This work focuses on investigating the dynamics of different types of oil droplets rising freely in water columns. Fifteen different types of oils were selected to cover most of the conventional oils. The particle size range of the study is 1.41∼13.58 mm, which can cover the largest oil droplet size that may occur in the real environment. Investigation results show that oil droplet characteristics greatly influence the dynamics process of oil droplet motion. The characteristics which play a dominant role will change as the oil droplet particle size increases. Meanwhile, a set of computational models applicable to the terminal velocity and drag coefficient of oil droplets in the range of 20 < Re < 1200 in a non-pure system are obtained by organizing the experimental data and comparing with the traditional correlation equation, respectively. The models involve dimensionless parameters such as Eo, Mo, and We numbers with fitting coefficients up to 0.984.

中文翻译：

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自然水域溢油油滴自由上升特性实验研究

这项工作的重点是研究不同类型油滴在水柱中自由上升的动力学。选择了十五种不同类型的油来涵盖大部分常规油。研究的粒径范围为1.41∼13.58 mm，可以覆盖真实环境中可能出现的最大油滴尺寸。研究结果表明，油滴特性极大地影响了油滴运动的动力学过程。随着油滴粒径的增大，起主导作用的特性将发生变化。同时，通过整理实验数据并分别与传统相关方程进行比较，得到了一套适用于非纯体系中油滴在20 < Re < 1200范围内的终端速度和阻力系数的计算模型。该模型涉及无量纲参数，例如 Eo、Mo 和 We 数，拟合系数高达 0.984。