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Journal articles on the topic 'Thermodynamic behaviors'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Gao, Zeyuan, and Liu Zhao. "Restricted phase space thermodynamics for AdS black holes via holography." Classical and Quantum Gravity 39, no. 7 (March 11, 2022): 075019. http://dx.doi.org/10.1088/1361-6382/ac566c.

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Abstract A new formalism for thermodynamics of AdS black holes called the restricted phase space thermodynamics (RPST) is proposed. The construction is based on top of Visser’s holographic thermodynamics, but with the AdS radius fixed as a constant. Thus the RPST is free of the (P, V) variables but inherits the central charge and chemical potential as a new pair of conjugate thermodynamic variables. In this formalism, the Euler relation and the Gibbs–Duhem equation hold simultaneously with the first law of black hole thermodynamics, which guarantee the appropriate homogeneous behaviors for the black hole mass and the intensive variables. The formalism is checked in detail in the example case of four-dimensional Reissner–Nordström anti-de Sitter black hole in Einstein–Maxwell theory, in which some interesting thermodynamic behaviors are revealed.

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2

Tang, Ying, and Lijun Zhang. "Effect of Thermal Vacancy on Thermodynamic Behaviors in BCC W Close to Melting Point: A Thermodynamic Study." Materials 11, no. 9 (September 7, 2018): 1648. http://dx.doi.org/10.3390/ma11091648.

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As temperature increases, the thermal vacancy concentration in pure metals dramatically increases and causes some strongly non-linear thermodynamic behaviors in pure metals when close to their melting points. In this paper, we chose body-centered cubic (bcc) W as the target and presented a thermodynamic model to account for its Gibbs energy of pure bcc W from 0 K to melting point by including the contribution of thermal vacancy. A new formula for interaction part was proposed for describing the quadratic temperature behavior of vacancy formation energy. Based on the experimental/first-principles computed thermodynamic properties, all the parameters in the Gibbs energy function were assessed by following the proposed two-step optimization strategy. The thermodynamic behaviors, i.e., the strong nonlinear increase for temperature dependence of heat capacities at high temperatures and a nonlinear Arrhenius plot of vacancy concentration, in bcc W can be well reproduced by the obtained Gibbs energy. The successful description of thermal vacancy on such strongly non-linear thermodynamic behaviors in bcc W indicates that the presently proposed thermodynamic model and optimization strategy should be universal ones and are applicable to all other metals.

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3

Belhaj, A., M. Chabab, H. EL Moumni, K. Masmar, and M. B. Sedra. "Ehrenfest scheme of higher dimensional AdS black holes in the third-order Lovelock–Born–Infeld gravity." International Journal of Geometric Methods in Modern Physics 12, no. 10 (October 25, 2015): 1550115. http://dx.doi.org/10.1142/s0219887815501157.

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Interpreting the cosmological constant as a thermodynamic pressure and its conjugate quantity as a thermodynamic volume, we reconsider the investigation of P–V critical behaviors of (1 + n)-dimensional AdS black holes in Lovelock–Born–Infeld gravity. In particular, we derive an explicit expression of the universal number [Formula: see text] in terms of the space dimension n. Then, we examine the phase transitions at the critical points of such black holes for 6 ≤ n < 11 as required by the physical condition of the thermodynamical quantities including criticality behaviors. More precisely, the Ehrenfest equations have been checked and they reveal that the black hole system undergoes a second phase transition at the critical points.

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4

Li, Jun, and Kun Meng. "Black hole solution of Gauss–Bonnet-massive gravity coupled to nonlinear Maxwell and Yang–Mills fields in higher dimensions." Modern Physics Letters A 34, no. 16 (May 29, 2019): 1950121. http://dx.doi.org/10.1142/s0217732319501219.

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We construct a static black hole solution of Gauss–Bonnet-massive gravity coupled to nonlinear Maxwell and Yang–Mills fields in higher dimensions. Then we calculate related thermodynamic quantities, check the validity of the first law of black hole thermodynamics and analyze the phase transition behaviors of the black hole in extended phase space.

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5

Ha, Seung-Yeal, Jeongho Kim, and Tommaso Ruggeri. "Emergent Behaviors of Thermodynamic Cucker--Smale Particles." SIAM Journal on Mathematical Analysis 50, no. 3 (January 2018): 3092–121. http://dx.doi.org/10.1137/17m111064x.

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6

Lan, Chenchen, Qing Lyu, Yana Qie, Maofa Jiang, Xiaojie Liu, and Shuhui Zhang. "Thermodynamic and kinetic behaviors of coal gasification." Thermochimica Acta 666 (August 2018): 174–80. http://dx.doi.org/10.1016/j.tca.2018.06.019.

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7

Xu, Beisi, Lei Huang, and Haojun Liang. "Thermodynamic behaviors of polyampholytes at low temperatures." Journal of Chemical Physics 121, no. 15 (October 15, 2004): 7494–500. http://dx.doi.org/10.1063/1.1792191.

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8

Li, Yushan. "Thermodynamic properties of charged ideal spin-1 bosons in a trap under a magnetic field." Modern Physics Letters B 28, no. 26 (October 10, 2014): 1450206. http://dx.doi.org/10.1142/s0217984914502066.

