技术说明:封闭体积内蒸发液滴的寿命

IF 3.9 3区 环境科学与生态学 Q2 ENGINEERING, CHEMICAL
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引用次数: 0

摘要

对封闭体积内液滴的传热和传质进行了数值模拟,封闭体积内的气体相对于液滴加热。确定了在气体和液滴温度以及液滴质量分数的初始值变化时液滴的寿命。结果发现,液滴寿命与液滴的初始温度关系不大,而与气体的初始温度有明显的关系。此外,研究还证明,封闭空间中的液滴寿命比无限空间中的液滴寿命长。这是由于液滴对周围气体的冷却导致液滴蒸发率降低。我们提出了一个参数,可以考虑蒸发液滴对气滴混合物热状态的影响,并能对数值模拟结果进行归纳,以获得封闭体积中液滴寿命的表达式。对使用所获得表达式的误差进行了估算。结果表明,计算结果的误差率小于百分之十。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Technical Note: Lifetime of evaporating droplets in a closed volume
The numerical modeling of heat and mass transfer of droplets within a closed volume containing gas heated in relation to the droplets was conducted. The droplet lifetime at variation of initial values of gas and droplet temperatures and droplet mass fraction has been determined. It was found that droplet lifetime exhibits a weak dependence on the initial droplet temperature and a pronounced dependence on the initial gas temperature. Moreover, it was demonstrated that the droplet lifetime in a closed volume is longer than in infinite space. This is due to the fact that the cooling of the surrounding gas by droplets results in a decrease in the evaporation rate of the droplets. A parameter is proposed which allows for the consideration of the effect of evaporating droplets on the thermal regime of the gas-drop mixture, and which enables the generalization of the results of numerical simulation to obtain an expression for the droplet lifetime in a closed volume. The error in the use of the obtained expression is estimated. It was determined that the margin of error for the calculation results is less than ten percent.
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来源期刊
Journal of Aerosol Science
Journal of Aerosol Science 环境科学-工程:化工
CiteScore
8.80
自引率
8.90%
发文量
127
审稿时长
35 days
期刊介绍: Founded in 1970, the Journal of Aerosol Science considers itself the prime vehicle for the publication of original work as well as reviews related to fundamental and applied aerosol research, as well as aerosol instrumentation. Its content is directed at scientists working in engineering disciplines, as well as physics, chemistry, and environmental sciences. The editors welcome submissions of papers describing recent experimental, numerical, and theoretical research related to the following topics: 1. Fundamental Aerosol Science. 2. Applied Aerosol Science. 3. Instrumentation & Measurement Methods.
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