English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We study the gas-liquid phase diagram and the crossover behavior of a simplemodel of ionic fluid: an equimolar binary mixture of equisized hard spheresinteracting through screened Coulomb potentials which are repulsive betweenparticles of the same species and attractive between particles of differentspecies. Using our previous results, we obtain explicit expressions for therelevant coefficients of the effective $\varphi^{4}$ Ginzburg-LandauHamiltonian in a one-loop approximation. Within the framework of thisapproximation, we calculate the critical parameters and gas-liquid coexistencecurves for different values of the dimensionless inverse screening length $z$.The critical temperature scaled by the Yukawa potential contact value as wellas the critical packing fraction rapidly decrease with an increase of theinteraction range and then for $z<0.05$ slowly approach the values found for apurely ionic model, i.e., a restricted primitive model (RPM). The both trendsare qualitatively consistent with the results of Monte Carlo simulations. Wefind that gas-liquid coexistence region reduces with an increase of $z$ andcompletely vanishes at $z\simeq 2.781$. This qualitatively agrees with theresults of Monte Carlo simulations indicating a stable gas-liquid coexistencefor $z\leq 4$. It is also shown that an increase in the interaction range fromthe one typical of simple fluids to the one typical of ionic fluids leads to adecrease of the crossover temperature. For $z\simeq 0.01$, the crossovertemperature is the same as for the RPM. For $z\simeq 2.781$, our resultsindicate a tricritical point.

Gas-liquid phase coexistence and crossover behavior of binary ionic fluids with screened Coulomb interactions: The effect of an interaction range