Results 11 to 20 of about 178,933 (313)

Natural convection of rectangular cavity enhanced by obstacle and fin to simulate phase change material melting process using Lattice Boltzmann method

open access: yesAlexandria Engineering Journal, 2023
In recent years, the lattice Boltzmann method has become a powerful method for computational modeling of various complex fluid flow concerns, including the simulation of the melting process in phase change materials.
Gongxing Yan   +6 more
doaj   +1 more source

ADIABATIC PROCESS AND CHERN NUMBERS [PDF]

open access: yesModern Physics Letters B, 2008
We study quantum processes with two or more adiabatic parameters. When the parameters are compactified, a derivative of the Hamiltonian is closely related to a first Chern number. This topological formulation is applied to the AC Josephson effect and the spin Hall effect in semiconductors.
Mahito Kohmoto, Jun Goryo
openaire   +3 more sources

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

Topological classification of adiabatic processes [PDF]

open access: yesPhysical Review B, 2011
Certain band insulators allow for the adiabatic pumping of quantized charge or spin for special time-dependences of the Hamiltonian. These "topological pumps" are closely related to two dimensional topological insulating phases of matter upon rolling the insulator up to a cylinder and threading it with a time dependent flux.
Dganit Meidan   +2 more
openaire   +3 more sources

Adiabaticity of emittance exchange due to crossing of the coupling resonance

open access: yesPhysical Review Accelerators and Beams, 2021
In circular accelerators, crossing the linear coupling resonance induces the exchange of the transverse emittances, provided the process is adiabatic. This has been considered in some previous works, where the description of the phenomenon has been laid ...
A. Bazzani   +3 more
doaj   +1 more source

Efficient cascaded wavelength conversion under two-peak modulated Stark-chirped rapid adiabatic passage via grating structures

open access: yesResults in Physics, 2021
In this paper, we demonstrate a domain inversion crystal structure to study the cascaded three-wave mixing process in a two peak Stark-chirped rapid adiabatic passage.
Handa Zhang   +6 more
doaj   +1 more source

The use of artificial neural networks in adiabatic curves modeling [PDF]

open access: yes, 2008
Adiabatic hydration curves are the most suitable data for temperature calculations in concrete hardening structures. However, it is very difficult to predict the adiabatic hydration curve of an arbitrary concrete mixture.
Kavčič, Franci   +2 more
core   +2 more sources

A theoretical analysis of temperature rise of hydrogen in high-pressure storage cylinder during fast filling process

open access: yesAdvances in Mechanical Engineering, 2020
During the fast filing process, thermal stress is generated due to the increase in the pressure and temperature of hydrogen in the hydrogen storage tank.
Ji-Qiang LI   +5 more
doaj   +1 more source

Theoretical study on the application of isothermal compression technology in vapor‐compression refrigeration systems with an isothermal piston

open access: yesEnergy Science & Engineering, 2021
Vapor‐compression refrigeration systems are widely used in refrigeration equipment. Theoretically, the process is typically divided into two isobaric processes: an adiabatic isentropic compression process and adiabatic isentropic throttling process.
Yu Hu   +5 more
doaj   +1 more source

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