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Critical behavior of the Lennard-Jones fluid in the Percus-Yevick approximation

1985; American Institute of Physics; Volume: 31; Issue: 1 Linguagem: Inglês

10.1103/physreva.31.511

0556-2791

F. Gallerani, G. Lo Vecchio, L. Reatto,

Theoretical and Computational Physics

We study the correlations and the isothermal compressibility of the Lennard-Jones fluid in the Percus-Yevick approximation in the critical region. The equation is solved numerically and the critical behavior is found similar to that for short-range forces: classical exponents but a nonclassical and nonuniversal scaling function that leads to an asymmetry between liquid and vapor with a true spinodal present only on the high-density side of the critical density.