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Estimation of Saturated Vapor Pressure from Nucleation Data
Mei-li Wang1, Ji-ming Yang*1, Xi-sheng Luo2
1.Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027,China;2.Shock Wave Laboratory, RWTH Aachen University, Aachen 52056, Germany
Abstract:
Saturated vapor pressure was calculated from the nucleation experimental data using the thermodynamically consistent nucleation theory in which the effect of real gas is considered. The cubic polynomial fit equations of saturation pressure for several substances were obtained based on the calculation. The results of the calculations were compared to those of thermodynamic equilibrium equation and the empirical equation and applied to the predictions of the classical nucleation theory. The results show that the saturation pressures estimated from the nucleation data agree fairly well with those of empirical equations for the substances investigated, and this indicates that the predictions from the classical nucleation theory are close to the experimental data.
Key words:  Nucleation data, Saturated vapor, Surface tension
FundProject:
由成核率数据拟合饱和蒸汽压力
王美利  1, 杨基明*    1, 罗喜胜2
1.中国科学技术大学力学与机械工程系激波实验室,合肥,230027;2.亚琛工业大学激波实验室,德国
摘要:
从成核率的实验数据出发,对饱和蒸汽压力进行计算拟合并应用于经典成核理论.在计算过程中,采用了最新发展的成核率模型,其中考虑了真实气体效应和核子曲率对表面张力的影响.作为比较,还从热力学平衡条件和经验方程估算了几种物质的饱和蒸汽压力.结果表明,从成核率实验数据计算拟合的饱和蒸汽压力曲线与经验方程曲线有微小的差别;在经典成核理论的应用中,基于该拟合的饱和压力方程计算的成核率更接近于实验结果.
关键词:  成核率  饱和蒸汽压  表面张力
DOI:10.1360/cjcp2006.19(5).416.7
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