Title page for ETD etd-06062008-165017
|Type of Document
||Gregory, Victor Paul
||Monte Carlo computer simulation of the Lennard-Jones and Stockmayer fluid phase diagrams
|Schug, John C.
|Field, Paul E.
|Marand, Hervé L.
|Schick, G. Alan
|Williams, Clayton D.
|Date of Defense
The isotherms of the Lennard-Jones fluid and the Stockmayer fluid are calculated by
Monte Carlo computer simulation using the constant NpT ensemble. Empirical
coefficients are determined for a truncated virial equation of state fitted to our data.
Spinodal points are located for each temperature and fluid. For temperatures less than 0.90
of the critical temperature, we succeeded in temporarily isolating clusters during the gas to
liquid transition for the LJ fluid. Density profiles are calculated for clusters at and above
the spinodal pressures. The clusters above the spinodal pressure have liquid-like densities
at their centers and are identified as critical condensation clusters. The clusters at the
spinodal increase in size with temperature and have densities roughly half as dense as the
equilibrium liquid at their centers. It is found that the results are essentially system size
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