Numerical Investigation on Influence of Sea-current Velocity Profiles on the Propagation Characteristics of Hazardous Noxious Substances Spilled from the Ship

Abstract

The purpose of this study is to numerically analyze the influence of sea-current velocity on near-field propagation of hazardous noxious substances (HNS) spilled from the ship. The commercial code ANSYS FLUENT (V. 17.2) was used to analyze the behavior of the spilled HNS and three-dimensional computational analysis was performed for various conditions of the current velocity. This study investigated the effect of sea-current velocity profile including surface current velocity as well as deep current velocity considering different surface layer depths. In particular, based on the CFD results we suggested the engineering model for predicting the HNS propagation. With 104 scenarios, a number of simulations were carried out, and three important parameters were newly introduced quantitatively. We used the well-known Kriging model for making engineering model which was evaluated from the hidden point analysis. It is expected that the engineering modelwould provide useful information on practically managing the risk from HNS spill without CFD simulations.