Results 21 to 30 of about 20,343,435 (287)

Time, Irreversibility and Entropy Production in Nonequilibrium Systems

open access: yesEntropy, 2020
The aim of this review is to shed light on time and irreversibility, in order to link macroscopic to microscopic approaches to these complicated problems.
Umberto Lucia   +2 more
doaj   +1 more source

Progresses in generalized thermodynamic dynamic-optimization of irreversible processes

open access: yesScientia Sinica Technologica, 2019
Generalized thermodynamic optimization theory is one of the research hotspots in the field of thermal science and technology. Firstly, the emergences and developments of finite time thermodynamics, entropy generation minimization, entransy theory and ...
Lingen Chen, Shaojun Xia
semanticscholar   +1 more source

Description of Transfer Processes in a Locally Nonequilibrium Medium

open access: yesEntropy, 2018
This paper presents a description of the fluctuations in transfer processes in a locally nonequilibrium medium. We obtained equations which allow the fluctuations range to be determined for a transferred physical value.
Andrey N. Morozov
doaj   +1 more source

Irreversible processes without energy dissipation in an isolated Lipkin-Meshkov-Glick model. [PDF]

open access: yesPhysical review. E, Statistical, nonlinear, and soft matter physics, 2014
For a certain class of isolated quantum systems, we report the existence of irreversible processes in which the energy is not dissipated. After a closed cycle in which the initial energy distribution is fully recovered, the expectation value of a ...
R. Puebla, A. Relaño
semanticscholar   +1 more source

Microscopic theory of irreversible processes [PDF]

open access: yesProceedings of the National Academy of Sciences, 1977
The microscopic theory of irreversible processes that we developed is summarized and illustrated, using as a simple example the Friedrichs model. Our approach combines the Poincaré's point of view (dynamical interpretation of irreversibility) with the Gibbs-Einstein ensemble point of view.
Prigogine, Ilya   +3 more
openaire   +3 more sources

From Lagrangian Mechanics to Nonequilibrium Thermodynamics: A Variational Perspective

open access: yesEntropy, 2018
In this paper, we survey our recent results on the variational formulation of nonequilibrium thermodynamics for the finite-dimensional case of discrete systems, as well as for the infinite-dimensional case of continuum systems.
François Gay-Balmaz, Hiroaki Yoshimura
doaj   +1 more source

Foundations of the Relative Constancy of Mean Velocity for Natural Streams: A General Principle of Steady State Anticipated by L. Prandtl and L. Leopold [PDF]

open access: yesInternational Journal of Mathematical, Engineering and Management Sciences, 2020
Mean velocity is a key parameter for understanding, modeling and predicting the complex phenomena of advection and dispersion in natural watercourses, which are threatened by human intervention and river disasters.
Alfredo José Constaín Aragón   +2 more
doaj   +1 more source

Energetic self-organization and development of the structural scheme of a polymer fiber tribosystem [PDF]

open access: yesE3S Web of Conferences, 2023
The article presents the results of the analysis of the main processes of friction of polymeric materials during friction with fibrous mass from the standpoint of irreversible processes and developed a block diagram of a polymer fiber tribosystem.
Almataev Tojiboy   +2 more
doaj   +1 more source

The rehabilitation of irreversible processes and dissipative structures’ 50th anniversary

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018
In 2017, Ilya Prigogine would have been 100 years of age. As for any human being, this centenary is a notable event. For him, as a scientist, 2017 was also above all the 50th anniversary of dissipative structures. It was indeed in 1967 that for the first
R. Lefever
semanticscholar   +1 more source

Slow Dynamics and Thermodynamics of Open Quantum Systems

open access: yesProceedings, 2019
We develop a perturbation theory to estimate the finite time corrections around a quasi static trajectory, in which a quantum system is able to equilibrate at each instant with its environment.
Vasco Cavina   +2 more
doaj   +1 more source

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