Study On Spilled Oil's Fate And Morphology On The Sea

With the rapid development of maritime shipping industry, marine oil spill accidents have occurred frequently, In order to reduce the impact of oil spill accidents on the water environment and human existence, studying on the fate and morphology of oil appears to be particularly important. The main contents of the paper include:Based on a lot of information, the oil spill fate model is established in the paper. The weathering model takes into account four main processes:Evaporation, Emulsification, Dissolution and Sedimentation. Oil morphology model is based on the computations on the oil dynamics equation on the surface. Combining with the tide and wind field conditions into the model, the purpose of modeling the oil film morphology on the surface can be achieved in the paper.Based on the idea of the operators splitting method, the higher-order splitting scheme, Crank-Nicolson FEM has been applied to the two-dimensional oil dynamics equation on the surface. The scheme makes the equation split into four absolute one-dimensional equations, and then computes on the equations.The model is applied to the numerical simulation of Huludao waters. Compared with the "oil particles" idea result, it is more obvious when used to simulate different volume of spilled oil. The simulation result is more agree with reality when simulating the oil film area, which proves the rationality of this model, In the paper, two factors, the nature of oil and wind conditions, are considered and simulated in the model.Spilled oil morphology model has been applied to the numerical simulation of Huludao area, the result is reasonable, when the oil spill accident happened, the model can provide the oil film thickness, oil film area and other basic information to the decision making team.