Sticky hard spheres beyond the Percus-Yevick approximation.
Sticky hard spheres beyond the Percus-Yevick approximation.
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DOI:
10.1103/physreve.48.4599
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发表时间:
1993-12
期刊:
影响因子:
--
通讯作者:
Yuste;Santos
中科院分区:
文献类型:
--
作者:
Yuste;Santos
The radial distribution function g(r) of a sticky-hard-sphere fiuid is obtained by assuming a rational-function form for a function related to the Laplace transform of rg(r), compatible with the conditions of finite y(r) = g(r)e~i"l~ "s at contact point and finite isothermal compressibility. In a recent paper [S. Bravo Yuste and A. Santos, J. Stat. Phys. 72, 703 (1993)] we have shown that the simplest rational-function approximation, namely, the Pade approximant (2,3), leads to Baxter s exact solution of the Percus-Yevick equation. Here we consider the next approximation, i.e. , the Pade approximant (3,4), and determine the two new parameters by imposing the values of y(r) at contact point and of the isothermal compressibility. Comparison with Monte Carlo simulation results shows a significant improvement over the Percus-Yevick approximation.