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Thermodynamics of trapped charged ideal spin-1 bosons confined in a magnetic field are investigated within semi-classical approximation and truncated-summation approach. It is shown that the critical temperature increases slightly at the first, and then decreases slowly with increasing external magnetic field. Charged spin-1 Bose gases present a crossover from diamagnetism to paramagnetism as the spin factor increases. Charged spin-1 Bose gases exhibit distinct thermodynamic behaviors from the spinless case.

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9

BRACCINI, V., D. MARRE', A. MOLLICA, G. GRASSANO, and A. S. SIRI. "DEPOSITION OF (Ba, La)CuO2/CaCuO2 SUPERCONDUCTING MULTILAYERS BY PULSED LASER ABLATION." International Journal of Modern Physics B 14, no. 25n27 (October 30, 2000): 2713–18. http://dx.doi.org/10.1142/s0217979200002818.

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Superconducting multilayers, whose growth and structure are determined by the kinetic deposition instead by thermodynamics, are a powerful tool for investigating high T c superconductors (HTSC) properties. By means of Pulsed Laser Deposition (PLD), we grew such materials alternating infinite layer phases both pure and doped, to supply CuO 2 planes and charge reservoir (CR) blocks respectively. We found out that using chemically doped CR leads to a semiconducting behavior, whereas oxygen doping seems to be much more effective, since the BaCuO 2 infinite phase, grown in high oxygen partial pressure, does actually bring about a superconducting behavior. We deposited BaCuO 2/ CaCuO 2 superlattices with various periodicities and studied their transport and structural properties. By varying the deposition parameters, we reached both kinetic and thermodynamic growth and we observed semiconducting and superconducting behaviors.

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10

Gonzalez-Ayala, Julian, Moises Santillán, Maria Santos, Antonio Calvo Hernández, and José Mateos Roco. "Optimization and Stability of Heat Engines: The Role of Entropy Evolution." Entropy 20, no. 11 (November 9, 2018): 865. http://dx.doi.org/10.3390/e20110865.

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Local stability of maximum power and maximum compromise (Omega) operation regimes dynamic evolution for a low-dissipation heat engine is analyzed. The thermodynamic behavior of trajectories to the stationary state, after perturbing the operation regime, display a trade-off between stability, entropy production, efficiency and power output. This allows considering stability and optimization as connected pieces of a single phenomenon. Trajectories inside the basin of attraction display the smallest entropy drops. Additionally, it was found that time constraints, related with irreversible and endoreversible behaviors, influence the thermodynamic evolution of relaxation trajectories. The behavior of the evolution in terms of the symmetries of the model and the applied thermal gradients was analyzed.

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11

Zheng, Meixia, Fengli Lian, Yujing Zhu, Bo Liu, Zheng Chen, Yi Zhang, Baodong Zheng, and Longtao Zhang. "Modified xanthan gum for crystal violet uptake: kinetic, isotherm, and thermodynamic behaviors." Water Science and Technology 79, no. 1 (January 1, 2019): 165–74. http://dx.doi.org/10.2166/wst.2019.038.

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Abstract Modified xanthan gum (XG-AM-TTE) was employed as an adsorbent to study the adsorption behavior, thermodynamics and kinetics of crystal violet (CV) from an aqueous solution. Fourier transform infrared spectroscopy analysis indicates that the functional groups present in the adsorbent, such as carboxyl, ester and hydroxyl groups, are included on the external surface of the material, and these groups are potential active sites for interaction with CV. According to X-ray diffraction results, the structure of XG-AM-TTE after CV adsorption became more disordered, and the microstructure change is an indication of effective adsorption of CV to the surface, with CV becoming remarkably dispersed in the adsorbent according to the scanning electron microscopy observations. The adsorption kinetics and adsorption equilibrium were best described by the pseudo-second-order model and Freundlich isotherms, respectively. The thermodynamic parameters, as the Gibbs-free energy (ΔG), enthalpy (ΔH) and entropy (ΔS), indicated that the adsorption is a spontaneous, endothermic and entropy increase process. The maximum adsorption capacity of XG-AM-TTE was 183 ± 12 mg/g, suggesting that XG-AM-TTE is an efficient adsorbent.

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12

Türkgenç, Emine, and İhsan Yilmaz. "Some information from thermodynamic curvature of Chaplygin gas." Modern Physics Letters A 34, no. 23 (July 30, 2019): 1950180. http://dx.doi.org/10.1142/s0217732319501803.

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In this paper, we study thermodynamic curvature of Chaplygin gas which is one of the dark energy candidates in terms of entropy and temperature. So, we get some information about past universe by considering thermodynamic curvature of Chaplygin gas. In addition to thermodynamic curvature, we study behaviors of test particle in the universe filled with Chaplygin gas.

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13

Kitamura, Mitsutaka. "Thermodynamic stability and transformation of pharmaceutical polymorphs." Pure and Applied Chemistry 77, no. 3 (January 1, 2005): 581–91. http://dx.doi.org/10.1351/pac200577030581.

