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该文基于三维自由水面垂向分层动网格的Euler-Lagrangian模式,采用VC方式(Vertex-Centered)的非结构化有限体积方法离散三维浅水方程,模拟渤海的潮汐水流运动过程。以此为水动力背景场,采用油、水分离的Lagrangian粒子追踪模型,对渤海海域发生的溢油漂移扩散问题进行模拟。其油品的蒸发、乳化和溶解等风化作用以引入综合衰减系数的方式考虑。模型对油膜的漂移路径、厚度和面积进行了实时模拟和预测,用多个测站的同步连续实测值对水动力模式进行了参数率定与模型验证,油膜输运扩散的计算结果也与相关报告数据进行了对比,均吻合良好,说明模型具有较高的可靠性与重现性。
Based on the Euler-Lagrangian model of vertical three-dimensional free-moving meshes, a three-dimensional shallow water equation is discretized using the unstructured finite volume method of the VC method (Vertex-Centered) to simulate the tidal current motion in the Bohai Sea. Using this model as a hydrodynamic background field, a Lagrangian particle tracking model of oil and water separation was used to simulate the problem of oil spill drift and diffusion in the Bohai Sea. Its oil evaporation, emulsification and dissolution weathering in order to introduce a comprehensive attenuation coefficient of the way to consider. The model simulates and predicts the drift path, thickness and area of the oil film in real time. The parameterization and model verification of the hydrodynamic model are carried out with simultaneous and continuous measured values from multiple stations. The calculated results of the oil film transport and diffusion are also correlated The reported data are in good agreement with each other, indicating that the model has high reliability and reproducibility.