Heat Conductivity in Polyatomic or Electronically Excited Gases. II
Heat Conductivity in Polyatomic or Electronically Excited Gases. II
复制标题
多原子或电子激发气体的热导率。
DOI：
10.1063/1.1743285
复制
发表时间：
1957
影响因子：
4.4
通讯作者：
J. Hirschfelder
中科院分区：
文献类型：
--
作者：
J. Hirschfelder
推导并改进了通常的含内自由度分子导热系数的Eukken方程。在改进的形式中，对于分子的内部自由度的导热系数的校正由因子0.115+0.354 Cp/R给出。在第一部分的帮助下，我们证明了只有当电子态不是亚稳的，并且所有分子量子态的扩散系数相等时，这种近似才是有效的。亚稳态电子物种应该导致非常大的热导系数，而通常的激发电子态，由于它们的巨大尺寸，应该比根据欧肯假设所预期的热导系数小得多。
The usual Eucken equation for the heat conductivity of a molecule with internal degrees of freedom is derived and improved. In the improved form the correction to the coefficient of thermal conductivity for the internal degrees of freedom of the molecule is given by the factor 0.115+0.354 Cp/R. With the help of Part I, we prove that this approximation is valid only if the electronic states are not metastable and if the coefficients of diffusion of all the molecular quantum states are equal. The metastable electronic species should lead to anomalously large coefficients of thermal conductivity, whereas the usual excited electronic states, because of their gigantic size, should give a much smaller contribution to the coefficient of thermal conductivity than would be expected on the basis of the Eucken assumption.