Microscopic Origin of the Equation of Motion for Open Thermodynamic Systems
Abstract
In my previous work (arXiv:2609.07810) \cite{Aydiner_2026}, I derived a second-order equation of motion for open thermodynamic systems from the First Law of Thermodynamics and established its dynamical equivalence with mechanical oscillators and electrical RLC circuits. In the present study, I independently recover the same mathematical structure of the equation of motion from a mesoscopic model of particle transfer between two reservoirs connected by a channel. Starting from collective momentum balance, particle conservation, and reservoir chemical-potential response, I derive the inertial--dissipative--restoring dynamics and obtain explicit expressions for its effective coefficients in terms of the physical parameters of the system. The resulting equation predicts distinct damping regimes, characteristic relaxation time scales, and resonance under periodic driving. The natural frequency and resonance conditions are explicitly determined by the physical parameters of the particle-transfer system. In the slow-transport limit, the model recovers the conventional Onsager-type linear flux--force relation. The independent emergence of the same dynamical structure from two distinct physical approaches provides theoretical support for the previously proposed thermodynamic equation of motion. By identifying the physical mechanisms underlying its effective coefficients, the present study strengthens the physical foundations of the proposed framework and supports the possibility of describing open thermodynamic systems within a common dynamical framework shared with mechanical and electrical systems.
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BibTeX
@misc{aydiner2026microscopic,
title = {{Microscopic Origin of the Equation of Motion for Open Thermodynamic Systems}},
author = {E. Aydiner},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.03235},
eprint = {2611.03235},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.03235},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Microscopic Origin of the Equation of Motion for Open Thermodynamic Systems
AU - E. Aydiner
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.03235
UR - https://arxiv.org/abs/2611.03235
AB - In my previous work (arXiv:2609.07810) \cite{Aydiner_2026}, I derived a second-order equation of motion for open thermodynamic systems from the First Law of Thermodynamics and established its dynamical equivalence with mechanical oscillators and electrical RLC circuits. In the present study, I independently recover the same mathematical structure of the equation of motion from a mesoscopic model of particle transfer between two reservoirs connected by a channel. Starting from collective momentum balance, particle conservation, and reservoir chemical-potential response, I derive the inertial--dissipative--restoring dynamics and obtain explicit expressions for its effective coefficients in terms of the physical parameters of the system. The resulting equation predicts distinct damping regimes, characteristic relaxation time scales, and resonance under periodic driving. The natural frequency and resonance conditions are explicitly determined by the physical parameters of the particle-transfer system. In the slow-transport limit, the model recovers the conventional Onsager-type linear flux--force relation. The independent emergence of the same dynamical structure from two distinct physical approaches provides theoretical support for the previously proposed thermodynamic equation of motion. By identifying the physical mechanisms underlying its effective coefficients, the present study strengthens the physical foundations of the proposed framework and supports the possibility of describing open thermodynamic systems within a common dynamical framework shared with mechanical and electrical systems.
ER -