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Metriplectic four-bracket algorithm for constructing thermodynamically consistent dynamical systems

Journal Article · · Physical Review E
DOI:https://doi.org/10.1103/r2lb-xkq6· OSTI ID:2998046
A unified thermodynamic algorithm is presented for constructing thermodynamically consistent dynamical systems, i.e., systems that have Hamiltonian and dissipative parts that conserve energy while producing entropy. The algorithm is based on the metriplectic 4-bracket given in Morrison and Updike [Phys. Rev. E 109, 045202 (2024)]. A feature of the unified thermodynamic algorithm is the force-flux relation 𝐉𝛼=−𝐿𝛼⁢𝛽𝛁(𝛿⁢𝐻⁡/𝛿⁢𝜉𝛽) for phenomenological coefficients 𝐿𝛼⁢𝛽, Hamiltonian 𝐻, and dynamical variables 𝜉𝛽. The algorithm is applied to the Navier-Stokes-Fourier, the Cahn-Hilliard-Navier-Stokes, and Brenner-Navier-Stokes-Fourier systems, and significant generalizations of these systems are obtained.
Research Organization:
The University of Texas at Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
FG02-04ER54742
OSTI ID:
2998046
Journal Information:
Physical Review E, Journal Name: Physical Review E Journal Issue: 2 Vol. 112; ISSN 2470-0053; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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