Three types of condensation in open wedges
arXiv:2505.02100 · doi:10.1103/PhysRevE.111.045507
Abstract
Condensation in linear wedges formed by semi-infinite walls is a well-established critical phenomenon characterized by the continuous growth of an adsorbed liquid layer as bulk two-phase coexistence is approached. In this study, we investigate condensation in finite-length wedges open at both ends, demonstrating that the process becomes first-order. The open boundaries and finite geometry induce a remarkably rich phase behavior of the confined fluid, exhibiting three distinct types of condensation, reentrant phenomena, and continuous higher-order transitions between condensation states. Through a detailed macroscopic analysis, we derive the conditions for each type of condensation, classify the global phase diagrams, and explore asymptotic behavior in specific limiting cases. The asymptotic predictions are confirmed by a detailed comparison with the numerical solutions of the governing equations.
References in corpus (10)
- Filling transition for a wedge
- Universality for 2D Wedge Wetting
- Morphological phase transitions of thin fluid films on chemically structured substrates
- Phase diagram for morphological transitions of wetting films on chemically structured substrates
- Phase separation in a wedge. Exact results
- Filling transitions in acute and open wedges
- Density functional study of complete, first-order and critical wedge filling transitions
- Edge contact angle and modified Kelvin equation for condensation in open pores
- Bridging of liquid drops at chemically structured walls
- Capillary condensation between non-parallel walls