Journal of Statistical Physics

, Volume 49, Issue 1–2, pp 319–330 | Cite as

How thick is a liquid-vapor interface?

  • D. L. Heath
  • J. K. Percus


The structure of the interface of an argonlike fluid in equilibrium with its vapor near the triple point is studied using Monte Carlo simulation. By referring particle coordinates to the capillary waves and calculating the transverse structure factor in that reference frame, one can determine the penetration depth of the capillary waves into the bulk as a function of the wave vector. The penetration depth of the lowest capillary mode is consistent with the interfacial thickness as determined from the intrinsic density profile, and the data for the higher modes suggest that the penetration depth might be independent ofk.

Key words

Phase coexistence fluid interface capillary waves intrinsic profile wave penetration computer simulation 


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Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • D. L. Heath
    • 1
    • 2
  • J. K. Percus
    • 3
  1. 1.Department of PhysicsNew York UniversityNew York
  2. 2.Department of Chemical EngineeringUniversity of VirginiaCharlottesville
  3. 3.Courant Institute of Mathematical Sciences and Department of PhysicsNew York UniversityNew York

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