Tuning density profiles and mobility of inhomogeneous fluids

Abstract

Density profiles are the most common measure of inhomogeneous structure in confined fluids, but their connection to transport coefficients is poorly understood. We explore via simulation how tuning particle-wall interactions to flatten or enhance the particle layering of a model confined fluid impacts its self-diffusivity, viscosity, and entropy. Interestingly, interactions that eliminate particle layering significantly reduce confined fluid mobility, whereas those that enhance layering can have the opposite effect. Excess entropy helps to understand and predict these trends.

arXiv comment5 pages, 3 figures

References in corpus (8)

• Freezing by Heating in a Driven Mesoscopic System
• Excess entropy, Diffusivity and Structural Order in liquids with water-like anomalies
• Thermodynamics predicts how confinement modifies hard-sphere dynamics
• Colloidal glass transition observed in confinement
• Calculation of surface tension via area sampling
• Does confining the hard-sphere fluid between hard walls change its average properties?
• How short-range attractions impact the structural order, self-diffusivity, and viscosity of a fluid
• A non-equilibrium Monte Carlo approach to potential refinement in inverse problems

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