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The thermodynamic stability and transformation of pharmaceutical polymorphs was investigated, especially those of the thiazole derivative pharmaceutical, 2-(3-cyano-4-isobutyloxyphenyl)-4-methyl-5-thiazolecarboxylic acid (BPT). The influence of methanol compositions in solvents and temperature on the solubility and the transformation behavior of BPT was clarified. The transformation behavior was explained by the chemical potential difference between the stable and metastable forms. It was shown that a specific solute–solvent interaction contributes to the preferential nucleation and growth of the stable or metastable forms and influences the transformation behaviors. The solubility of BPT of the solvated crystals is much more influenced by the solvent compositions than the true polymorphs. The solubility ratio of the solvated crystals depends on the solvent composition, whereas the solubility ratio of the true polymorphs is considered to be independent of the solvents. The crystallization behavior was also investigated. The transformation rate after crystallization appeared to depend on the initial concentration of BPT and the addition rate of the antisolvent. The cause of this phenomenon was presumed to be a slight inclusion of the stable form in the metastable form.

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14

Li, Yufeng, Xiaoqing Han, Haiyun Jin, and Wen Li. "Understanding superhydrophobic behaviors on hydrophilic materials: a thermodynamic approach." Materials Research Express 8, no. 7 (July 1, 2021): 076403. http://dx.doi.org/10.1088/2053-1591/ac1188.

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15

Xiao, Yuzhong, Jun Chen, and Jian Cao. "A generalized thermodynamic approach for modeling nonlinear hardening behaviors." International Journal of Plasticity 38 (November 2012): 102–22. http://dx.doi.org/10.1016/j.ijplas.2012.05.004.

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16

Peng, Liu, Luo Xiaoyong, Chen Ying, Yu Zhiwu, and Yu Dayou. "Thermodynamic and acoustic behaviors of prefabricated composite wall panel." Structures 28 (December 2020): 1301–13. http://dx.doi.org/10.1016/j.istruc.2020.09.069.

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17

Aydin, Alhun, and Altug Sisman. "Quantum shape effects and novel thermodynamic behaviors at nanoscale." Physics Letters A 383, no. 7 (February 2019): 655–65. http://dx.doi.org/10.1016/j.physleta.2019.01.009.

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18

Ben Slimane, Mourad Ben, Moez Ben Ben Abid, Ines Ben Omrane, and Borhen Halouani. "Directional Thermodynamic Formalism." Symmetry 11, no. 6 (June 21, 2019): 825. http://dx.doi.org/10.3390/sym11060825.

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The usual thermodynamic formalism is uniform in all directions and, therefore, it is not adapted to study multi-dimensional functions with various directional behaviors. It is based on a scaling function characterized in terms of isotropic Sobolev or Besov-type norms. The purpose of the present paper was twofold. Firstly, we proved wavelet criteria for a natural extended directional scaling function expressed in terms of directional Sobolev or Besov spaces. Secondly, we performed the directional multifractal formalism, i.e., we computed or estimated directional Hölder spectra, either directly or via some Legendre transforms on either directional scaling function or anisotropic scaling functions. We obtained general upper bounds for directional Hölder spectra. We also showed optimal results for two large classes of examples of deterministic and random anisotropic self-similar tools for possible modeling turbulence (or cascades) and textures in images: Sierpinski cascade functions and fractional Brownian sheets.

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19

Yang, Li Yan, Yi Hui Guo, and Li Li Yu. "Preparation and Thermodynamics Adsorption Performance of Cobalt Ions on the Crosslinked Starch Microspheres." Advanced Materials Research 726-731 (August 2013): 435–39. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.435.

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A type of cross-linking starch microspheres (CSMs) has been synthesized by reversed phase suspension method using soluble starch as raw material. Crosslinked starch microsphere has good adsorption performance to metal ions in water. The static adsorption behaviors of Co2+on the cross-linked starch microspheresand were investigated. The CSMs and its adsorption product were comparatively characterized by Fourier Transform Infrared Spectroscopy (FTIR). The adsorption behaviour of CSMs in different temperatures is in agreement with the Freundlich isothermal equation and isothermal equation of Langmiur. The thermodynamic parameters of adsorption process indicate that entropy is the main adsorption driving force, and physical adsorption is main about the adsorption behaviors of CSMs on Co2+.These data are helpful for the adsorption separation of metal ions and the treatment of the wastewater containing Co2+. Keywords: cross-linked starch microspheres;cobalt ions;adsorption mechanism;thermodynamics adsorption

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20

Guo, Sen, Ya-Ling Huang, and En-Wei Liang. "Comparison of thermodynamic behaviors of two regular-AdS black holes." Communications in Theoretical Physics 74, no. 2 (February 1, 2022): 025402. http://dx.doi.org/10.1088/1572-9494/ac41c8.

