Results 61 to 70 of about 3,226,193 (375)
Coherence effects in the performance of the quantum Otto heat engine [PDF]
Physical Review A, 2018 The working substance fueling a quantum heat engine may contain prominent quantum properties such as coherence and nonclassical correlations. In particular, coherence has been somewhat related to quantum friction, whose origin has been mostly associated ...
Patrice A. Camati +2 more
semanticscholar +1 more source
8-stroke low heat rejection engine
Energy Reports, 2022 In a combustion engine, 25% of the energy present in the fuel is wasted as heat; this heat is dissipated to avoid overheating and prevent damages. This article presented a simulation work developed to study an internal combustion engine with a low heat ...
D. Silva Cardoso, P. Oliveira Fael
doaj
General Thermodynamic Properties of FRW Universe and Heat Engine
Universe, 2022 In this work, the Friedmann–Robertson–Walker (FRW) Universe is considered a thermodynamic system, where the cosmological constant generates the thermodynamic pressure.
Ujjal Debnath
doaj +1 more source
Efficiency of a Quantum Otto Heat Engine Operating under a Reservoir at Effective Negative Temperatures. [PDF]
Physical Review Letters, 2018 We perform an experiment in which a quantum heat engine works under two reservoirs, one at a positive spin temperature and the other at an effective negative spin temperature, i.e., when the spin system presents population inversion.
R. J. de Assis +6 more
semanticscholar +1 more source
Natural Convection Heat Transfer from an Isothermal Plate
Thermo, 2023 Using boundary-layer theory, natural convection heat transfer formulas that are accurate over a wide range of Rayleigh numbers (Ra) were developed in the 1970s and 1980s for vertical and downward-facing plates.
Aubrey Jaffer
doaj +1 more source
Quantum coherence in a quantum heat engine [PDF]
Journal of Physics A: Mathematical and Theoretical, 2019 We identify that quantum coherence is a valuable resource in the quantum heat engine, which is designed in a quantum thermodynamic cycle assisted by a quantum Maxwell’s demon. This demon is in a superposed state.
Yun-Hao Shi +6 more
semanticscholar +1 more source
Optimizations of Multilevel Quantum Heat Engine with N Noninteracting Fermions Based on Lenoir Cycle [PDF]
Eur. Phys. J. Plus (2022), 137, 1030;, 2021 We consider optimizations of Lenoir heat engine within a quantum dynamical field consisting of $N$ noninteracting fermions trapped in multilevel infinite potential square-well. Fermions play role as working substance of the engine with each particle nested at different level of energy.
arxiv +1 more source
Stochastic heat engine using an active particle. [PDF]
Physical Review E, 2019 The topic of microscopic heat engine has undergone intensive research in recent years. Microscopic heat engines can exploit thermal as well as active fluctuations to extract thermodynamic work.
A. Kumari, P. S. Pal, A. Saha, S. Lahiri
semanticscholar +1 more source
Effects of biofuels properties on aircraft engine performance [PDF]
, 2015 Purpose-The purpose of this paper is to examine the effects of heat capacity and density of biofuels on aircraft engine performance indicated by thrust and fuel consumption.
Kipouros, Timos +2 more
core +1 more source