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三相线钉扎的大液滴蒸发实验
Authors
刘秋生
朱志强
+3 more
秦军
赵栋栋
陶跃群
Publication date
15 March 2022
Publisher
Abstract
利用实践十号返回式科学实验卫星蒸发对流箱,开展了三相线处于钉扎状态且接触半径大于毛细长度的无水乙醇大滴在加热PTFE表面蒸发的地基科学实验。实验发现,液滴体积随时间线性递减,但钉扎大液滴蒸发过程中没有出现恒定接触角(CCA)阶段。与小液滴蒸发的恒定接触半径(CCR)阶段相同,大液滴的平均蒸发速率也与初始体积无关,表明受重力影响明显的大液滴蒸发主要发生在三相线附近区域。瞬时蒸发速率经历了迅速上升和之后的长时间内保持稳定两个阶段。与数值模拟结果对比分析发现,准静态扩散模型低估了三相线处于钉扎状态的大液滴瞬时蒸发速率,而同时考虑蒸气扩散与空气中自然对流经验模型的准确性取决于实验所用工质
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 09/10/2022