
220 Perturbation Theories for Fluids and Solids
0
10
20
30
40
0.1 0.3 0.5 0.7
PSC
= 2
0
5
10
15
0.0 0.1 0.2 0.3 0.4 0.5
Z
= 2
= 3
OSC
0
10
20
30
40
50
60
0.1 0.3 0.5
γ
γ
γ
0.7
PER
= 2
0
10
20
30
κ
κ
40
50
0.1 0.3 0.5 0.7
Z
OER
= 1/2
ηη
ηη
FIGURE 8.2 Compressibility factor Z for several HCB fluids (see Figure 8.1 for descriptions)
as a function of the packing fraction η. Points: simulation data from Veerman and Frenkel
(1990), Kadlec et al. (2000), and Frenkel and Mulder (1985), for PSC, OSC, and PER-OER,
respectively. Dashed curves: SPT equation (8.18). Continuous curves: ISPT equation (8.21).
apart from the second one for HCB fluids, which is given exactly by
B
∗
2
= 1 + 3α (8.23)
in units ...