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Abstract Considering the negative cosmological constant of an anti-de Sitter (AdS) background as a positive thermodynamic pressure in the extended phase space, we investigate the P−υ critical behavior and of the cooling–heating phase transition of the regular Hayward-AdS (HAdS) black hole (BH), and compare the difference of some thermodynamic processes in both the HAdS BH and the Bardeen-AdS (BAdS) BH. We found that the phase transition of the BAdS BH tends to be more the van der Waals (vdW) phase transition. For the cooling–heating phase transition, we obtained the inversion curves of the HAdS BH are always higher than the BAdS BH under the same pressure and magnetic charge. We also compare the smallest existence mass, the zero-temperature remnant, and the critical magnetic charge for these two BHs. The results suggested that the inner horizon and the outer horizon of the Hayward BH are easier to merge, and the singularity is easier to expose.

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21

Pan, Bochen, Leping Dang, Zhanzhong Wang, Jun Jiang, and Hongyuan Wei. "Preparation, crystal structure and solution-mediated phase transformation of a novel solid-state form of CL-20." CrystEngComm 20, no. 11 (2018): 1553–63. http://dx.doi.org/10.1039/c7ce02026k.

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22

Zhang, Jinlong, Risheng Qiu, Xinu Tan, Xuantong Quan, Bo Song, and Qing Liu. "The Precipitation Behavior in Al0.3CoCrFeNi High-Entropy Alloy Affected by Deformation and Annealing." Metals 13, no. 1 (January 12, 2023): 157. http://dx.doi.org/10.3390/met13010157.

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The effects of deformation and annealing on the precipitation behaviors, including the structure and chemical composition of the L12, B2, BCC and σ phases, in Al0.3CoCrFeNi high entropy alloy were analyzed. Firstly, the thermodynamic factors controlled the precipitation pathway in as-cast alloys, which led to the L12 precipitating homogeneously in the FCC matrix under a low annealing temperature, while the B2 precipitated under a high annealing temperature. In contrast, if the deformation was introduced before annealing, the precipitation pathway of the second phase was completely changed to the B2, BCC and σ phases because of the combination of thermodynamic and kinetic conditions. In particular, the B2 and σ phases promoted the precipitation behavior reciprocally due to the complementary chemical compositions. The elaborate precipitation behaviors of the L12, B2, BCC and σ phases were analyzed to identify the phase transformation in the Al0.3CoCrFeNi HEA. These transformation pathways and elaborate structural features of the L12, B2, BCC and σ phases provide various design possibilities for the microstructures and properties of single FCC HEAs.

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23

Singh, N. Ibotombi, and Y. Bembem Devi. "Particle Creation with Generalised Gravitational and Cosmological Constants." Journal of the Tensor Society 7, no. 01 (December 30, 2013): 59–68. http://dx.doi.org/10.56424/jts.v7i01.10466.

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In this paper we study the effect of particle creation on the evolution of FRW cosmological model. The universe has been considered as an open thermodynamic system when particle creation leads to supplementary negative creation pressure in addition to the thermodynamic pressure. We also discuss dynamical behaviors of the cosmological solutions of radiation dominated models and stiff models.

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24

Tan, J. J., Y. Li, and G. F. Ji. "High-Pressure Phase Transitions and Thermodynamic Behaviors of Cadmium Sulfide." Acta Physica Polonica A 120, no. 3 (September 2011): 501–6. http://dx.doi.org/10.12693/aphyspola.120.501.

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25

Yu, Guojun, Chengbin Du, and Tiger Sun. "Thermodynamic Behaviors of a Kind of Self-Decoupling Magnetorheological Damper." Shock and Vibration 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/502747.

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A theoretical model of temperature change on a kind of self-decoupling magnetorheological (SDMR) damper was established based on conservation of energy, and the constraint equation for structural design parameters of the SDMR damper was improved to satisfy heat dissipation requirements in this work. According to the theoretical model and improved constraint equation, the main structure parameters of SDMR damper were obtained and the damper was tested. The temperature performance test results indicate that the rising temperature makes the damping force decline, and the main affection factors of temperature variation are excitation methods and input current. The results also show that the improved constraint equation and design method introduced are correct and efficient in the engineering.

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26

Chen, Xue, Zhi-Qiang Zhu, Qiu-Sheng Liu, and Xu-Wen Wang. "Thermodynamic Behaviors of Macroscopic Liquid Droplets Evaporation from Heated Substrates." Microgravity Science and Technology 27, no. 5 (April 9, 2015): 353–60. http://dx.doi.org/10.1007/s12217-015-9426-0.

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27

Lan, Chenchen, Qing Lyu, Xiaojie Liu, Maofa Jiang, Yana Qie, and Shuhui Zhang. "Thermodynamic and kinetic behaviors of coke gasification in N2CO CO2H2H2O." International Journal of Hydrogen Energy 43, no. 42 (October 2018): 19405–13. http://dx.doi.org/10.1016/j.ijhydene.2018.08.216.

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28

Sheykhi, Ahmad. "Rotating Dilaton Black Strings Coupled to Exponential Nonlinear Electrodynamics." Advances in High Energy Physics 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/615041.

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We construct a new class of charged rotating black string solutions coupled to dilaton and exponential nonlinear electrodynamic fields with cylindrical or toroidal horizons in the presence of a Liouville-type potential for the dilaton field. Due to the presence of the dilaton field, the asymptotic behaviors of these solutions are neither flat nor (A)dS. We analyze the physical properties of the solutions in detail. We compute the conserved and thermodynamic quantities of the solutions and verify the first law of thermodynamics on the black string horizon. When the nonlinear parameterβ2goes to infinity, our results reduce to those of black string solutions in Einstein-Maxwell-dilaton gravity.

