NDLI: A theory of a curved vapor-liquid separation boundary: The lattice gas model

Content Provider	Springer Nature Link
Author	Tovbin, Yu. K.
Copyright Year	2010
Abstract	Molecular theory of curved vapor-liquid interphase boundaries was considered in terms of the lattice gas model. The theory uses the quasi-thermodynamic concept of curved layers of a separation boundary with a large radius. The transition from a rectangular lattice to such layers is performed by the introduction of a variable number of the nearest neighbors. The problems (1) of the transition from distributed molecular models to layer models reflecting macroscopic symmetry of the interphase boundary and (2) of a minimum linear size of the surface region to which thermodynamic approaches are applicable were considered. Equations for the quasi-equilibrium distribution of molecules at the vapor-liquid boundary in a metastable system were constructed in the quasi-chemical approximation taking into account direct correlations between the nearest interacting molecules. A metastable state is maintained by a pressure jump described by the macro-scopic Laplace equation on a separation surface inside the interphase region. Equations for local mean pressure values and normal and tangential pressure tensor components inside the interphase region were constructed. These equations were used to obtain microscopic difference mechanical equilibrium equations for curved boundaries of spherical and cylindrical drops in the metastable state. The relation between the micro-scopic difference mechanical equilibrium equations and similar differential equations and the macroscopic Laplace equation, which described pressure jump in a metastable system, was considered. Various definitions of surface tension are discussed.
Starting Page	180
Ending Page	194
Page Count	15
File Format	PDF
ISSN	00360244
Journal	Russian Journal of Physical Chemistry
Volume Number	84
Issue Number	2
e-ISSN	1531863X
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2010-01-21
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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