Fluent를 利用한 오일 붐 漏油 모델링

Abstract

Marine oil pollution attracts scientist's attention because it can cause much damage to the marine environment in short period of time. If oil comes in marine environment, it is most important to tackle and recover the oil as soon as possible. The oil boom is used to tackle the spilled oil at sea and many kinds of oil boom are now developed and used.

The effectiveness of oil boom depends on how well it contains oil and many factors such as water velocity, viscosity and density of oil, water depth, oil volume, and the length of boom draft are known as the cause of oil boom failure.

In this study, computer modelling was peformed to investigate how those factors influence the oil containment process. The Fluent, most popular one of many CFD(computational fluid dynamics) programs was chosen for modelling tool. The modelling results were verified using the empirical data. The result of this study are as follows.

As water velocity increases, the length of oil slick decreases while the thickness of oil slick increases. Also, strong water velocity causes the instability on interface between oil and water. As oil viscosity increases, the instability on the interface between oil and water grows, but it doesn't cause the big difference in critical velocity for oil escape. As oil density increases, the thickness of oil slick increases due to the effect of gravity force, so that the big difference in critical velocity is resulted. In water depth below minimum depth, the shape of oil slick is changed as water depth changes. In water depth above minimum depth, the shape of oil slick is almost uniform. As oil volume increases, the length of oil slick increases while the thickness of oil slick increases slightly. In the length of boom draft below minimum length, drainage failure is occurred. Minimum length is determined by volume of oil. As length of boom draft increases, critical velocity increases and shape of oil slick is changed slightly.