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29

Marques, Murilo S., Vinicius F. Hernandes, and José Rafael Bordin. "Core-softened water–alcohol mixtures: the solute-size effects." Physical Chemistry Chemical Physics 23, no. 30 (2021): 16213–23. http://dx.doi.org/10.1039/d1cp00751c.

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30

Hai, Pengqi, and Chao Wu. "A comparative DFT study of the oxidation of Al crystals and nanoparticles." Physical Chemistry Chemical Physics 23, no. 41 (2021): 24004–15. http://dx.doi.org/10.1039/d1cp03241k.

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31

Bruno, Nickolaus M., and Matthew R. Phillips. "An Analytical Approach for Computing the Coefficient of Refrigeration Performance in Giant Inverse Magnetocaloric Materials." Magnetism 2, no. 1 (January 13, 2022): 10–30. http://dx.doi.org/10.3390/magnetism2010002.

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An analytical approach for computing the coefficient of refrigeration performance (CRP) was described for materials that exhibited a giant inverse magnetocaloric effect (MCE), and their governing thermodynamics were reviewed. The approach defines the magnetic work input using thermodynamic relationships rather than isothermal magnetization data discretized from the literature. The CRP was computed for only cyclically reversible temperature and entropy changes in materials that exhibited thermal hysteresis by placing a limit on their operating temperature in a thermodynamic cycle. The analytical CRP serves to link meaningful material properties in first-order MCE refrigerants to their potential work and efficiency and can be employed as a metric to compare the behaviors of dissimilar alloy compositions or for materials design. We found that an optimum in the CRP may exist that depends on the applied field level and Clausius–Clapeyron (CC) slope. Moreover, through a large literature review of NiMn-based materials, we note that NiMn(In/Sn) alloys offer the most promising materials properties for applications within the bounds of the developed framework.

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32

SOLDI, LUCA, ANDREA QUAINI, STÉPHANE GOSSÉ, JÜRGEN BRILLO, and MATHIEU ROSKOSZ. "Thermodynamic and thermophysical properties of Cu-Si liquid alloys." High Temperatures-High Pressures 49, no. 1-2 (2020): 155–71. http://dx.doi.org/10.32908/hthp.v49.845.

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The Cu-Si system is of primary interest for many industrial applications, especially for waste applications. Due to eutectic reactions and the congruent melting of intermetallic phases, these binary alloys exhibit specific behaviors as a function of temperature and composition. A complete investigation of the thermodynamic and thermophysical properties of such liquid metals that may form is required to optimize such a process at the industrial scale. To better predict the thermophysical properties of these metallic alloys, measurements of the surface tension are carried out for bulk mole fractions of up to 32%at Si. These experiments were conducted by means of the oscillating drop technique using the electromagnetic levitation method [1]. To better predict the thermodynamics of such liquids during the experiments, these tests were complemented by chemical activity calculations using the Calphad method. The experimental results obtained from the electromagnetic technique are compared and discussed taking into consideration the Egry model [2], the most suitable one in case of formation of high-temperature intermetallic compounds.

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Song, Zhi Yun, Wang Xiao, Jun Hao, Yong Zhu Cui, Li Hua Lv, and Byung Gil Min. "Kinetics and Thermodynamics of Sodium Alginate/Hydroxyapatite Composite Adsorption Fiber for Cd(II) Adsorping." Materials Science Forum 743-744 (January 2013): 578–83. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.578.

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In this study, kinetics and thermodynamics of sodium alginate/ hydroxyapatite composite adsorption fiber for adsorping Cd () were studied. The morphology and structure were characterized by SEM and IR, and the effects of pH value and bath ratio on Cd () adsorption were discussed. The model of adsorption kinetics and thermodynamics were simulated, and the parameters were calculated. The results showed that the sodium alginate/hydroxyapatite composite adsorption fiber possessed good adsorption ability towards Cd (). The optimum adsorption was found at the pH value of 6-7. High removal percent of more than 90% at low concentration and high concentration of Cd () was obtained at the bath ratio of 1:100 and 1:1000, respectively. The adsorption kinetics and thermodynamics studies showed that the pseudo-second-order model and Freundlich isotherm described the adsorption behaviors well. The thermodynamic parameters indicated that the adsorption of Cd () onto sodium alginate/hydroxyapatite composite adsorption fiber was physical and chemical sorption, endothermic in nature.

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34

Wang, Jing Yin, and Fang Liu. "Thermodynamic Properties of Soft Sedimentary Rock in Geotechnical Engineering." Applied Mechanics and Materials 170-173 (May 2012): 687–91. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.687.

