This work presents a study on the evaporation of a volatile liquid droplet placed on a substrate and surrounded by air. We consider in this work the case of a pure liquid droplet (water, ethanol and butanol), and the case of a binary mixture droplet (water-ethanol and water-butanol). The aim of this work is to study the effect of the volatility of each component within a pure or binary droplet on the evaporation kinetics. The volatility of a liquid is considered as the ability of a substance to evaporate. One liquid is more volatile than another is the one with the lowest boiling temperature. We noticed that for pure liquid droplets, the volatility of the liquid considerably influences its life and cooling effect. After evaporation, the more volatile the liquid, the shorter the life of the droplet and the greater its cooling. The results of the simulation were compared and validated by the literature. Experimental results are used for validation and interpretation of the evaporation of water-butanol binary droplet. The behavior of the butanol in the mixture is different to that when it is pure. Despite its low volatility compared to water, strongly diluted in a water-based droplet, butanol evaporates in a preferential way. In fact, in the diluted mixture, the fraction of butanol evaporates first and is exhausted before that of water. The binary droplet tends to become a pure water droplet. We also show that, the same as in the case of the water-ethanol, the addition of butanol in water accelerates evaporation and decreases the droplet’s life.

这项工作提出了对放置在基材上并被空气包围的挥发性液滴蒸发的研究。我们在这项工作中考虑的是纯液滴（水，乙醇和丁醇）的情况，以及二元混合液滴（水-乙醇和水-丁醇）的情况。这项工作的目的是研究纯的或二元液滴内每个组分的挥发性对蒸发动力学的影响。液体的挥发性被认为是物质蒸发的能力。一种液体比另一种沸点最低的液体更易挥发。我们注意到，对于纯液滴，液体的挥发性会极大地影响其寿命和冷却效果。蒸发后，液体越易挥发，液滴的寿命越短，冷却效果越好。仿真结果经过文献比较和验证。实验结果用于验证和解释水-丁醇二元液滴的蒸发。丁醇在混合物中的行为与纯净时的行为不同。尽管与水相比挥发性较低，但在水基液滴中强烈稀释，但丁醇会优先蒸发。实际上，在稀释的混合物中，丁醇的一部分首先蒸发，然后先于水排出。二元液滴倾向于变成纯净的水滴。我们还表明，与水-乙醇的情况相同，在水中添加丁醇会加速蒸发并降低液滴的寿命。实验结果用于验证和解释水-丁醇二元液滴的蒸发。丁醇在混合物中的行为与纯净时的行为不同。尽管与水相比挥发性较低，但在水基液滴中强烈稀释，但丁醇会优先蒸发。实际上，在稀释的混合物中，丁醇的一部分首先蒸发，然后先于水排出。二元液滴倾向于变成纯净的水滴。我们还表明，与水-乙醇的情况相同，在水中添加丁醇会加速蒸发并降低液滴的寿命。实验结果用于验证和解释水-丁醇二元液滴的蒸发。丁醇在混合物中的行为与纯净时的行为不同。尽管与水相比挥发性较低，但在水基液滴中强烈稀释，但丁醇会优先蒸发。实际上，在稀释的混合物中，丁醇的一部分首先蒸发，然后先于水排出。二元液滴倾向于变成纯净的水滴。我们还表明，与水-乙醇的情况相同，在水中添加丁醇会加速蒸发并降低液滴的寿命。在丁醇中强烈稀释后，丁醇会优先蒸发。实际上，在稀释的混合物中，丁醇的一部分首先蒸发，然后先于水排出。二元液滴倾向于变成纯净的水滴。我们还表明，与水-乙醇的情况相同，在水中添加丁醇会加速蒸发并降低液滴的寿命。在丁醇中强烈稀释后，丁醇会优先蒸发。实际上，在稀释的混合物中，丁醇的一部分首先蒸发，然后先于水排出。二元液滴倾向于变成纯净的水滴。我们还表明，与水-乙醇的情况相同，在水中添加丁醇会加速蒸发并降低液滴的寿命。