloshing-membrane-lng-car-riers-and-its-consequences-from-designs-perspective-2009-pdf-1 -1-mo.pdf. (accessed at 20.08.2016).
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9. N. Tryaskin, I. Tkachenko, A. Dukarskiy, V. Yakimov, V. Tryaskin, D. Kiselev. Simulation of the Sloshing in the Prismatic Gas Tank after Impact Interaction of the Vessel with Ice Barrier. Proceedings of the Twenty-second (2012) International Offshore and Polar Engineering Conference. 2012.
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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"Russianmaritimeregisterofshipping",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
Article (.pdf):  Download


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