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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...

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Autores principales: Gorelli, F. A., Bryk, T., Krisch, M., Ruocco, G., Santoro, M., Scopigno, T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
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.
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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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