Results 31 to 40 of about 15,563,700 (262)
, 2011 It is often claimed, or hoped, that some temporal asymmetries are explained by the thermodynamic asymmetry in time. Thermodynamics, the macroscopic physics of pressure, temperature, volume, and so on, describes many temporally asymmetric processes.
Jill North, North, Jill
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A Finite-Time Thermodynamics of Unsteady Fluid Flows [PDF]
Journal of Non-Equilibrium Thermodynamics, 2008 Turbulent fluid has often been conceptualized as a transient thermodynamic phase. Here, a finite-time thermodynamics (FTT) formalism is proposed to compute mean flow and fluctuation levels of unsteady incompressible flows. The proposed formalism builds upon the Galerkin model framework, which simplifies a continuum 3D fluid motion into a finite ...
Noack, Bernd R. +6 more
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Quantum Thermodynamics with Degenerate Eigenstate Coherences
Entropy, 2016 We establish quantum thermodynamics for open quantum systems weakly coupled to their reservoirs when the system exhibits degeneracies. The first and second law of thermodynamics are derived, as well as a finite-time fluctuation theorem for mechanical ...
Gregory Bulnes Cuetara +2 more
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Discretization of continuum physics – a comparison of numerical methods from a physical point of view; pp. 145–154 [PDF]
Proceedings of the Estonian Academy of Sciences, 2008 For numerical calculations in continuum physics partial differential equations and the space-time are discretized. This can be done in different ways. Common approaches are finite difference methods and finite element methods, more rarely finite volume ...
Heiko Herrmann
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Heat leak term: A signature of irreversibility in analysing the actual SI engine cycle using finite-time thermodynamics [PDF]
FME Transactions, 2022 Due to the headway in innovations, it ends up noticeably unavoidable to do a complex thermodynamic analysis of thermal systems. The major problem faced during the development of a thermodynamic model for the analysis is to check the feasibility of the ...
Joseph Antonio V.K. +1 more
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Finite-time thermodynamics for a single-level quantum dot [PDF]
EPL (Europhysics Letters), 2010 We investigate the finite time thermodynamics of a single-level fermion system interacting with a thermal reservoir through a tunneling junction. The optimal protocol to extract the maximum work from the system when moving the single energy level between an initial higher value and a final lower value in a finite time is calculated from a quantum ...
Esposito, Massimiliano +3 more
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Bluff your Way in the Second Law of Thermodynamics [PDF]
, 2001 The aim of this article is to analyse the relation between the second law of thermodynamics and the so-called arrow of time. For this purpose, a number of different aspects in this arrow of time are distinguished, in particular those of time-(a)symmetry ...
Uffink, Jos, Jos Uffink
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Entropy, 2016 Combining modern thermodynamics theory branches, including finite time thermodynamics or entropy generation minimization, constructal theory and entransy theory, with metallurgical process engineering, this paper provides a new exploration on generalized
Lingen Chen, Huijun Feng, Zhihui Xie
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Thermodynamics and fluctuations in finite-time quantum heat engines under reservoir squeezing
Physical Review Research, 2023 We investigate the thermodynamics and fluctuations of a finite-time quantum Otto engine alter- natively driven by a hot-squeezed and a cold thermal reservoir.
Yang Xiao +6 more
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Finite time thermodynamics analysis and research of pulsating heat pipe cold storage device
Energy Storage and Saving, 2022 Phase change energy storage technology can effectively solve the energy mismatch in space and time. There are many disadvantages of phase change materials (PCMs), such as high supercooling, phase separation and poor heat transfer performance.
Xiaofeng Xu, Xuelai Zhang
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