Abstract
Investigation on oil-mineral aggregate (OMA) formation in ice-covered waters was conducted by the Canadian Coast Guard (CCG). Different tests were performed in large basins using Heidrun oil and calcite to determine the efficiency of the OMA formation in these conditions. The main objectives of the experiments were (1) to validate oil droplets (OD) and OMA formation in ice-covered waters for different turbulence levels, (2) to investigate the type and size of OMAs formed, and (3) to help identify performance indicators of the OMA process in these conditions. The results have shown that OD and OMA formation is initiated when the stirring action upsets the water surface in the basin. The majority of the OMAs formed were droplet OMAs and their sizes related to the energy level and to the ice type. The sur-face flow pattern with and without ice was characterised using a particle image velocimetry (PIV) method. The results have shown the circu-lation pattern of surface currents is modified due to the ice blocks. The energy damping and a significant reduction in current intensity were the most evident effects consequential to the presence of ice.
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Cloutier, D., Doyon, B. (2008). Oma Formation in Ice-Covered Brackish Waters: Large-Scale Experiments. In: Davidson, W.F., Lee, K., Cogswell, A. (eds) Oil Spill Response: A Global Perspective. NATO Science for Peace and Security Series C: Environmental Security. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8565-9_11
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DOI: https://doi.org/10.1007/978-1-4020-8565-9_11
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