Results 1 to 10 of about 61,540 (296)

Effects of Specimen Thickness and Non-Isothermal Process on Creep Behavior of AA2024 Aluminum Alloy [PDF]

open access: goldMetals, 2023
Fiber metal laminate (FML) is a kind of lightweight material that has garnered much attention in recent years due to its excellent properties under tensile, flexure, and impact conditions.
Xintong Wu   +5 more
doaj   +2 more sources

Unified comprehension of the kinetics of isothermal ceramic processes under field-free and resonant wave-field conditions [PDF]

open access: yesCerâmica, 2021
This paper proposes a unified comprehension of the isothermal ceramic process kinetics stemming from mesoscopic irreversible thermodynamics. Accordingly, a unified process kinetic equation (UPKE) is derived, which predicts that the global isothermal ...
B. Wong
doaj   +1 more source

Simulating Finite-Time Isothermal Processes with Superconducting Quantum Circuits

open access: yesEntropy, 2021
Finite-time isothermal processes are ubiquitous in quantum-heat-engine cycles, yet complicated due to the coexistence of the changing Hamiltonian and the interaction with the thermal bath.
Jin-Fu Chen, Ying Li, Hui Dong
doaj   +1 more source

Study on quasi-isothermal expansion process of compressed air based on spray heat transfer

open access: yesEnergy Reports, 2022
The piston expander with compressed air as working medium has been widely studied for its advantages of cleanliness, reliability and safety, but its application is limited by low exhaust temperature and low output power/efficiency.
Qihui Yu   +3 more
doaj   +1 more source

Fluid Flow and Heat Transfer Behaviors under Non-Isothermal Conditions in a Four-Strand Tundish

open access: yesMetals, 2022
In the continuous casting process, the fluid flow of molten steel in the tundish is in a non-isothermal state. Because of the geometric shape and process parameters of a multi-strand tundish, the fluid flow behavior of each strand is quite inhomogeneous,
Mingmei Zhu   +5 more
doaj   +1 more source

Adiabatic Theorems and Reversible Isothermal Processes [PDF]

open access: yesLetters in Mathematical Physics, 2005
Isothermal processes of a finitely extended, driven quantum system in contact with an infinite heat bath are studied from the point of view of quantum statistical mechanics. Notions like heat flux, work and entropy are defined for trajectories of states close to, but distinct from states of joint thermal equilibrium. A theorem characterizing reversible
Abou-Salem, Walid, Fröhlich, Jürg
openaire   +5 more sources

Numerical Solution of Thermal Phenomena in Welding Problems

open access: yesMathematics, 2023
We present a novel finite element method to solve the thermal variables in welding problems. The mathematical model is based on the enthalpy formulation of the energy conservation law, which is simultaneously valid for the solid, liquid, and mushy ...
Mario Freire-Torres   +2 more
doaj   +1 more source

On the ambiguity of an ideal gas entropy concept

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2020
Based on a critical analysis of the existing characteristics of an ideal gas and the theory of thermodynamic potentials, the article considers its new model, which includes the presence of an ideal gas in addition to kinetic energy of potential (chemical)
V. G. Kiselev
doaj   +1 more source

Comparison of CO2 gasification of coal in isothermal and non-isothermal conditions [PDF]

open access: yesE3S Web of Conferences, 2019
The thermogravimetric method allows to carry out measurements both in isothermal conditions for a given temperature and in non-isothermal conditions at a set heating rate. The aim of the work was to compare the process of gasification of the same coal in
Czerski Grzegorz   +2 more
doaj   +1 more source

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