Diffusion Coefficient and Barodiffusion Ratio of Mesoscale Fluids in Their Critical Region

Authors

  • G.V. Khrapiichuk Taras Shevchenko National University of Kyiv, Faculty of Physics
  • O.V. Chalyi O.O. Bogomolets National Medical University, Chair of Medical and Biological Physics
  • L.M. Chernenko O.O. Chuiko Institute of Surface Chemistry, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe55.9.988

Keywords:

-

Abstract

The calculation results for the dependences of the diffusion coefficient and the barodiffusion ratio on the pressure and the density in vicinity of the critical point obtained for spatially confined fluid systems are presented. The critical behavior of those kinetic properties in small volumes of fluids has been analyzed in
the fluctuation, dynamic crossover, and regular regions. Spatial dispersion effects have been taken into consideration to avoid the zero value of diffusion coefficient and the infinite value of barodiffusion ratio, when approaching the critical state. Numerical estimations that use experimental data have been made, and plots
that illustrate our theoretical calculations have been built.

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Published

2025-01-22

How to Cite

Khrapiichuk, G., Chalyi, O., & Chernenko, L. (2025). Diffusion Coefficient and Barodiffusion Ratio of Mesoscale Fluids in Their Critical Region. Ukrainian Journal of Physics, 55(9), 988. https://doi.org/10.15407/ujpe55.9.988

Issue

Vol. 55 No. 9 (2010)

Section

Soft matter

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