Title: Effect of gravity and confinement on phase equilibria
Authors: Rogiers, Joseph ×
Indekeu, Joseph #
Issue Date: Oct-1993
Publisher: Editions de Physique
Series Title: Europhysics Letters vol:24 issue:1 pages:21-27
Abstract: We study a fluid or Ising lattice gas confined between two horizontal walls with separation L, in a gravitational field of strength g. For identical walls (with equal surface fields h1 = h(L)) the familiar capillary condensation and capillary criticality extend to non-zero g. Finite-size scaling predicts that the locus of criticality shrinks to g = 0 for L --> infinity, in the manner g is-proportional-to L-(betadelta/nu + 1). For opposing walls (with h1 = - h(L)) we confirm that the bulk two-phase coexistence is suppressed, for g = 0, to below the wetting temperature T(W). However, for small g the bulk two-phase coexistence extends to higher temperatures that increase extremely rapidly with g, up to a maximum temperature that is shifted from the L = infinity bulk critical point in the manner T(c, max)(L) - T(c)(infinity) is-proportional-to L-1/nu, conform with finite-size scaling.
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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