Effects of Tank Motion on Oil Spilling from Damaged Oil Tanks

摘要

The grounded or collided oil tankers are often subjected to periodicmotions, which excites the liquid sloshing inside the cargo tanks andinfluences the oil spilling. This paper presents a systematic numericalinvestigation of the effects of the tank motions on the oil spilling fromdamaged oil tanks by using a VOF-based multiphase flow solver withthe assistance of dynamic mesh techniques. For simplicity, only thetwo-dimensional single-hull tank (SHT) subjected to pre-specifiedperiodic motions with different frequencies and amplitudes isconsidered. The results suggest that the tank motion does not onlycause a periodic oscillation of the oil/water flow through the brokenhole, but also results in a second long-duration stage of spilling after aquasi-hydrostatic-equilibrium condition occurs, leading to moresignificant amount of spilled oil.