A note on maxima and minima of dissipation in context of treatment of irreversible thermodynamic systems by application of Extremal Principles

0573098 - ÚFM 2024 RIV GB eng J - Článek v odborném periodiku
Svoboda, Jiří - Hackl, K. - Fischer, F. D.
A note on maxima and minima of dissipation in context of treatment of irreversible thermodynamic systems by application of Extremal Principles.
Scripta Materialia. Roč. 233, AUG (2023), č. článku 115519. ISSN 1359-6462. E-ISSN 1872-8456
Institucionální podpora: RVO:68081723
Klíčová slova: Alloys * Diffusion * Modeling * Thermodynamics * Extremal principles
Obor OECD: Thermodynamics
Impakt faktor: 6, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S1359646223002439?via%3Dihub

It is generally accepted that the kinetics of evolution of dissipative systems (e.g. by diffusion) can be treated by Extremal Principles. There is still quite a confusion concerning which extremum (maximum or minimum) of the dissipation corresponds to the system evolution. In the paper it is clearly shown that if the system is in general non-equilibrium state its evolution corresponds to the instantaneous constrained maximum of dissipation. In contrary, if the system reaches its steady state, the dissipation is minimized with respect of all possible ways of system evolution consistent with fixed conditions on its surface. Moreover, the value of the maximal dissipation in most cases decreases to its minimum value when the actual configuration approaches its steady state. Although the results show agreement with the existing literature, the problem is still not sufficiently clarified there.
Trvalý link: https://hdl.handle.net/11104/0343669