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Dynamics and Thermodynamics beyond the critical point
Sudden changes in the dynamical properties of a supercritical fluid model have been found as a function of pressure and temperature (T/T(c) = 2–5 and P/P(c) = 10–10(3)), striving with the notion of a single phase beyond the critical point established by thermodynamics. The sound propagation in the T...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3563038/ https://www.ncbi.nlm.nih.gov/pubmed/23383373 http://dx.doi.org/10.1038/srep01203 |
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author | Gorelli, F. A. Bryk, T. Krisch, M. Ruocco, G. Santoro, M. Scopigno, T. |
author_facet | Gorelli, F. A. Bryk, T. Krisch, M. Ruocco, G. Santoro, M. Scopigno, T. |
author_sort | Gorelli, F. A. |
collection | PubMed |
description | Sudden changes in the dynamical properties of a supercritical fluid model have been found as a function of pressure and temperature (T/T(c) = 2–5 and P/P(c) = 10–10(3)), striving with the notion of a single phase beyond the critical point established by thermodynamics. The sound propagation in the Terahertz frequency region reveals a sharp dynamic crossover between the gas like and the liquid like regimes along several isotherms, which involves, at sufficiently low densities, the interplay between purely acoustic waves and heat waves. Such a crossover allows one to determine a dynamic line in the phase diagram which exhibits a very tight correlation with a number of thermodynamic observables, showing that the supercritical state is remarkably more complex than thought so far. |
format | Online Article Text |
id | pubmed-3563038 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-35630382013-02-04 Dynamics and Thermodynamics beyond the critical point Gorelli, F. A. Bryk, T. Krisch, M. Ruocco, G. Santoro, M. Scopigno, T. Sci Rep Article Sudden changes in the dynamical properties of a supercritical fluid model have been found as a function of pressure and temperature (T/T(c) = 2–5 and P/P(c) = 10–10(3)), striving with the notion of a single phase beyond the critical point established by thermodynamics. The sound propagation in the Terahertz frequency region reveals a sharp dynamic crossover between the gas like and the liquid like regimes along several isotherms, which involves, at sufficiently low densities, the interplay between purely acoustic waves and heat waves. Such a crossover allows one to determine a dynamic line in the phase diagram which exhibits a very tight correlation with a number of thermodynamic observables, showing that the supercritical state is remarkably more complex than thought so far. Nature Publishing Group 2013-02-04 /pmc/articles/PMC3563038/ /pubmed/23383373 http://dx.doi.org/10.1038/srep01203 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Gorelli, F. A. Bryk, T. Krisch, M. Ruocco, G. Santoro, M. Scopigno, T. Dynamics and Thermodynamics beyond the critical point |
title | Dynamics and Thermodynamics beyond the critical point |
title_full | Dynamics and Thermodynamics beyond the critical point |
title_fullStr | Dynamics and Thermodynamics beyond the critical point |
title_full_unstemmed | Dynamics and Thermodynamics beyond the critical point |
title_short | Dynamics and Thermodynamics beyond the critical point |
title_sort | dynamics and thermodynamics beyond the critical point |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3563038/ https://www.ncbi.nlm.nih.gov/pubmed/23383373 http://dx.doi.org/10.1038/srep01203 |
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