Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
92 (1990), S. 1275-1284
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Molecular dynamics calculations are reported on dense hard sphere fluids at three packing fractions (η=0.30,0.40,0.48). Attention is directed to the analysis of correlated recollisions of pairs of particles. The short time dynamics [t(approximately-equal-to)0(τc) where τc=1/collision frequency] is governed by correlated backscattering collisions as evidenced by persistence of vector time correlations. For longer times a crossover takes place from the correlated backscattering regime (or geminate recombination) to the diffusive-like regime (nongeminate recombination) in which vector correlations decay faster than scalar correlations. Recollisional events are categorized as first recollisions, second recollisions, and all recollisions. The resulting correlation functions exhibit different evolutionary time scales. Contributions to the time correlation functions (tcfs) from collision sequences involving three and four particles are also separated and analyzed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.458137
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