Results 41 to 50 of about 265,948 (327)
Entropy Production and the Maximum Entropy of the Universe [PDF]
The 5th International Electronic Conference on Entropy and Its Applications, 2019 The entropy of the observable universe has been calculated as Suni ~ 10104 k and is dominated by the entropy of supermassive black holes. Irreversible processes in the universe can only happen if there is an entropy gap ΔS between the entropy of the observable universe Suni and its maximum entropy Smax: ΔS = Smax − Suni.
Vihan M. Patel, Charles Lineweaver
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Numerical investigation of entropy generation of turbulent flow in twisted tri-lobed tubes
Case Studies in Thermal Engineering, 2023 Twisted tri-lobed tubes have garnered attention due to their exceptional heat transfer efficiency and straightforward fabrication. Existing literature lacks comprehensive assessments of the overall heat transfer performance of twisted tri-lobed tubes ...
Kexin Liu +5 more
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Entropy production and fluctuation theorems in a continuously monitored optical cavity at zero temperature [PDF]
Quantum, 2022 Fluctuation theorems allow one to make generalised statements about the behaviour of thermodynamic quantities in systems that are driven far from thermal equilibrium. In this article we use Crooks' fluctuation theorem to understand the entropy production
Michael J. Kewming, Sally Shrapnel
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Chaos and information entropy production [PDF]
Journal of Physics A: Mathematical and General, 2000 We consider a general N-degree-of-freedom nonlinear Hamiltonian system which is chaotic and dissipative and show that the origin of chaotic diffusion lies in the correlation of fluctuation of linear stability matrix for the equation of motion of the dynamical system whose phase space variables behave as stochastic variables in the chaotic regime. Based
Bidhan Chandra Bag +2 more
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Entropy production in affine inflation [PDF]
Physical Review D, 2020 Multiple scalar fields nonminimally interacting through pure affine gravity are considered to generate primordial perturbations during an inflationary phase. The couplings considered give rise to two distinct sources of entropy perturbations that may not be suppressed in the long wavelength limit.
Hemza Azri, Salah Nasri
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Calculation of the Entropy Balance Equation in a Non-equilibrium Reaction-diffusion System
Entropy, 2010 In this article, we discuss the relationships between thermodynamic quantities and the spatial pattern in a reaction-diffusion model based on the reversible Gray-Scott model.
Tomohiko Yamaguchi, Hitoshi Mahara
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Entropy production theorems and some consequences [PDF]
, 2009 The total entropy production fluctuations are studied in some exactly solvable models. For these systems, the detailed fluctuation theorem holds even in the transient state, provided initially the system is prepared in thermal equilibrium.
Jayannavar, A. M. +2 more
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Photosynthesis and negative entropy production
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2005 The widely held view that the maximum efficiency of a photosynthetic pigment system is given by the Carnot cycle expression (1-T/Tr) for energy transfer from a hot bath (radiation at temperature Tr) to a cold bath (pigment system at temperature T) is critically examined and demonstrated to be inaccurate when the entropy changes associated with the ...
Jennings RC +4 more
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Macroscopic Time-Reversal Symmetry Breaking at Nonequilibrium Phase Transition
, 2015 We study the entropy production in a macroscopic nonequilibrium system that undergoes an order-disorder phase transition. Entropy production is a characteristic feature of nonequilibrium dynamics with broken detailed balance. It is found that the entropy
Chun, Hyun-Myung +2 more
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Physical Review X, 2017 We study the statistics of infima, stopping times, and passage probabilities of entropy production in nonequilibrium steady states, and we show that they are universal. We consider two examples of stopping times: first-passage times of entropy production
Izaak Neri +2 more
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