Original scientific paper

Non-uniform liquid in external field

L. A. Bulavin ; Department of Physics, Sub-Department of Molecular Physics, Taras Shevchenko Kiev University, 6 Glushkova St., Kiev 252127, Ukraine
D. A. Gavrushenko ; Department of Physics, Sub-Department of Molecular Physics, Taras Shevchenko Kiev University, 6 Glushkova St., Kiev 252127, Ukraine
V. M. Sysoev ; Department of Physics, Sub-Department of Molecular Physics, Taras Shevchenko Kiev University, 6 Glushkova St., Kiev 252127, Ukraine

Abstract

To calculate the density profile of a liquid in an external field, it is necessary to consider the density as a functional of the system's chemical potential, i.e. the correlation effects must be investigated. On the basis of a statistical-mechanical calculation, the authors obtained an expansion of the liquid density into a series of moments of correlation functions of different orders. The expression for the liquid density profile was obtained as a sum of local and correlation terms. The correlation term has been calculated within the Ornstein-Zernike approximation in the vicinity of the critical point. It is shown that this term decreases the total variation of density by about 10%.

Keywords

Hrčak ID:

299845

URI

https://hrcak.srce.hr/299845

Publication date:

1.6.1997.

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