Speed of sound from fundamental physical constants

Trachenko, Kostya; Monserrat, Bartomeu; Pickard, Chris J.; Бражкин, В. В.

doi:10.1126/sciadv.abc8662

Cited by 47 publications

(47 citation statements)

References 33 publications

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“…Besides the intrinsic information, unfortunately presently not supported by experimental confirmation, all the attained expressions and limits are internally consistent with the model, and with other limits provided on different basis. Having found limiting values for these quantities stimulates our reasoning on the fact that other Authors [51][52][53][54][55] have identified limiting values albeit for different physical quantities. However an answer to such comparison is still premature, although not absurd in principle.…”

Section: Further Discussion and Conclusionmentioning

confidence: 62%

Isochoric Specific Heat in the Dual Model of Liquids

Peluso¹

2021

Preprint

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We continue in this paper to illustrate the implications of the Dual Model of Liquids (DML) by deriving the expression for the isochoric specific heat as function of the collective degrees of freedom available at a given temperature and analyzing its dependence on temperature. Two main tasks will be accomplished. First, we show that the expression obtained for the isochoric specific heat in the DML is in line with the experimental results. Second, the expression will be compared with the analogous one obtained in another theoretical dual model of the liquid state, the Phonon Theory of Liquid Thermodynamics. This comparison will allow to get interesting insights about the number of collective degrees of freedom available in a liquid and on the value of the isobaric thermal expansion coefficient, two quantities that are related to each other in this framework.

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Section: Further Discussion and Conclusionmentioning

confidence: 62%

Isochoric Specific Heat in the Dual Model of Liquids

Peluso¹

2021

Preprint

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“…Trachenko and co-workers then started from the kinetic expression and argued that the fundamental limit is the UV cut off, i.e., the minimum wavelength is limited by the atomic size. They made similar arguments for viscosity and speed of sound [114,115]. Through scaling of the interatomic distance to the Bohr radius and interatomic energy to the Ryderberg energy, they related the minimum values of thermal diffusivity and viscosity to fundamental physical constants…”

Section: Thermal Conductivity Of Liquids: Modeling and Simulation App...mentioning

confidence: 94%

Perspectives on Molecular-Level Understanding of Thermophysics of Liquids and Future Research Directions

Chen

2021

Journal of Heat Transfer

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This article provides the author's perspectives on the current molecular-level understanding of thermophysical properties and transport processes in liquids. After illustrating peculiarities of the thermophysical properties of some common liquids using experimental data on their specific heat, thermal conductivity and viscosity, the article moves on with a summary of existing molecular pictures and theoretical approaches on liquids, followed with elaborations on different models developed for the specific heat, thermal conductivity, and viscosity. The review shows that current understanding of thermophysical properties of liquids is still poor and theoretical tools to study them are not well developed. The article provides personal views of the author on what are missing in current theories and underlying mechanisms for some experimental observations, and includes some suggestions for potential directions of future research.

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“…Besides the intrinsic information, unfortunately presently not supported by experimental confirmation, all the attained expressions and limits are internally consistent with the model, and with other limits provided on different basis. Having found limiting values for these quantities stimulates our reasoning on the fact that other Authors[36][37][38][39][40] have identified limiting values albeit for different physical quantities. However an answer to such comparison is still premature, although not absurd in principle.…”

mentioning

confidence: 67%

Isochoric specific heat in the Dual Model of Liquids and comparison with the Phonon theory of Liquid Thermodynamics

Peluso

2021

Preprint

View full text Add to dashboard Cite

We continue in this paper to illustrate the implications of the Dual Model of Liquids (DML) by deriving the expression for the isochoric specific heat as a function of the collective degrees of freedom available at a given temperature and comparing it with the analogous expression obtained in the Phonon Theory of Liquid Thermodynamics. The Dual Model of Liquids has been recently proposed as a model describing the dynamics of liquids at the mesoscopic level. Bringing together the early pictures of Brillouin and Frenkel and the recent experimental outcomes obtained by means of high energy scattering, liquids are considered in the DML as constituted by a population of wave packets, responsible for the propagation of elastic and thermal perturbations, and of dynamic aggregates of molecules, in continuous re-arrangement, diving in an ocean of amorphous, disordered liquid. The collective degrees of freedom contribute to the exchange of energy and momentum between the material particles and the lattice particles, which the liquids are supposed to be composed of in the DML.First, we show that the expression obtained for the specific heat in the DML is in line with the experimental results. Second, its comparison with that of the Phonon Theory of Liquid Thermodynamics allows getting interesting insights about the limiting values of the collective degrees of freedom and on that of the isobaric thermal expansion coefficient, two quantities that appear related to each other in this framework

show abstract

Speed of sound from fundamental physical constants

Cited by 47 publications

References 33 publications

Isochoric Specific Heat in the Dual Model of Liquids

Isochoric Specific Heat in the Dual Model of Liquids

Perspectives on Molecular-Level Understanding of Thermophysics of Liquids and Future Research Directions

Isochoric specific heat in the Dual Model of Liquids and comparison with the Phonon theory of Liquid Thermodynamics

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