Application of marine oil spill model based on Monte Carlo method in Laoshan Bay

Abstract

The Monte Carlo method is used to simulate the random motion of oil particles, and it is more and more widely used in the oil spill model. The marine oil spill model established in this paper focuses on the two most important processes in the oil spill process: one process is to simulate the diffusion process of oil spill, whose main method is the Monte Carlo method; the other is to simulate the oil film drifting on the sea, which mainly considers the marine hydrological conditions during the oil spill, especially the transport of the wind field and the surface flow field to the oil film. After using this model to simulate an oil spill accident, in order to verify the accuracy, the mature simulation software Mike21 OS module is used to simulate the oil spill under the same conditions, and finally the two results will be compared and analyzed. In this paper, the improvement and innovation of the model design and calculation method are made. When considering the influence of the flow field on the oil film motion, the flow field at the corresponding moment of the oil particle is accurately calculated by the differential method, and the accuracy of the simulation is improved. The Euler-Lagrangian particle tracking method is used to determine the drift process of the oil film. The Monte Carlo method is used to simulate the diffusion process of the oil film and to establish the marine oil spill model. In the calculation, mainly by dividing the simulation process into a certain number of time periods, the motion of the oil particles under the influence of wind speed and flow velocity and the free diffusion motion are superimposed in each time period to obtain the motion distance of this time period.