文章基本信息

标题：On the Positivity of Entropy Production in Multiphase Thermodynamic Systems
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作者：Aarón Romo-Hernandez ; Nicolas Hudon ; B. Erik Ydstie 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2019
卷号：52
期号：7
页码：13-18
DOI：10.1016/j.ifacol.2019.07.003
语种：English
出版社：Elsevier
摘要：AbstractMultiphase processes are frequently assumed to evolve restricted by thermodynamic equilibrium relations. In this article, we study the possibility of multiphase systems to evolve far from thermodynamic equilibrium while contained in what we call a domain of physical feasibility. We show that processes evolving in the domain of feasibility have a positive definite internal entropy production rate. Being positive definite, the internal entropy production stands as a Lyapunov function candidate to characterize the stability of equilibrium for irreversible multiphase systems contained in the feasibility domain. In addition, the thermodynamic-based approach considered in our study provides phenomenological insight into the dynamic properties of multiphase systems. Counter-flow interface molar transport processes, for instance, are found to be thermodynamically stable provided that the transport is bounded by a function that depends on the deviation from thermodynamic equilibrium.
关键词：KeywordsNon-equilibrium thermodynamicsIrreversible thermodynamicsMultiphase systemsFlash-drumLyapunov stabilityInternal entropy production