Entropy and fluid-fluid separation in nonadditive hard-sphere mixtures

Article Abstract:

A study was conducted to analyze the equilibrium characteristics of a two-component mixture of equal-sized, nonadditive hard spheres supporting an interspecies collision diameter bigger than that of each component. A system of 4000 particles were simulated to determine the thermodynamics and structural characteristics. Results indicated that decreases in the fraction of larger particles correlated with increases in changes associated with the residual multiparticle entropy.

Fluid dynamics, Particles, Particulate matter

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Virial coefficients and demixing of athermal nonadditive mixtures

Article Abstract:

The fourth virial coefficient of a binary nonadditive, hard-sphere mixture is computed over a wide range of deviations from diameter additivity and size ratios. It is found that in a regime of moderately negative nonadditivity and largely asymmetric diameters, relevant to the modeling of sterically and electrostatically stabilized colloidal mixtures, the fluid-fluid critical point is unstable with respect to crystallization.

Analysis, Crystallization, Colloid chemistry, Electrostatic apparatus and appliances, Electrostatic devices

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Smectic ordering of parallel hard spherocylinders: An entropy-based Monte Carlo study

Article Abstract:

The nematic to smectic transition undergone by parallel hard spherocylinders in the framework provided by the residual multiparticle entropy (RMPE) formalism is investigated. The analysis confirms the flexibility of the RMPE approach as a practical and reliable tool for detecting the formation of mesophases in model liquid crystals.

Electronic components, not elsewhere classified, Other Electronic Component Manufacturing, Liquid Crystals, Monte Carlo method, Monte Carlo methods, Entropy (Physics), Entropy (Thermodynamics), Chemical properties

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