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

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.

Numerical Investigation of Sloshing in a Tank: Statistical Description of Experiments and CFD Calculations

“…Various methods are in use for computational estimations of fluid pressures due to sloshing [1][2][3][4][5][6], and that list is by no means exhaustive. It can be also mentioned that during the 1 st ISOPE SDD Symposium [7] a number of interesting, currently stateof-art, approaches have been presented, including the approach employing the ComFLOW code used by authors.…”