Imperial College London
Professor Andrew Parry

ProfessorAndrewParry

Faculty of Natural Sciences, Department of Mathematics

Deputy Head of Department/Professor of Statistical Physics
 
 
 
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Contact

 

+44 (0)20 7594 8537a.o.parry Website

 
 
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Location

 

6M15Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Malijevsky:2024:10.1103/PhysRevE.109.024802,
author = {Malijevsky, A and Parry, A},
doi = {10.1103/PhysRevE.109.024802},
journal = {Physical Review E: Statistical, Nonlinear, and Soft Matter Physics},
title = {Critical point wedge filling and critical point wetting},
url = {http://dx.doi.org/10.1103/PhysRevE.109.024802},
volume = {109},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - For simple fluids adsorbed at a planar solid substrate (modeled as an inert wall) it is known that critical-point wetting, that is, the vanishing of the contact angle θ at a temperature Tw lying below that of the critical point Tc, need not occur. While critical-point wetting necessarily happens when the wall-fluid and fluid-fluid forces have the same range (e.g., both are long ranged or both short ranged) nonwetting gaps appear in the surface phase diagram when there is an imbalance between the ranges of these forces. Here we show that despite this, the convergence of the lines of constant contact angle, 0<θ<π, to an ordinary surface phase transition at Tc, means that fluids adsorbed in wedges (and cones) always exhibit critical-point filling (wedge wetting or wedge drying) regardless of the range and imbalance of the forces. We illustrate the necessity of critical-point filling, even in the absence of critical-point wetting, using a microscopic model density functional theory of fluid adsorption in a right angle wedge, with dispersion and also retarded dispersionlike wall-fluid forces. The location and order of the filling phase boundaries are determined and shown to be in excellent agreement with exact thermodynamic requirements and also predictions for critical singularities based on interfacial models.
AU  - Malijevsky,A
AU  - Parry,A
DO  - 10.1103/PhysRevE.109.024802
PY  - 2024///
SN  - 1539-3755
TI  - Critical point wedge filling and critical point wetting
T2  - Physical Review E: Statistical, Nonlinear, and Soft Matter Physics
UR  - http://dx.doi.org/10.1103/PhysRevE.109.024802
UR  - http://hdl.handle.net/10044/1/109612
VL  - 109
ER  -
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