As submerged oil leakage from damaged tanker is unable to be avoided, a large number of scholars have carried out a series of studies on the mechanism of submerged oil leakage from damaged tank of doublehull tankers based on simplified in-viscid model. With the further research on prediction model of oil leakage and leakage features, viscosity of crude oil has become an essential factor that can't be ignored in improving prediction accuracy. At present, hydro-static and hydrodynamic theory have been applied to the researches on submerged oil leakage from damaged tanker, but the effects of viscosity and turbulence are ignored. Nevertheless, a change in viscosity of oil or the inner structure of double bottom or sloshing leads to significant changes in the behavior of oil leakage, which confirms the presence of viscous effects.
This paper presents a study on viscous effects for submerged oil leakage from damaged tank of double-hull tankers. Based on multiphase flow theory and viscous hydrodynamic theory, the mechanism of viscous effects on submerged oil leakage in different leakage stages is explored by the experimental investigation. The presented results are beneficial for a better understanding of viscous effects for submerged oil leakage from damaged tank of double-hull tankers and an emergency control of crude oil leakage from tankers.
