界面层内压力分布的力学分析

Mechanical Analysis of Pressure Distribution in Gas-fluid Interface

用力学方法分析了界面特性与热力学的关系,导出了界面层内压力分布的一般表达式,并与Gibbs方法进行比较,当简化到不考虑界面层厚度时,在界面处压力发生突变,所得结果与界面热力学中的Young-Laplace方程一致.

Mechanical analysis method is used in this paper to analyze the thermodynamic properties in gas-fluid interface. Pressure distribution in gas-fluid interface was derived. Comparing with the Gibbs＇s method, it shows that the pressure changes sharply in the interface when its thickness limits to zero, the deduction is accord with the Young-Laplace＇s equation.