LOMA, Université de Bordeaux and CNRS, 351 cours de la Libération, F-33405 Talence, France.
J Phys Condens Matter. 2014 Jan 22;26(3):035105. doi: 10.1088/0953-8984/26/3/035105. Epub 2013 Dec 12.
We study thermal diffusion in binary mixtures in the framework of non-equilibrium thermodynamics. Our formal result displays the role of partial enthalpies hi and Onsager's generalized mobilities Ai. The ratio A1/A2 provides a measure for the irreversible character of thermal diffusion. Comparison with experimental data on benzene, cyclohexane, toluene and n-alkanes shows that irreversibility is essential for thermal diffusion, and in particular for the isotope effect.
我们在非平衡热力学的框架下研究二元混合物中的热扩散。我们的形式结果显示了偏焓 hi 和 Onsager 广义迁移率 Ai 的作用。比率 A1/A2 提供了衡量热扩散不可逆性的指标。与苯、环己烷、甲苯和正烷烃的实验数据进行比较表明，不可逆性对于热扩散，特别是对于同位素效应是至关重要的。
