Author(s)

Jorma Rytkonen, Seppo Liukkonen & Timo Riipi

Abstract

A laboratory study on oil spreading and drifting under ice was conducted by VTT Manufacturing Technology, Finland. The aim of the study was to find out threshold conditions for the oil movement under ice. ITie oil was released under ice in calm water and the spreading of the oil slick under the bottom of the ice was investigated. In the oil drifting part, oil drifting velocities under level ice in steady water flow, water flow velocities making oil to submerge from open water to under ice and water velocities making oil to escape from under ice ridges were studied. This paper describes the oil spreading part of the study. The study included four types of oil, namely the fresh and pre-altered North Sea Brent crude oil, lubrication oil and diesel fuel oil. All the measurements were

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