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Название: Solution of Ornstein-Zernike equation for wall-particle distribution function
Авторы: L. Blum, G. Stell
The Ornstein-Zernike (OZ) equation is considered for the wall-particle distribution functiong 0(x) in the case of a flat, impenetrable wall atx = 0 and a fluid of hard-core particles whose centers are constrained by the wall to occupy the semiinfinite spacex >/2, where is the particle diameter. A solution is given in terms of the wall-particle direct correlation function c0(x) forx >/2, the bulk-fluid direct correlation function cB (t), and pB, the average bulk density. Explicit formulas for the contact surface density, total excess surface density, and the Laplace transform of the fluid density near the wall are given. For mean spherical type approximations, c0 (x) forx >/2 and cB (t) are both prescribed functions; for this case, a closed-form solution is obtained. An example is discussed and additional equations that enable one to go beyond the approximations considered above are introduced.