Abstract:   he currently used methods for determining the thermodynamic equilibrium of the two phase mixed substances is to judge the equality of the coefficient of each component in two phases, and by this analysis each component mole fraction can be got at the equilibrium state. Introduced diffusion equation to describe various gas and liquid components from exposure to the stabilization process, established a mathematical model to describe the two-phase non-equilibrium diffusion process, meantime introduced a new algorithm to solve the mathematical model. Using this methods a real gas-liquid two-phase system was analyzed. The results compared with the experimental data proved the feasibility of the method, thus the non-equilibrium phase transition analysis of the issue provided a new analysis method.

Key words: Non-equilibrium process , Algorithm , Duality gas&liquid , Separation of variables

摘要： 目前国内外多采用平衡后各组分逸度系数相等的平衡判据来描述两相中各个组分的分配情况, 但该
法无法进行两相由非平衡初始状态达到平衡状态这一非平衡热力学过程的研究。针对这个问题, 引入扩散方程描
述气相和液相各个组分由接触到稳定的过程, 实现了描述两相非平衡态扩散过程的数学模型, 提出了分阶段求解的
模型求解新算法, 并对一个二元气液两相系统进行了实例分析。计算结果与实验数据对比验证了该算法的可行性,
从而为非平衡态相变问题的分析提供了新的方法。

关键词: 非平衡过程 , 算法 , 二元气液 , 分离变量法