On the Correct Form of the Saha Equation for Two-Temperature Plasmas  

作　　者：HAN Peng CHEN Xi LI He-ping 韩鹏;陈熙;李和平(Department of Engineering Mechanics,Tsinghua University,Beijing 100084)

机构地区：[1]Department of Engineering Mechanics,Tsinghua University,Beijing 100084

出　　处：《Chinese Physics Letters》1999年第3期193-195,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.59676011 and 59836220.

摘　　要：Two quite different Saha equations modified to a two-temperature plasma were proposed and employed in many literatures.In order to clear up this confusion phenomenon lasted for a few decades in the community of thermal plasma science and technology,this paper re-examines the thermodynamic derivation of the two-temperature Saha equations.It is pointed out that the modified Saha equation deduced by using the minimum Gibbs or Helmholtz free energy is incorrect for the two-temperature plasma.Instead,a more rigorous derivation is presented here from the basic thermodynamic principle that the entropy in an isolated system always assumes its maximum value at chemical equilibrium.

关 键 词：DERIVATION THERMODYNAMIC assume 

分 类 号：O17[理学—数学]