Pathway to surface-induced phase transition of a confined fluid

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Volumn 56, Issue 6, 1997, Pages R6283-R6286

  Lum, Ka ^a   Luzar, Alenka ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000808384     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.56.R6283     Document Type: Article

References (31)

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20. Note that at large length scales, evaporation of a fluid confined between two drying walls is mathematically isomorphic to the condensation of a vapor between two wetting walls. In the latter case, the phenomenon is known as “capillary condensation.” Extensive discussions on the topic as applied to lattice-gas models are found in the reviews by A. O. Parry and R. Evans [Physica A 181, 250 (1992)].PHYADX
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22. (Formula presented), (Formula presented), (Formula presented) nm. These values are correspond to the surface tension, (Formula presented) for water at (Formula presented)=298 K: γ=70 mN/m, (Formula presented) Pa(Formula presented). Chemical potential at coexistence, (Formula presented), and (Formula presented) is determined by the pressure: (Formula presented), with (Formula presented) Pa, (Formula presented)
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24. For our system (Formula presented) and (Formula presented), Eq. (1) predicts evaporation for (Formula presented).
25. X-ray scattering results suggest that capillary waves with wavelengths as small as 40 nm contribute to the roughness of pure water-vapor interface [D. K. Schwartz et al., Phys. Rev. A 41, 5687 (1990)].PLRAAN
26. To deal with chemical inhomogeneity characteristic for real systems (interference fringe patterns, measuring refractive index on 0.1 nm distance, do not reveal a dry surface, because (Formula presented) the above simulations were repeated for some representatives of nonuniform hydrophobic surfaces, by randomly distributing hydrophilic patches (with patch size (Formula presented) in units of lattice spacing; (Formula presented) on the patches was 1.01 (Formula presented) on drying surfaces. As expected, hydrophilic patches lengthened the time for the evaporation to occur, because the pinning fields (attractive sites) quench the long wavelength fluctuations.
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