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Ionic fluids: charge and density correlations near gas-liquid criticality

Oksana Patsahan·Ihor Mryglod·Jean-Michel Caillol
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Abstract

The correlation functions of an ionic fluid with charge and size asymmetry are studied within the framework of the random phase approximation. The results obtained for the charge-charge correlation function demonstrate that the second-moment Stillinger-Lovett (SL) rule is satisfied away from the gas-liquid critical point (CP) but not, in general, at the CP. However in the special case of a model without size assymetry the SL rules are satisfied even at the CP. The expressions for the density-density and charge-density correlation functions valid far and close to the CP are obtained explicitely.

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Oksana Patsahan, Ihor Mryglod, Jean-Michel Caillol. 2005-06-12. Ionic fluids: charge and density correlations near gas-liquid criticality. https://doi.org/10.1088/0953-8984%2F17%2F25%2Fl02

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