Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
115 (2001), S. 6653-6662
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
An integral equation for rigid-body molecules with respect to site-density distribution function under arbitrary external fields is derived by the density-functional theory. Using a grand canonical partition function of molecular systems, we extend original Percus' idea to molecular fluids. The extended Percus' idea provides a relation between the site–site pair distribution function and site–density distribution function under an external field composed of the site–site interaction potentials of a molecule fixed at the origin. The site–density integral equation combined with the extended Percus' relation to molecular fluids gives a closure relation of reference interaction site model equation. The site–site pair distribution functions of homonuclear diatomic Lennard-Jones fluids obtained by the integral equation agree well with those of Monte Carlo simulation. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1401824
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