Investigation on numerical modelling of spill oil movementin sea ice infested waters

A numerical model of spill oil movement for those waters with sea ice is presented in the paper.In description of the sea ice movement in the model,different constitution laws of the sea ice are employed to estimate sea ice forces according to its compactness:a visco-plastic model, which is based on the continuous medium theory, is accepted for the nearshore areas with high compactness of sea ice;and a collision model is used for those marginal areas with low compactness of sea ice, which is based on the discret medium theory.In the prediction models of spill oil drifting/spreading movements the following situations of sea ice are considered:sea ice with low, middle and high compactness,respectively, in addition to that in an integral ice cover.The results of simulation calculations by using the model indicated its correctness and applicability in prediction of the potential influence in a cold region offshore oil spill accident.