Abstract

The Maxwell–Stefan diffusion equations for multicomponent neutral gas mixtures with thermodiffusion ratios and diffusion correction factors in the Chapman–Cowling third-order approximation are derived. These thermodiffusion ratios and diffusion correction factors are presented explicitly as functions of masses, number densities, thermal conductivities, and the Chapman–Cowling collision integrals of the neutral species under consideration. Applications to the multicomponent mixture of atmospheric neutral gases O, N₂, O₂, He, H, Ar, H₂, N, and NO are considered, and recommendations are given for using the results of this paper in studies of the Earth's atmosphere.

中文翻译：

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地球大气中中性气体的热扩散和扩散校正因子

摘要

推导出了多组分中性气体混合物的 Maxwell-Stefan 扩散方程，其中包含 Chapman-Cowling 三阶近似中的热扩散比和扩散校正因子。这些热扩散比和扩散校正因子明确表示为质量、数密度、热导率和所考虑的中性物质的 Chapman-Cowling 碰撞积分的函数。考虑了在大气中性气体 O、N ₂、O ₂、He、H、Ar、H ₂、N 和 NO的多组分混合物中的应用，并提出了将本文的结果用于地球大气研究的建议.