The widely used droplet–droplet collision outcome model distinguishing stretching separation (SS) and fast coalescence (FC) (named SS/FC model) proposed by Jiang et al. [J. Fluid Mech. 234, 171 (1992)] is corrected and improved in this study. By re-deriving the momentum conservation, the correct mathematical expression of the tangential velocity along the sliding direction is obtained. Moreover, to reduce the uncertainties of model applications, the model is improved by expressing the constants as a function of the Ohnesorge number and droplet size ratio. The validation results demonstrate the effectiveness of the improved SS/FC model.

中文翻译：

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广泛使用的液滴－液滴碰撞结果模型的校正和改进

江等人提出的广泛使用的液滴－液滴碰撞结果模型可以区分拉伸分离（SS）和快速聚结（FC）（称为SS / FC模型）。[J. 流体机械。234，171（1992）]在本研究中得到纠正和改进。通过重新推导动量守恒，可以得到沿滑动方向的切线速度的正确数学表达式。此外，为了减少模型应用的不确定性，通过将常数表示为Ohnesorge数和液滴尺寸比的函数来改进模型。验证结果证明了改进的SS / FC模型的有效性。