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Relevant bibliographies by topics / Adiabatic expansion model

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Journal articles

Academic literature on the topic 'Adiabatic expansion model'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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Journal articles on the topic "Adiabatic expansion model"

1

DI STASIO, M., E. ERCOLESSI, G. MORANDI, R. RIGHI, A. TAGLIACOZZO, and G. P. ZUCCHELLI. "EFFECTIVE ACTION AND ADIABATIC EXPANSIONS FOR THE 1-D AND 2-D HUBBARD MODELS AT HALF-FILLING." International Journal of Modern Physics B 08, no. 10 (1994): 1391–416. http://dx.doi.org/10.1142/s0217979294000634.

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We analyze here the occurrence of antiferromagnetic (AFM) correlations in the half-filled Hubbard model in one and two space dimensions using a natural fermionic representation of the model and a newly proposed way of implementing the half-filling constraint. We find that our way of implementing the constraint is capable of enforcing it exactly already at the lowest levels of approximation. We discuss how to develop a systematic adiabatic expansion for the model and how Berry’s phase contributions arise quite naturally from the adiabatic expansion. At low temperatures and in the continuum limi

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2

GONG, XIU-FANG, GONG-XIAN YANG, PENG LI, YIN WANG, and XI-JING NING. "MOLECULAR DYNAMICS SIMULATION OF PULSED LASER ABLATION." International Journal of Modern Physics B 25, no. 04 (2011): 543–50. http://dx.doi.org/10.1142/s0217979211058122.

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We have developed a simplified molecular-dynamical model for simulating ablation of solid surfaces by laser pulses, and specifically investigated expansion of Cu cloud in vacuum vaporized on the surface, showing that the angular distributions of the plume depend on the shape of the laser spot on the surface. In particular, experimentally observed flipover effects have been obtained, and an adiabatic constant determined from our simulations via an adiabatic expansion model agrees well with previous measurements.

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3

Huleihil, Mahmoud. "Effects of Pressure Drops on the Performance Characteristics of Air Standard Otto Cycle." Physics Research International 2011 (July 27, 2011): 1–7. http://dx.doi.org/10.1155/2011/496057.

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The effects of pressure drops on the performance characteristics of the air standard Otto cycle are reported. The pressure drops are assumed as constant values independent of the engine size. It has been shown that the pressure drops to about 60% of the maximum pressure in the ideal cycle (Curto-Risso et al., 2008). Three different models are studied: constant pressure model, reversible adiabatic expansion model and polytropic expansion model. The findings of this study show that, at this level of pressure drop, the maximum efficiency of the Otto cycle is reduced by 15% approximately based on

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4

Dil, Emre, Ahmet Mecit Oztas, and Elif Dil. "Testing adiabatic expansion of polytropic universe model with SNe Ia data." Physica Scripta 95, no. 6 (2020): 065005. http://dx.doi.org/10.1088/1402-4896/ab8a73.

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5

Kurschat, Th, H. Chaves, and G. E. A. Meier. "Complete adiabatic evaporation of highly superheated liquid jets." Journal of Fluid Mechanics 236 (March 1992): 43–59. http://dx.doi.org/10.1017/s0022112092001332.

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A nozzle expansion into a vacuum chamber was used to investigate the evaporation of highly superheated liquid jets. The large molar specific heat of fluids with high molecular complexity — in this case C6F14 — is responsible for the new phenomena reported here. A model was developed to describe the basic physical effects. A cubic equation of state was used to describe the thermodynamic properties of the fluid. The evaporation was modelled as a sonic deflagration followed by an axisymmetric supersonic expansion. As in the case of hypersonic gas jets the final state is reached by a normal shock.

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6

Zimnyakov, Dmitry, Roman Zdrajevsky, Nikita Minaev, Evgeniy Epifanov, Vladimir Popov, and Olga Ushakova. "Extreme Foaming Modes for SCF-Plasticized Polylactides: Quasi-Adiabatic and Quasi-Isothermal Foam Expansion." Polymers 12, no. 5 (2020): 1055. http://dx.doi.org/10.3390/polym12051055.

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The experimental evidence on depressurization foaming of the amorphous D,L-polylactide, which is plasticized by subcritical (initial pressures below the critical value) or supercritical (initial pressures above the critical value) carbon dioxide at a temperature above the critical value, relates to two extreme cases: a slow quasi-isothermal foam expansion, and a rapid quasi-adiabatic expansion. Under certain conditions, the quasi-isothermal mode is characterized by the non-monotonic dependencies of the foam volume on the external pressure that are associated with the expansion-to-shrinkage tra

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7

Hajji, Hassnia, Lioua Kolsi, Faouzi Askri, Chemseddine Maatki, Walid Hassen, and Mohamed Borjini. "Heat transfer and flow structure through a backward-and forward-facing step micro-channels equipped with obstacles." Thermal Science, no. 00 (2020): 219. http://dx.doi.org/10.2298/tsci200215219h.

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This study presents two-dimensional simulations of a flow-through a sudden expansion/contraction micro-channel with the existence of obstacles. The bottom wall is maintained at constant flux, while the other walls are adiabatic. Rectangular adiabatic obstacles are mounted before the expansion region on the upper and lower wall of the channel used. The finite element method was used to discretize the equations that govern the physical model. Results indicate the apparition of a separate vortex, situated in the corner after the sudden expansion of the microchannel for low Reynolds numbers. For h

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8

GOPAKUMAR, P., and G. V. VIJAYAGOVINDAN. "BRANE WORLD DYNAMICS AND ADIABATIC MATTER CREATION." International Journal of Modern Physics D 15, no. 03 (2006): 321–34. http://dx.doi.org/10.1142/s0218271806008383.

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We treat the adiabatic matter creation process in various three-brane models by applying the thermodynamics of open systems. The matter creation rate is found to affect the evolution of the scale factor and energy density of the universe. We find a modification at the early stages of cosmic dynamics. In GB and RS brane worlds, by choosing appropriate parameters we obtain the standard scenario, while the warped DGP model has different solutions. During later stages, since matter creation is negligible, the evolution reduces to FRW expansion, in the RS and GB models.

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9

Xu, Qian, and Zhong-Qi Wang. "Model for Calculating Seismic Wave Spectrum Excited by Explosive Source." Shock and Vibration 2021 (June 3, 2021): 1–15. http://dx.doi.org/10.1155/2021/6544453.

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To reveal the characteristics and laws of the seismic wavefield amplitude-frequency excited by explosive source, the method for computing the seismic wave spectrum excited by explosive was studied in this paper. The model for calculating the seismic wave spectrum excited by explosive source was acquired by taking the seismic source model of spherical cavity as the basis. The results of using this model show that the main frequency and the bandwidth of the seismic waves caused by the explosion are influenced by the initial detonation pressure, the adiabatic expansion of the explosive, and the g

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10

GOLDMAN, T., K. MALTMAN, G. J. STEPHENSON, JIA-LUN PING, and FAN WANG. "SYSTEMATIC THEORETICAL SEARCH FOR DIBARYONS IN A RELATIVISTIC MODEL." Modern Physics Letters A 13, no. 01 (1998): 59–70. http://dx.doi.org/10.1142/s0217732398000097.

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A relativistic quark potential model is used to do a systematic search for quasi-stable dibaryon states in the u, d and s three-flavor world. Flavor symmetry breaking and channel coupling effects are included and an adiabatic method and fractional parentage expansion technique are used in the calculations. The relativistic model predicts dibaryon candidates completely consistent with the nonrelativistic model.

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