气体分子系统动态过程的微机辅助研究

用数组模拟气体分子系统,用数组元素取值的变化模拟系统状态的变化是一种可行的微机辅助研究系统动态过程的方法,本文给出了利用这种方法得出的若干结果。

Boltzmann方程用于气体分子系统与用于非平衡等离子体之间的差异

尽管严格地说传统的Boltzmann方程应用范围仅是中性气体分子系统,但将其应用于常见的非平衡等离子体包括大气压条件下流动的非平衡等离子体时,对其结果做一定修正后仍然正确。为解释其原因,对Boltzmann方程的建立过程进行了分析。结果表明:要将Boltzmann方程的应用范围从中性气体分子体系扩展到各种条件下的非平衡等离子体,同时又不必在最后结果上做人为的修正,则Boltzmann方程右边碰撞项的后面要加上产生项和损失项。添加了产生项和损失项的Boltzmann方程是一个既适用于气体分子系统也适用于各种非平衡等离子体的普适基本方程。

Thermodynamic Equilibrium for Mixtures of Combustible Gases and Air

Standard treatments of thermodynamic equilibrium are incomplete. They do not take account of all factors determining equilibrium, cannot explain why many systems do not reach equilibrium and do not discuss the questions of reaching and maintaining equilibrium. The arguments presented here provide a single physical definition of thermodynamic equilibrium that accounts for all factors determining thermodynamic equilibrium for mixtures of combustible gases and air. Based on the standard delrmition of thermodynamic equilibrium, the MBD （Maxwell Boltzmann distribution） and a simple molecular model lead to three possible types of equilibrium. The regions of temperature pressure and composition for each type of equilibrium are defined by the measured values of ignition temperatures and the explosive and flammability limits. How this definition of thermodynamic equilibrium can be extended to all molecular systems is discussed in the following papers.