Minimum entropy production principle (MEPP) is an important variational principle for the evolution of systems to nonequilibrium stationary state. However, its restricted validity in the domain of Onsager's linear theory requires an inverse temperature square-dependent thermal conductivity for heat conduction problems. A previous derivative principle of MEPP still limits to constant thermal conductivity case. Therefore, the present work aims to generalize the MEPP to remove these nonphysical limitations. A new dissipation potential is proposed, the minimum of which thus corresponds to the stationary state with no restriction on thermal conductivity. We give both rigorous theoretical verification of the new extremum principle and systematic numerical demonstration through 1D transient heat conduction with different kinds of temperature dependence of the thermal conductivity. The results show that the new principle remains always valid while MEPP and its derivative principle fail beyond their scopes of validity. The present work promotes a clear understanding of the existing thermodynamic extremum principles and proposes a new one for stationary state in nonlinear heat transport.
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Thermodynamic Extremum Principles for Nonequilibrium Stationary State in Heat Conduction
Yangyu Guo,
Yangyu Guo
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Search for other works by this author on:
Ziyan Wang,
Ziyan Wang
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Search for other works by this author on:
Moran Wang
Moran Wang
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
e-mail: mrwang@tsinghua.edu.cn
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
e-mail: mrwang@tsinghua.edu.cn
Search for other works by this author on:
Yangyu Guo
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Ziyan Wang
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
Moran Wang
Key Laboratory for Thermal Science and
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
e-mail: mrwang@tsinghua.edu.cn
Power Engineering of Ministry of Education,
Department of Engineering Mechanics
and CNMM,
Tsinghua University,
Beijing 100084, China
e-mail: mrwang@tsinghua.edu.cn
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 26, 2016; final manuscript received February 21, 2017; published online April 4, 2017. Assoc. Editor: Robert D. Tzou.
J. Heat Transfer. Jul 2017, 139(7): 071303 (7 pages)
Published Online: April 4, 2017
Article history
Received:
May 26, 2016
Revised:
February 21, 2017
Citation
Guo, Y., Wang, Z., and Wang, M. (April 4, 2017). "Thermodynamic Extremum Principles for Nonequilibrium Stationary State in Heat Conduction." ASME. J. Heat Transfer. July 2017; 139(7): 071303. https://doi.org/10.1115/1.4036086
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