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Transition in fluctuation behaviour of normal liquids under high pressures

Author

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  • Postnikov, Eugene B.
  • Chora̧żewski, Mirosław

Abstract

We explore the behaviour of the inverse reduced density fluctuations and the isobaric expansion coefficient using α,ω-dibromoalkanes as an example. Two different states are revealed far from the critical point: the region of exponentially decaying fluctuations near the coexistence curve and the state with longer correlations under sufficiently high pressures. The crossing of the isotherms of the isobaric expansion coefficient occurs within the PVT range of the mentioned transition. We discuss the interplay of this crossing with the changes in molecular packing structure connected with the analysed function of the density, which represents inverse reduced volume fluctuations.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:phsmap:v:449:y:2016:i:c:p:275-280
    DOI: 10.1016/j.physa.2015.12.129
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    References listed on IDEAS

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    1. T. Aste & T. Matteo, 2008. "Structural transitions in granular packs: statistical mechanics and statistical geometry investigations," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 64(3), pages 511-517, August.
    2. 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.
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