Non-Local Equation of State: Critical Phenomena and Collective Excitations

Authors

  • L.A. Bulavin Taras Shevchenko National University of Kyiv, Physics Faculty
  • D.A. Gavryushenko Taras Shevchenko National University of Kyiv, Physics Faculty
  • V.M. Sysoev Taras Shevchenko National University of Kyiv, Physics Faculty

DOI:

https://doi.org/10.15407/ujpe66.3.240

Keywords:

equation of state, non-local properties, collective excitations

Abstract

Non-local properties of the thermal equation of state of a fluid system are observed for the wide range of changes of thermodynamic parameters. Density profiles of a fluid, which are constructed by the non-local equation of state, show that significant changes of system’s density occur in a significant part of the volume in the case of approaching the critical liquid-vapor point. The application of the non-local thermal equation of state as a closure of the equations of classical hydrodynamics allowed us to obtain the spectrum of collective excitations which is similar to the spectrum of excitations in liquid helium.

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Published

2021-04-07

How to Cite

Bulavin, L., Gavryushenko, D., & Sysoev, V. (2021). Non-Local Equation of State: Critical Phenomena and Collective Excitations. Ukrainian Journal of Physics, 66(3), 240. https://doi.org/10.15407/ujpe66.3.240

Issue

Section

Physics of liquids and liquid systems, biophysics and medical physics

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