Results 1 to 10 of about 684,125 (304)

Analysis of Homogeneous/Heterogeneous Reactions in an Electrohydrodynamic Environment Utilizing the Second Law [PDF]

open access: yesMicromachines, 2023
In this study, we investigate what happens to entropy in the presence of electrokinetic phenomena. It is speculated that the microchannel has an asymmetrical and slanted configuration.
Farida Aslam   +3 more
doaj   +2 more sources

The Second Law and Entropy Misconceptions Demystified [PDF]

open access: yesEntropy, 2020
The challenges and claims of hypothetical violations of the Second Law of thermodynamics have been a topic of many scientific, philosophical and social publications, even in the most prestigious scientific journals.
Milivoje M. Kostic
doaj   +2 more sources

Second Law and Its Amendment: The Axiom of No-Reversible Directions Revisited [PDF]

open access: yesEntropy, 2023
A toy model is used to describe the following steps to achieve the no-reversible-direction axiom in a tutorial manner: (i) choose a state space results in the balance equations on state space which are linear in the process directions, (ii) avoid a ...
Wolfgang Muschik
doaj   +2 more sources

The Second Law of Thermodynamics as a Force Law. [PDF]

open access: yesEntropy (Basel), 2018
The second law of thermodynamics states the increase of entropy, Delta S > 0, for real processes from state A to state B at constant energy from chemistry over biological life and engines to cosmic events. The connection of entropy to information, phase-space and heat is helpful, but does not immediately convince observers of the validity and ...
Schlitter J.
europepmc   +6 more sources

Landauer Principle and the Second Law in a Relativistic Communication Scenario [PDF]

open access: yesEntropy
The problem of formulating thermodynamics in a relativistic scenario remains unresolved, although many proposals exist in the literature. The challenge arises due to the intrinsic dynamic structure of spacetime as established by the general theory of ...
Yuri J. Alvim, Lucas C. Céleri
doaj   +2 more sources

Second Law and Non-Equilibrium Entropy of Schottky Systems—Doubts and Verification– [PDF]

open access: yesEntropy, 2018
Meixner’s historical remark in 1969 “... it can be shown that the concept of entropy in the absence of equilibrium is in fact not only questionable but that it cannot even be defined....” is investigated from today’s insight ...
Wolfgang Muschik
doaj   +2 more sources

Second Law Analysis for the Experimental Performances of a Cold Heat Exchanger of a Stirling Refrigeration Machine [PDF]

open access: yesEntropy, 2020
The second law of thermodynamics is applied to evaluate the influence of entropy generation on the performances of a cold heat exchanger of an experimental Stirling refrigeration machine by means of three factors: the entropy generation rate N S
Steve Djetel-Gothe   +2 more
doaj   +2 more sources

Thermal performance in heat exchangers by the irreversibility, effectiveness, and efficiency concepts using nanofluids [PDF]

open access: yesЖурнал інженерних наук, 2020
The objective of the work is to obtain the outlet temperatures of the fluids in a shell and tube heat exchanger. The second law of thermodynamics is applied through the concepts of efficiency, effectiveness, and irreversibility to analyze the results ...
Nogueira E.
doaj   +1 more source

Nonequilibrium Entropy Conservation and the Transport Equations of Mass, Momentum, and Energy

open access: yesEnergies, 2021
Nonequilibrium statistical mechanics or molecular theory has put the transport equations of mass, momentum and energy on a firm or rigorous theoretical foundation that has played a critical role in their use and applications. Here, it is shown that those
Michael H. Peters
doaj   +1 more source

Decoherence, chaos, and the second law [PDF]

open access: yesPhysical Review Letters, 1994
We investigate implications of decoherence for quantum systems which are classically chaotic. We show that, in open systems, the rate of von Neumann entropy production quickly reaches an asymptotic value which is: (i) independent of the system-environment coupling, (ii) dictated by the dynamics of the system, and (iii) dominated by the largest Lyapunov
Zurek, Wojciech Hubert, Paz, Juan Pablo
openaire   +3 more sources

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