期刊
JOURNAL OF CHEMICAL PHYSICS
卷 154, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0037967
关键词
-
资金
- Office of Science of the U.S. Department of Energy [DE-SC0004993]
- Laboratory Directed Research and Development Program of the Department of Energy's Lawrence Berkeley National Laboratory under the U. S. Department of Energy Office of Science, Office of Basic Energy Sciences [DE-AC02-05CH11231]
- EPSRC (UK) [EP/N025245/1]
- EPSRC [EP/N025245/1] Funding Source: UKRI
In this study, a simple three-step kinetic model for water evaporation was proposed and validated using established thermodynamic models and experimental data. The model describes the evaporation process as a combination of two limiting processes occurring in the liquid-vapor interfacial region.
The process of water evaporation, although deeply studied, does not enjoy a kinetic description that captures known physics and can be integrated with other detailed processes such as drying of catalytic membranes embedded in vapor-fed devices and chemical reactions in aerosol whose volumes are changing dynamically. In this work, we present a simple, three-step kinetic model for water evaporation that is based on theory and validated by using well-established thermodynamic models of droplet size as a function of time, temperature, and relative humidity as well as data from time-resolved measurements of evaporating droplet size. The kinetic mechanism for evaporation is a combination of two limiting processes occurring in the highly dynamic liquid-vapor interfacial region: direct first order desorption of a single water molecule and desorption resulting from a local fluctuation, described using third order kinetics. The model reproduces data over a range of relative humidities and temperatures only if the interface that separates bulk water from gas phase water has a finite width, consistent with previous experimental and theoretical studies. The influence of droplet cooling during rapid evaporation on the kinetics is discussed; discrepancies between the various models point to the need for additional experimental data to identify their origin.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据