Abstract
In an extensive computer simulation study, the transport coefficients of the Lennard-Jones model fluid were determined with high accuracy from equilibrium molecular-dynamics simulations. In the frame of time-correlation function theory, the generalized Einstein relations were employed to evaluate the transport coefficients. This second of a series of four papers presents the results for the self-diffusion coefficient, and discusses and interprets the behavior of this transport coefficient in the fluid region of the phase diagram. The uncertainty of the self-diffusion data is estimated to be 1% in the gas region and 0.5% at high-density liquid states. With the very accurate data, even fine details in the shape of the self-diffusion isotherms are resolved, and the previously little-investigated behavior of the self-diffusion coefficient at low-density gaseous states is analyzed in detail. Finally, aspects of the mass transport mechanisms on the molecular scale are explored by an analysis of the velocity autocorrelation functions.
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Dates
Type | When |
---|---|
Created | 20 years, 9 months ago (Nov. 4, 2004, 6:08 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 6, 2024, 7:13 p.m.) |
Indexed | 1 day, 1 hour ago (Aug. 22, 2025, 12:46 a.m.) |
Issued | 20 years, 9 months ago (Nov. 15, 2004) |
Published | 20 years, 9 months ago (Nov. 15, 2004) |
Published Print | 20 years, 9 months ago (Nov. 15, 2004) |
@article{Meier_2004, title={Transport coefficients of the Lennard-Jones model fluid. II Self-diffusion}, volume={121}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1786579}, DOI={10.1063/1.1786579}, number={19}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Meier, Karsten and Laesecke, Arno and Kabelac, Stephan}, year={2004}, month=nov, pages={9526–9535} }