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In geotechnical engineering such as supporting of deep and soft rock roadway ,oil drilling , and construction of military underground defensive facility, thermodynamic properties of soft sedimentary rock has guiding significances .The study of the thermal constitutive behavior of rock under temperature has been done for many years, and many achievement have been got on this issue. In this paper, some experimental researches on the thermo-mechanical characteristics of soft sedimentary rock have been presented. Some test results have been simulated with a thermo-elasto-viscoplastic model. The results show that the proposed thermo-elasto-viscoplastic model reflects the visco-elastoplastic properties of rock，and can describe the thermo-mechanical behaviors of soft shale rocks in not only drained conventional triaxial compression tests but also drained triaxial creep tests. So it can be used for analysis of theology and stability of rock engineering.

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35

Zhang, Dan, Jin Zhang, Shuchen Yang, Guoyou Shao, and Zhongqiu Liu. "Element Transfer Behavior for CaF2-Na2O-SiO2 Agglomerated Flux Subject in Submerged Arc Welding Process." Processes 10, no. 9 (September 14, 2022): 1847. http://dx.doi.org/10.3390/pr10091847.

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From a thermodynamic perspective, the present study has been performed to investigate the effect of SiO2 level in agglomerated fluxes on the element transfer behavior of essential elements, by applying CaF2-Na2O-SiO2 agglomerated fluxes with varying SiO2 contents. Element transfer behavior is quantified by the Δ value. The impact of SiO2 and heat input upon element transfer behavior is interpreted. Additionally, a possible thermodynamic approach to predict high basicity flux O potential and weld metal composition is proposed and evaluated. It is revealed that the consideration of the gas-slag-metal equilibrium is able to place constraints on the transfer behaviors (of O, Si, and Mn) and formation of gases. In submerged arc welding metallurgy, the empirically determined basicity index models proposed by Tuliani have been applied for more than 50 years to predict flux O potential and weld metal oxygen content. However, it is well known by welding practitioners that the flux basicity index model can only predict the changing trend of flux O potential when the flux basicity index is lower than 2.0. The present study has proposed a new thermodynamic method to identify the flux O potential for fluxes with a basicity index higher than 2.0. Additionally, the experimental evidence for the Mitra kinetic model has been provided.

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36

Doppiu, S., M. Monagheddu, G. Cocco, F. Maglia, U. Anselmi-Tamburini, and Z. A. Munir. "Mechanochemistry of the titanium–silicon system: Compositional effects." Journal of Materials Research 16, no. 5 (May 2001): 1266–79. http://dx.doi.org/10.1557/jmr.2001.0178.

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The mechanochemical behavior of the Ti–Si system was investigated across the whole composition range at a constant milling intensity. At low Si content the mechanical alloying process leads progressively to an amorphous structure. In the central range of the equilibrium diagram, crystalline intermetallic compounds form with a combustion-like behavior. A nanostructured composite of TiSi2 gradually evolves above the Ti25Si75 stoichiometry. Transformation behaviors relate to the thermodynamic and thermochemical properties of the tested mixtures as well as with their mechanical features and structural refinement, which change drastically within the explored composition range.

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37

Zhang, Yi, Wenjing Li, and Guodong Chen. "A Thermodynamic Model for Carbon Dioxide Storage in Underground Salt Caverns." Energies 15, no. 12 (June 11, 2022): 4299. http://dx.doi.org/10.3390/en15124299.

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In the context of green energy and decarbonization, carbon dioxide storage in underground facilities, such as salt caverns, is one promising technical solution that has aroused attention. However, the thermodynamic behavior of CO2 and the geomechanical response of salt cavities have not been studied comprehensively. In this study, we proposed a thermomechanical model that integrated a salt cavity and wellbore and implemented a series of simulations for carbon dioxide storage in a salt cavern. The model was verified by gas capacity calculations using field testing data. The thermodynamic behaviors of CO2 were determined and compared to methane. The results showed that the critical point coordinates of carbon dioxide were within the storage operation conditions, a phase transition could occur, and the thermodynamic properties around the critical point varied dramatically. For a short CO2 withdrawal operation, the salt cavity remained stable, while the near-wellbore area (NWA) was prone to fracture due to tensile stress concentration. Thus, we concluded that the proposed thermomechanical coupling numerical simulation method provided a comprehensive and quantitative tool for the feasibility analysis of CO2 storage in underground salt caverns.

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38

Sheehan, Daniel P. "Supradegeneracy and the Second Law of Thermodynamics." Journal of Non-Equilibrium Thermodynamics 45, no. 2 (April 26, 2020): 121–32. http://dx.doi.org/10.1515/jnet-2019-0051.

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AbstractCanonical statistical mechanics hinges on two quantities, i. e., state degeneracy and the Boltzmann factor, the latter of which usually dominates thermodynamic behaviors. A recently identified phenomenon (supradegeneracy) reverses this order of dominance and predicts effects for equilibrium that are normally associated with non-equilibrium, including population inversion and steady-state particle and energy currents. This study examines two thermodynamic paradoxes that arise from supradegeneracy and proposes laboratory experiments by which they might be resolved.

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39

Tomioka, Kiyoshi, Motomu Kanai, and Nobuo Ikota. "Theoretical Calculation-based Reproduction of Thermodynamic, Kinetic Behaviors and Cytotoxicity Azasteganes." HETEROCYCLES 42, no. 1 (1996): 43. http://dx.doi.org/10.3987/com-95-s9.

