论文标题
高湿度可增强非水挥发性喷雾剂的蒸发
High humidity enhances the evaporation of non-aqueous volatile sprays
论文作者
论文摘要
我们通过湍流喷雾剂实验研究了非常挥发性的液滴（Novec 7000工程流体）的蒸发。用喷嘴产生了几微米的直径的液滴，然后注入专门建造的封闭的十二面体腔室，在该室内仔细控制了腔室的环境温度和相对湿度。我们在快速蒸发的液滴上观察到水冷凝，包括喷雾剂和单个声学上的毫无疑问的毫米毫米Novec 7000液滴。我们进一步研究了湿度的效果，并发现更潮湿的环境会导致挥发性液体的蒸发速度以及更多的水冷凝。这是由更大的潜在水热来解释的。我们根据Fick定律扩展了一个分析模型，以定量说明数据。
We experimentally investigate the evaporation of very volatile liquid droplets (Novec 7000 Engineered Fluid) in a turbulent spray. Droplets with diameters of the order of a few micrometers are produced by a spray nozzle and then injected into a purpose-built enclosed dodecahedral chamber, where the ambient temperature and relative humidity in the chamber are carefully controlled. We observe water condensation on the rapidly evaporating droplet, both for the spray and for a single acoustically levitated millimetric Novec 7000 droplet. We further examine the effect of humidity, and reveal that a more humid environment leads to faster evaporation of the volatile liquid, as well as more water condensation. This is explained by the much larger latent heat of water. We extend an analytical model based on Fick's law to quantitatively account for the data.
