Evaporation Length Scales of Confined Water and Some Common Organic Liquids
Evaporation Length Scales of Confined Water and Some Common Organic Liquids
复制标题
DOI：
10.1021/jz200319g
复制
发表时间：
2011-05-05
影响因子：
5.7
通讯作者：
Giovambattista, Nicolas
中科院分区：
文献类型：
--
作者：
Cerdeirina, Claudio A.;Debenedetti, Pablo G.;Giovambattista, Nicolas
当两个宏观的和排斥的表面浸入水中时，受限液体的蒸发在低于临界分离（蒸发长度尺度）的情况下是有利的。我们使用热物理性质数据来评估水的蒸发长度尺度，并将其与大气压下广泛温度范围内的几种常见有机液体进行比较。我们表明，水的蒸发长度尺度是1 μ m的顺序，明显大于一般认为的。几种常见的有机液体的蒸发长度尺度，虽然系统地小于水的蒸发长度尺度，但同样是宏观的，证明了该现象的普遍性。导致水的蒸发长度比其他液体大的唯一物理性质是它的表面张力。在小浸没面的限制下，蒸发长度与浸没物体的尺寸成正比，而不依赖于受限液体。
When two macroscopic and repulsive surfaces are immersed in water, evaporation of the confined liquid is favored thermodynamically below a critical separation: the evaporation length scale. We use thermophysical property data to evaluate the evaporation length scale of water, and compare it to that of several common organic liquids over a broad range of temperatures, at atmospheric pressure. We show that water's evaporation length scale is of the order of 1 mu m, appreciably larger than generally thought. The evaporation length scale of several common organic liquids, although systematically smaller than water's, is likewise macroscopic, attesting to the generality of the phenomenon. The only physical property that causes water's evaporation length scale to be larger than that of other liquids is its surface tension. In the limit of small immersed surfaces, the evaporation length is proportional to the size of the immersed object, and does not depend on the confined liquid.