Session: 08-07-02 Internal Flows & FIV II

Paper Number: 86100

86100 - Numerically Analysing Liquid-Cargo Sloshing Diminishment in Partitioned Rectangular Tanks 

The sloshing phenomenon in sea going vessels defines the motion of a liquid in a partially-filled tank. Generated by external forces, the motion consequently generates inertial loads upon a vessel, potentially bringing about vessel instability and compromising tank structural integrity. Accordingly, tank fill limitations have been acknowledged as precautions to prevent high-impact sloshing damage, imposing cargo volume fill limitations to be lower than 10% or higher than 70% of the tank height. The restrictions, however, limits commercial transactions, specifically when handling spot trades and offshore loading/unloading at multiple ports along a shipping route. Due to the circumstances, this study puts forward an analysis of the influence of liquid sloshing upon oscillating vessels by means of numerical modeling. Rectangular cross-sectional tanks incorporating an open-bore and partitioned setups at 20%, 40%, and 60% fill volume levels were implemented to establish the torque and static pressure exerted solely by the fluid dynamics upon oscillation within the tanks. Through verification of dam break dynamics, the sloshing models coupled the explicit volume-of-fluid and non-iterative time-advancement schemes within a computational fluid dynamic solver. Utilising an oscillatory frequency of 1 Hz, the resultant liquid impact reduced within the partitioned setup due to the suppression of wave dynamics.

Presenting Author: Mitchell Borg University of Malta

Authors:

Mitchell Borg University of Malta
Claire Demarco Muscat-Fenech University of Malta
Tahsin Tezdogan University of Strathclyde
Tonio Sant University of Malta
Simon Mizzi University of Malta
Yigit Kemal Demirel University of Strathclyde