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Author Zwick, S. A.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher American Institute of Physics (AIP)
Language English
Subject Keyword CHEMISTRY ♦ BOLTZMANN STATISTICS ♦ DISTRIBUTION ♦ EVAPORATION ♦ LIQUIDS ♦ MAXWELL DISTRIBUTION ♦ MOLECULES ♦ PRESSURE ♦ SURFACES ♦ THERMODYNAMICS ♦ VAPORS ♦ VELOCITY
Abstract A simple kinetic model is employed to investigate nonequilibrium evaporation from a liquid. Molecules are assumed to evaporate into a (one-sided) Maxwellian velocity distribution at the liquid surface. Molecules reaching the surface from the vaper are assumed to form part of an ellipsoidal velocity distribution. Of the molecules approaching the liquid at the interface only the fraction alpha condenses there; the remainder presumably undergoes specular reflection back into the vapor. By equating physical conditions at the surface with conditions in the vapor, the vapor pressure can be related to that which would prevail at equilibrium, as a function of the surface accommodation coefficient alpha and the mean velocity u of the vapor relative to the interface.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1960-01-01
Publisher Department Univ. of California, Livermore
Journal Journal of Applied Physics
Volume Number 31
Issue Number 10
Organization Univ. of California, Livermore


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