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40

Ha, Seung-Yeal, Hansol Park, Tommaso Ruggeri, and Woojoo Shim. "Emergent Behaviors of Thermodynamic Kuramoto Ensemble on a Regular Ring Lattice." Journal of Statistical Physics 181, no. 3 (July 15, 2020): 917–43. http://dx.doi.org/10.1007/s10955-020-02611-2.

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41

Zhang, Wei, Zhi Li, Long Shi, Zhicheng Li, Yan Luo, Qiong Liu, and Rui Huang. "Methyltrichlorosilane modified hydrophobic silica aerogels and their kinetic and thermodynamic behaviors." Journal of Sol-Gel Science and Technology 89, no. 2 (November 26, 2018): 448–57. http://dx.doi.org/10.1007/s10971-018-4882-9.

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42

Zavitsas, Andreas A. "Ideal thermodynamic behaviors of aqueous electrolyte solutions at very high concentrations." Chemical Physics Letters 759 (November 2020): 137941. http://dx.doi.org/10.1016/j.cplett.2020.137941.

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43

Lee, J. W., K. J. Hwang, W. G. Shim, and I. S. Moon. "Thermodynamic and Kinetic Behaviors of Trinitrotoluene Adsorption on Powdered Activated Carbons." Separation Science and Technology 41, no. 16 (December 2006): 3655–72. http://dx.doi.org/10.1080/01496390600956993.

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44

Wang, Shao Qing. "Ab Initio Lattice Dynamics and Thermodynamics of MgS and Related II-VI Semiconductors in Zincblende Structure." Materials Science Forum 561-565 (October 2007): 1907–10. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.1907.

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The lattice dynamics and thermodynamic properties of MgS and related II-VI compounds are studied by the first-principles linear-response function calculation in the framework of densityfunctional perturbation theory. The ab initio structural, mechanic and dielectric parameters of these phases are presented. From the theoretical phonon dispersion relations, the linear thermal expansion coefficient and its temperature dependence are calculated. The differences in structural and thermodynamic behaviors of these compounds are explained from their phonon dispersion characters.

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45

Zhang, Ming, De-Cheng Zou, and Rui-Hong Yue. "Reentrant Phase Transitions and Triple Points of Topological AdS Black Holes in Born-Infeld-Massive Gravity." Advances in High Energy Physics 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/3819246.

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Motivated by recent developments of black hole thermodynamics in de Rham, Gabadadze, and Tolley (dRGT) massive gravity, we study the critical behaviors of topological Anti-de Sitter (AdS) black holes in the presence of Born-Infeld nonlinear electrodynamics. Here the cosmological constant appears as a dynamical pressure of the system and its corresponding conjugate quantity is interpreted as thermodynamic volume. This shows that, besides the Van der Waals-like SBH/LBH phase transitions, the so-called reentrant phase transition (RPT) appears in four-dimensional space-time when the coupling coefficients cim2 of massive potential and Born-Infeld parameter b satisfy some certain conditions. In addition, we also find the triple critical points and the small/intermediate/large black hole phase transitions for d=5.

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46

Phan, Thanh-Hoang, Ebrahim Kadivar, Van-Tu Nguyen, Ould el Moctar, and Warn-Gyu Park. "Thermodynamic effects on single cavitation bubble dynamics under various ambient temperature conditions." Physics of Fluids 34, no. 2 (February 2022): 023318. http://dx.doi.org/10.1063/5.0076913.

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Thermodynamic characteristics and their effects on single cavitation bubble dynamics are important to elucidate the physical behaviors of cavitation phenomena. In this study, experimental and numerical methods were utilized to explore the thermodynamic effects on single cavitation bubble dynamics under various ambient temperature conditions. A series of experiments was performed to generate a single cavitation bubble at ambient temperatures between 20 and 80 °C using a laser-induced method and a high-speed camera to observe the dynamic behaviors of bubbles. By increasing the ambient temperature, a nonspherical bubble shape with a jet flow at the bubble rebound stage was observed. Next, the numerical simulation results in terms of the bubble radius and bubble shape were validated with the corresponding experimental data. Generally, the results exhibited reasonable agreement, particularly at the later collapse and rebound stages. Critical hydrodynamic and thermodynamic mechanisms over multiple oscillation stages at different ambient temperatures were analyzed. The bubble behaviors and their intensities were numerically quantified with respect to the bubble radius, collapsing time, internal pressure, internal temperature, and phase transition rate parameters. The results showed that the maximum bubble radius, first minimum bubble radius, and collapsing time increased with an increase in the ambient temperature. Nevertheless, the peak values of the internal pressure and internal temperature decreased with an increase in the ambient temperature. Generally, the bubble collapsed less violently at high temperatures than at low temperatures.

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47

Kim, Sok, Kwanghun Kim, Songhun Kwak, Hyowon Ri, and Songil Han. "An improved nonlinear constitutive model for the magneto-elastic coupling behavior of ferromagnetic materials." Journal of Applied Physics 131, no. 24 (June 28, 2022): 245106. http://dx.doi.org/10.1063/5.0093177.

