Jones Particles at Moderately High Densities

Lennard-Jones Particles at Moderately High Densities 

Lennard-Jones (LJ) particles are supposed to closely resemble in behavior real simple spherical particles such as argon. In this section, we 

At short distances, ssLy a R 5a, in spite of the random distribution of the particles, there is a sort of order revealed by the form of the RDF. This order is often referred to as the local structure of the liquid. The local character of this structure should be stressed, since it contrasts with the long-range order typical of a perfect lattice. 

Lennard-Jones (LJ) particles are supposed to resemble closely in behavior real, simple spherical particles such as argon. In this section, we present some further information on the behavior of g(/ ) and its dependence on density and on temperature. The LJ particles are defined through their pair potential as 

FIGURE 5.6. Dependence of g R) on the density of the system. The corresponding (number) densities are indicated next to each curve. 

FIGURE 5.7. A random distribution of spheres in two dimensions. Two spherical shells of width dc with radius a and 2o- are drawn (the diameter of the spheres is cr). On the left, the center of the spherical shell coincides with the center of one particle, whereas on the right, the center of the spherical shell has been chosen at a random point. It is clearly observed that the two shells on the left are filled by centers of particles to a larger extent than the corresponding shells on the right. The average excess of particles in these shells, drawn from the center of a given particle, is manifested by the various peaks of g R). 

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Lennard-Jones particles at moderately high densities... 

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