Related Experiment Video
Updated: Jul 18, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Thermodynamic and structural properties of confined discrete-potential fluids
A L Benavides1, L A del Pino, A Gil-Villegas
1Instituto de Física, Universidad de Guanajuato, Loma del Bosque 103, Colonia Lomas del Campestre, León 37150, Mexico. alb@fisica.ugto.mx
Abstract:
The thermodynamic and structural behaviors of confined discrete-potential fluids are analyzed by computer simulations, studying in a systematic way the effects observed by varying the density, temperature, and parameters of the potentials that characterize the molecule-molecule interactions. The Gibbs ensemble simulation technique for confined fluids [A. Z. Panagiotopoulos, Mol. Phys. 62, 701 (1987)] is applied to a fluid confined between two parallel hard walls. Two different systems have been considered, both formed by spherical particles that differ by the interparticle pair potential: a square well plus square shoulder or a square shoulder plus square well interaction. These model interactions can describe in an effective way pair potentials of real molecular and colloidal systems. Results are compared with the simpler reference systems of square-shoulder and square-well fluids, both under confinement. From the adsorption characterization through the use of density profiles, it is possible to obtain specific values of the interparticle potential parameters that result in a positive to negative adsorption transition.
Related Concept Videos
Thermodynamic Potentials
Characteristics of Fluids
Characteristics of Fluids
Fluids, which include both liquids and gases, are substances that deform continuously under shearing stress. For example, water and oil are liquids with molecules that can...
Thermodynamic Properties of Ideal Solutions
Velocity Potential
Plane Potential Flows
Uniform Flow
Uniform flow...