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Based on the micro-domain theory, the macro-thermodynamic relationship, and the effective field theory, an improved nonlinear constitutive model is established for ferromagnetic materials. The constitutive model includes new expressions of some nonlinear functions and high-order nonlinear functions and has simple expressions for some ferromagnetic materials. Compared with the existing models, the nonlinear model established in this paper has a great improvement in the prediction accuracy of the magneto-elastic coupling behavior. In other words, it can accurately predict the complicated nonlinear behaviors of magnetostriction and magnetization under the magnetic field and applied stress. Furthermore, it can correctly describe magnetostriction with high tensile stress and low magnetic fields, the complicated magnetostriction behavior with stress and middle magnetic fields, the complicated magnetization behavior with stress and high magnetic fields, and the maximum point of magnetostriction according to applied stress for ferromagnetic materials. A detailed analysis of the complicated nonlinear behaviors for ferromagnetic materials demonstrates the high effectiveness of the presented model.

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48

Rodrigue, Kamiko Kouemeni Jean, Mahamat Saleh, Bouetou Bouetou Thomas, and Kofane Timoleon Crepin. "Thermodynamic phase transition and global stability of the regular Hayward black hole surrounded by quintessence." Modern Physics Letters A 35, no. 16 (April 16, 2020): 2050129. http://dx.doi.org/10.1142/s0217732320501291.

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In this work, we investigate the thermodynamic and the stability of the regular Hayward black hole surrounded by quintessence. Using the metric of the black hole surrounded by quintessence and the new approach of the holographic principle, we derive the expression of the Unruh–Verlinde temperature. Hawking temperature and specific heat are derived using the first law of black holes thermodynamics. Gibbs free energy is also evaluated. The behaviors of these quantities show that, the parameter of the regular Hayward black hole [Formula: see text] induces a decreasing of the Hawking temperature of the black hole, and that decrease is accentuated when increasing the magnitude of [Formula: see text] and the normalization factor related to the density of quintessence. For the lower entropies, the black hole passes from the unstable phase to the stable one by a first-order thermodynamics phase transition. When increasing the entropy, a second phase transition occurs. This new phase transition is a second-order thermodynamics phase transition and brings the black hole to unstable state. It results that, when increasing of magnitude of [Formula: see text], the phase transition points are shifted to the higher entropies. Moreover, the phenomena of phase transitions are preserved by adding the quintessence. Furthermore, when increasing the normalization factor of quintessence, the first-order transition point is shifted to higher entropies, while the second-order thermodynamics phase transition point is shifted to lower entropies.

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49

Machrafi, Hatim. "Temperature Distribution through a Nanofilm by Means of a Ballistic-Diffusive Approach." Inventions 4, no. 1 (January 3, 2019): 2. http://dx.doi.org/10.3390/inventions4010002.

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As microelectronic devices are important in many applications, their heat management needs to be improved, in order to prolong their lifetime, and to reduce the risk of damage. In nanomaterials, heat transport shows different behaviors than what can be observed at macroscopic sizes. Studying heat transport through nanofilms is a necessary tool for nanodevice thermal management. This work proposes a thermodynamic model incorporating both ballistic, introduced by non-local effects, and diffusive phonon transport. Extended thermodynamics principles are used in order to develop a constitutive equation for the ballistic behavior of heat conduction at small-length scales. Being an irreversible process, the present two-temperature model contains a one-way transition of ballistic to diffusive phonons as time proceeds. The model is compared to the classical Fourier and Cattaneo laws. These laws were not able to present the non-locality that our model shows, which is present in cases when the length scale of the material is of the same order of magnitude or smaller than the phonon mean free path, i.e., when the Knudsen number K n ≤ O ( 1 ) . Moreover, for small K n numbers, our model predicted behaviors close to that of the classical laws, with a weak temperature jump at both sides of the nanofilm. However, as K n increases, the behavior changes completely, the ballistic component becomes more important, and the temperature jump at both sides of the nanofilms becomes more pronounced. For comparison, a model using Fourier’s and Cattaneo’s laws with an effective thermal conductivity has shown, with reasonable qualitative comparison for small Knudsen numbers and large times.

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50

Elliott, Dawn M., and Lori A. Setton. "A Linear Material Model for Fiber-Induced Anisotropy of the Anulus Fibrosus." Journal of Biomechanical Engineering 122, no. 2 (October 18, 1999): 173–79. http://dx.doi.org/10.1115/1.429639.

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The anulus fibrosus (AF) is a lamellar, fibrocartilaginous component of the intervertebral disc, which exhibits highly anisotropic behaviors in tension. These behaviors arise from the material’s unique collagen structure. We have investigated the use of a linear, fiber-induced anisotropic model for the AF using a quadratic strain energy density formulation with an explicit representation of the collagen fiber populations. We have proposed a representative set of intrinsic material properties using independent datasets of the AF from the literature and appropriate thermodynamic constraints. The model was validated by comparing predictions with previous experimental data for AF behavior and its dependence on fiber angle. The model predicts that compressible effects may exist for the AF, and suggests that physical effects of the equivalent “matrix,” “fiber,” “fiber–matrix,” and “fiber–fiber,” interactions may be important contributors to the mechanical behavior of the AF. [S0148-0731(00)00802-5]

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