一种开放系统非平衡态气体的状态方程

Non-equilibrium Equation of Gas State in Open System

现有的气体状态方程都是以一定的气体为研究对象,研究的是封闭系统,只能表达宏观整体气体的状态。本文以气体稳态导热模型为研究对象,在边界上的温度给定并且恒定的条件下提出了系统每一微小体积处的状态方程为PV=Nk(2T2-273.15T)～1/2的结论。由于从微观角度来看每一微小体积都处在一个恒温而开放的系统之中,因此此方程是一种非平衡态(各个部分温度不相等)开放系统的气体状态方程。本文通过使用cfd软件(计算流体力学Computational fluid Dynamics软件)模拟分析和应用此公式计算气体热导率的两种方式的验证,充分证明了此公式的正确性,并给出了使此公式达到较高精确度的适用范围。本文目的在于提出一个精确度较高的开放系统非平衡态气体的状态方程,期望能揭开开放系统非平衡态气体状态的一般规律。

Nowadays the state equation of the gas are based on a certain gas,the system is a closed one,and can only express the overall macroscopic state of the gas.This article takes the steadystate system of the heat conduction on as the object of the research,and gives a state equation of the gas of each tiny volume at the status of a common boundary conditions——PV=Nk(2T2-273.15T)～1/2.Because each of the small volume of the gas's system is at a constant temperature from the microscopic point of view,this equation is a description of the microscopic state of gas,and the object of study is relatively open.This formula is what I found when trying to derive a more accurate gas thermal conductivity formula.The simulation analysis of the cfd software verifies the precision of this formula is high and the formula can be applied.