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FIZIKA A 6 (1997) 2, 89-96
NON-UNIFORM LIQUID IN EXTERNAL FIELDL. A. BULAVIN, D. A. GAVRUSHENKO and V. M. SYSOEV Department of Physics, Sub-Department of Molecular Physics, Taras Shevchenko Kiev University, 6 Glushkova St., Kiev 252127, Ukraine Received 27 November 1996To 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%. UDC 532, 536.71
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Copyright by The Croatian Physical Society
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