Results 41 to 50 of about 5,971 (239)

Nonequilibrium Thermodynamics of Spacetime [PDF]

open access: yesPhysical Review Letters, 2006
It has previously been shown that the Einstein equation can be derived from the requirement that the Clausius relation dS = dQ/T hold for all local acceleration horizons through each spacetime point, where dS is one quarter the horizon area change in Planck units, and dQ and T are the energy flux across the horizon and Unruh temperature seen by an ...
Eling, Christopher   +2 more
openaire   +3 more sources

Nonequilibrium thermodynamics of turbulence and stochastic fluid systems

open access: yesNew Journal of Physics, 2020
Fluid systems are found in the Universe at various scales. Turbulence as a complex form of fluid motion far from thermodynamic equilibrium remains one of the most challenging problems in physics.
Wei Wu, Jin Wang
doaj   +1 more source

Accumulation of Particles and Formation of a Dissipative Structure in a Nonequilibrium Bath

open access: yesEntropy, 2022
The standard textbooks contain good explanations of how and why equilibrium thermodynamics emerges in a reservoir with particles that are subjected to Gaussian noise.
Steven Yuvan, Martin Bier
doaj   +1 more source

Thermodynamics of nonequilibrium radiation. (I) General theory [PDF]

open access: yes, 2015
An in-depth study of the thermodynamics of nonequilibrium radiation is presented, The characterization of its nonequilibrium. macroscopic state is performed in the framework of Informational Statistical Thermodynamics.
Vasconcellos, AR   +3 more
core   +1 more source

Nonequilibrium thermodynamics of quantum friction [PDF]

open access: yesPhysical Review A, 2020
Thermodynamic principles are often deceptively simple and yet surprisingly powerful. We show how a simple rule, such as the net flow of energy in and out of a moving atom under nonequilibrium steady state condition, can expose the shortcomings of many popular theories of quantum friction.
D. Reiche   +4 more
openaire   +2 more sources

Precipitation Simulations of the O‐Phase in Ti2AlNb Alloys Processed by Laser Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Simulated and experimental evolution of the O‐phase volume fraction during postprocessing of a Ti‐21Al‐25Nb (at.%) alloy processed by laser powder bed fusion. With results of sensitivity to input parameters from a thorough and quantified analysis, the interfacial energy matrix/precipitate is the most relevant input parameter for the simulation of the O‐
Silvana Tumminello   +7 more
wiley   +1 more source

Nonequilibrium thermodynamics : transport and rate processes in physical, chemical and biological systems / [PDF]

open access: yes, 2007
Natural phenomena consist of simultaneously occurring transport processes and chemical reactions. These processes may interact with each other and lead to instabilities, fluctuations, and evolutionary systems. The objective of this book is to explore the
Demirel, Yaşar.
core  

Dirac structures in nonequilibrium thermodynamics [PDF]

open access: yes, 2017
International audienceDirac structures are geometric objects that generalize both Poisson structures and presymplectic structures on manifolds. They naturally appear in the formulation of constrained mechanical systems.
François Gay-Balmaz   +3 more
core   +1 more source

Mesoscopic non-equilibrium thermodynamics

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2008
Basic concepts like energy, heat, and temperature have acquired a precise meaning after the development of thermodynamics. Thermodynamics provides the basis for understanding how heat and work are related and with the general rules that the macroscopic ...
Rubi, Jose' Miguel
doaj   +1 more source

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink   +4 more
wiley   +1 more source

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