The behavior of droplets collision in a flash evaporation ambient widely exists in various fields. In this work, the deformation analysis and thermal analysis models were established under the condition of flash via a computational fluid dynamics (CFD) method. First, the effects of initial temperature and collision velocity on heat and mass transfer during evaporation were considered. Then, the morphology change of the liquid phase, the mass change, and their influencing factors during the droplet evaporation process were analyzed. A very good agreement is observed between the results of this paper and the published literature. The results show that the interaction between the initial collision velocity and the initial temperature affects the heat and mass transfer performance. The initial collision velocity influences the heat and mass transfer process of the evaporating droplet by affecting the deformation characteristics of the droplet. The collision velocity and the liquid temperature have a competitive relationship with the evaporation process. Under a low-initial temperature, the collision velocity played a leading role in the evaporation of the liquid phase and the mass transfer of steam.

中文翻译：

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闪蒸模式下液滴碰撞的传质传热模拟

液滴在闪蒸环境中的碰撞行为广泛存在于各个领域。在这项工作中，通过计算流体动力学（CFD）方法建立了闪蒸条件下的变形分析和热分析模型。首先，考虑了初始温度和碰撞速度对蒸发过程中传热传质的影响。然后,分析了液滴蒸发过程中液相的形貌变化、质量变化及其影响因素。在本文的结果和已发表的文献之间观察到非常好的一致性。结果表明，初始碰撞速度与初始温度之间的相互作用影响传热传质性能。初始碰撞速度通过影响液滴的变形特性影响蒸发液滴的传热传质过程。碰撞速度和液体温度与蒸发过程具有竞争关系。在较低的初始温度下，碰撞速度对液相的蒸发和蒸汽的传质起主导作用。