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Assessment of Transient Sloshing Due to Encounter of an LNG Carrier With a Steep Wave

[+] Author Affiliations
Sebastian Schreier, Mathias Paschen

University of Rostock, Rostock, Germany

Bernhard Godderidge, Stephen Turnock, Mingyi Tan

University of Southampton, Southampton, UK

Nick Cowlan

BMT Seatech Ltd., Southampton, UK

Paper No. OMAE2009-79080, pp. 253-262; 10 pages
doi:10.1115/OMAE2009-79080
From:
  • ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV
  • Honolulu, Hawaii, USA, May 31–June 5, 2009
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4345-1 | eISBN: 978-0-7918-3844-0
  • Copyright © 2009 by ASME

abstract

This study investigates a transient sloshing flow in a rectangular tank by comparing model tests and unsteady Reynolds-Averaged Navier-Stokes CFD simulation. The sloshing flow is excited by a normally periodic surge motion, which is then subjected to a transient akin to an LNG carrier encountering a particularly steep wave. It is found that the impact pressure recorded in the transient motion is several times greater than that observed at resonance. High speed video data and CFD simulation is used to analyse the sloshing flow. The severity is explained by the absence of entrained air bubbles prior to impact and the second mode response one half period before impact.

Copyright © 2009 by ASME

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