Modeling And Simulation Of Oil Spill In Inland Ship

Along with the industry development, the need of petroleum and petroleum products rises rapidly. Meanwhile, the oil spills in the process of oil extraction and transportation become one of the main problems which are threatening our living environment. In order to provide an effective support for the emergency treatment of oil spilling accidents, experts are studying the diffusion, dissolution and transformation of spilled oil in water, and building systems of simulating and predicting oil spilling. Most of the current existing models of simulating oil spilling are built based on ocean or estuary occasions, but the oil spill simulations for inland rivers are even more important and complex since inland rivers are usually quite narrow with complex situations, and they are providing domestic water for the neighboring cities which makes it more urgent to build systems focusing on inland cases.This paper builds an effective model for oil spill in inland river based on existing research work, using improved ways to solve the numerical model and developing an efficient system to provide prediction and decision support for emergency treatment. Specific works includes:1) Using the principle of MIKE21HD model and two-dimensional Saint-Venant equations to establish hydrodynamic model which works based on the real-time measurement of the flow rate to calculate the entire river flow field and provides accurate basic data for simulating oil movements;2) Analyzing the power source of oil movements (mainly water and wind), and simulating the moving of the spilled oil considering the turbulent diffusion;3) Analyzing the changes of oil in the process of movement like part of the oil being absorbed by the river bank and water plants, dissolving in water, and evaporating into air, to simulate the situation and environmental pollution more accurately;4) To achieve the goal of prediction and supporting rapid decision, Using one-dimensional model to approach the initial state of the velocity field base on classical algorithm of solving two-dimensional hydrodynamic model;5) Proposing a new computing model with dynamic window which greatly reduces the amount of unnecessary calculations, further improving the prediction speed with almost no decrease in accuracy.