中文摘要：

为了探索水的重新通风法律，溢出溢洪道，在在溢洪道上的水流动的氧的转移过程被学习。界面的传质系数被实验获得。流动地和骚乱特征被数字方法模仿。二分阶段执行的空气水的液体(VOF ) 模型的部分卷流动被介绍追踪接口。因而，在免费表面与速度和动能联系的界面的传质系数的量的表示被导出，为在溢洪道上的水流动的重新通风模型被建立。有不同条件的试验性的数据的 Theexamination 在溢洪道上为水流动显示出 re-aerationmodel 的有效性。这研究将是重要的评估溶解的氧集中和河的自清能力。

英文摘要：

In order to explore the re-aeration law of water flow over spillway, the transfer process of oxygen in water flow over spillway was studied. The interfacial mass transfer coefficients were obtained by experiments. The flow fields and the turbulence characteristics are simulated by numerical methods. The fractional Volume Of Fluid （VOF） model of the air-water two phase flows was introduced to track the interface. Consequently, the quantitative expression of the interfacial mass transfer coefficients related with velocity and kinetic energy at the free surface was derived and the re-aeration model for the water flow over spillway was established. The examination with the experimental data of different conditions shows the validity of the re-aeration model for the water flow over spillways. This study will be important to evaluate the dissolved oxygen concentration and self-purification ability of rivers.