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Terraced spreading of simple liquids on solid surfacesWe have studied the spreading of liquid drops on a solid surface by molecular-dynamics simulations of coexisting three-phase Lennard-Jones systems of liquid, vapor, and solid. We consider both spherically symmetric atoms and diatomic molecules, and a range of interaction strengths. As the attraction between liquid and solid increases we observe a smooth transition in spreading regimes, from partial to complete to terraced wetting. In the terraced case, where distinct monomolecular layers spread with different velocities, the layers are ordered but not solid, with substantial molecular diffusion both within and between layers. The quantitative behavior resembles recent experimental findings, but the detailed dynamics differ. In particular, the layers exhibit an unusual spreading law, where their radii vary in time as R-squared approximately equal to log10t, which disagrees with experiments on polymeric liquids as well as recent calculations.
Document ID
19930037697
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yang, Ju-Xing
(NASA Headquarters Washington, DC United States)
Koplik, Joel
(City Collge New York, United States)
Banavar, Jayanth R.
(Pennsylvania State Univ. University Park, United States)
Date Acquired
August 16, 2013
Publication Date
December 15, 1992
Publication Information
Publication: Physical Review A
Volume: 46
Issue: 12
ISSN: 1050-2947
Subject Category
Thermodynamics And Statistical Physics
Accession Number
93A21694
Distribution Limits
Public
Copyright
Other

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