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Evaporation of water/ethanol droplets in an air flow: Experimental study and modelling

机译:空气流动中的水/乙醇液滴的蒸发:实验研究和建模

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The paper focuses on experimental investigation and modelling of the evaporation of supported ethanol/water droplets in an air flow. The modelling is based on the effective thermal conductivity/effective diffusivity model, using the analytical solutions to the transient heat transfer and species diffusion equations in droplets at each time step. The contribution of the supporting thread is included in the model. Model predictions are shown to be compatible with experimental data. For all mass fractions of ethanol, droplet surface temperatures rapidly decrease initially. This is followed by an increase in this temperature for non-zero mass fractions of ethanol in the mixture. For pure water this temperature remains almost constant after an initial decrease. In all cases, droplet diameters to power 1.5 decrease almost linearly with time. This agrees with model predictions in the limit for large droplet Reynolds numbers.
机译:本文侧重于试验研究和空气流动中负载乙醇/水滴的蒸发的建模。 该建模基于有效的导热性/有效扩散型模型,在每次步骤中使用分析解和液滴中的液滴中的物种扩散方程。 支持线程的贡献包含在模型中。 模型预测显示与实验数据兼容。 对于乙醇的所有质量分数,液滴表面温度最初迅速下降。 随后是混合物中乙醇的非零质量分数的该温度的增加。 对于纯净水,在初始下降后,这种温度几乎恒定。 在所有情况下,随着时间的推移,液滴直径为1.5几乎线性地减少。 这与大型液滴雷诺数的极限相同意模型预测。

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