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Limits of structure stability of simple liquids revealed by study of relative fluctuations

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  • A. Goncharov
  • V. Melent’ev
  • E. Postnikov

Abstract

We analyse the inverse reduced fluctuations (inverse ratio of relative volume fluctuation to its value in the hypothetical case where the substance acts as an ideal gas for the same temperature-volume parameters) for simple liquids from experimental acoustic and thermophysical data along a coexistence line for both liquid and vapour phases. It has been determined that this quantity has a universal exponential character within the region close to the melting point. This behaviour satisfies the predictions of the mean-field (grand canonical ensemble) lattice fluid model and relates to the constant average structure of a fluid, i.e. redistribution of the free volume complementary to a number of vapour particles. The interconnection between experiment-based fluctuational parameters and self-diffusion characteristics is discussed. These results may suggest experimental methods for determination of self-diffusion and structural properties of real substances. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • A. Goncharov & V. Melent’ev & E. Postnikov, 2013. "Limits of structure stability of simple liquids revealed by study of relative fluctuations," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(8), pages 1-5, August.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:8:p:1-5:10.1140/epjb/e2013-40111-7
    DOI: 10.1140/epjb/e2013-40111-7
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    Cited by:

    1. Postnikov, Eugene B. & Chora̧żewski, Mirosław, 2016. "Transition in fluctuation behaviour of normal liquids under high pressures," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 449(C), pages 275-280.

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    Keywords

    Statistical and Nonlinear Physics;

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