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Thermodynamics and phase behavior of a triangle-well model and density-dependent variety
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10.1063/1.3049399
/content/aip/journal/jcp/130/1/10.1063/1.3049399
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/1/10.1063/1.3049399

Figures

Image of FIG. 1.
FIG. 1.

for the HSTW potential with the shown potential range parameter . Circles are for molecular simulation results (Ref. 22), solid lines are for the present TPT predictions, and dashed lines are for the MCA by BH (Ref. 7(b)).

Image of FIG. 2.
FIG. 2.

The same as in Fig. 1 but for different potential range parameters as displayed.

Image of FIG. 3.
FIG. 3.

The same as in Fig. 1 but for different potential range parameters as displayed.

Image of FIG. 4.
FIG. 4.

Pressure-density curve for the HSTW fluid with . Solid lines are for the present fifth-order TPT, dashed lines are the EOS reported in Ref. 22, short dashed lines are the second-order MCA-TPT (Ref. 7(b)), and symbols are the simulation data reported in Ref. 22.

Image of FIG. 5.
FIG. 5.

Pressure-density curve for the HSTW fluid with , , and . Solid lines are for the present fifth-order TPT, short dashed lines are the EOS reported in Ref. 22, and symbols are the simulation data reported in Ref. 22.

Image of FIG. 6.
FIG. 6.

Pressure-density curve for the HSTW fluid with at several different temperatures as shown. Solid lines are for the present fifth-order TPT, dashed lines are the EOS reported in Ref. 22, closed symbols are the simulation data reported in Ref. 22, and open symbols are the simulation data reported in Ref. 26.

Image of FIG. 7.
FIG. 7.

for the HSTW potential with the shown potential range parameter and temperature . Solid symbols are for molecular simulation results (Ref. 22). Solid lines are for the present fifth-order TPT predictions. Dashed lines are for the second-order MCA-TPT (Ref. 7(b)).

Image of FIG. 8.
FIG. 8.

The same as in Fig. 7 but for different potential range parameters and temperatures .

Image of FIG. 9.
FIG. 9.

The same as in Fig. 7 but for different potential range parameters and temperatures .

Image of FIG. 10.
FIG. 10.

for the HSTW potential with the shown potential range parameter and temperature . Solid symbols are for molecular simulation results (Ref. 22). Short dashed lines are for the present fifth-order TPT predictions. Black lines are results of the EoS reported in Ref. 22, with the dashed lines as a result of only the first-order term in the expansion and solid lines resulting from including the second-order term.

Image of FIG. 11.
FIG. 11.

Vapor-liquid phase diagram of the HSTW fluid with three different values of the potential range parameter as displayed. Solid lines are for the present fifth-order TPT prediction. Dashed lines are for the prediction from the EoS (Ref. 22) based on the BH perturbation and are reproduced from Ref. 22. Symbols are for the computer simulation results from Ref. 22.

Image of FIG. 12.
FIG. 12.

Vapor-liquid phase diagram of the HSTW fluid with potential range parameter as displayed. Solid line is for the present fifth-order TPT prediction. Dotted line is for the LR-TW EoS prediction (Ref. 25). Dashed line is for the SCOZA prediction. Both the dotted line and the dashed line are reproduced from Ref. 25.

Image of FIG. 13.
FIG. 13.

Phase diagram for the HSTW fluid with . Black lines are reproduced from Ref. 22 and are for the EoS (Ref. 22) based on the BH -order perturbation theory. Short dashed lines are for the present fifth-order -order perturbation theory (Ref. 30). Dotted lines are for the model presented by Adhikari and Kofke (Ref. 8). Solid circles are for the simulation results from Ref. 8.

Image of FIG. 14.
FIG. 14.

Phase diagrams of the original HSTW potential and its density-dependence variety in the form of temperature vs density . The potential parameters are also shown in the figures.

Image of FIG. 15.
FIG. 15.

The same as in Fig. 14 but for different potential parameter combinations.

Image of FIG. 16.
FIG. 16.

The same as in Fig. 14 but for different potential parameter combinations.

Tables

Generic image for table
Table I.

Comparison of the critical temperatures and densities from different TPT versions and computer simulation for the HSTW fluid of various potential range parameters. The simulation results are taken from Refs. 22 and 25. Numbers in parentheses indicate the uncertainty on the last digit(s), i.e., 0.376(7) is .

Generic image for table
Table II.

Critical temperature and critical density for the HCAY fluid of two extremely short potential ranges marked by large values of the inverse range parameter , resulting, respectively, from simulations (Ref. 28), the present third-, fourth-, fifth-, and sixth-order TPTs and two versions (Ref. 29) of the SCOZA. is a particle number in the simulation box.

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/content/aip/journal/jcp/130/1/10.1063/1.3049399
2009-01-05
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermodynamics and phase behavior of a triangle-well model and density-dependent variety
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/1/10.1063/1.3049399
10.1063/1.3049399
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