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Molecular dynamics simulations of the penetration lengths: application within the fluctuation theory for diffusion coefficients

Author

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  • Galliero, Guillaume
  • Medvedev, Oleg O.
  • Shapiro, Alexander A.

Abstract

Mutual diffusion in condensed phases is a theoretically and practically important subject of active research. One of the most rigorous and theoretically advanced approaches to the problem is a recently developed approach based on the concept of penetration lengths (Physica A 320 (2003) 211; Physica A 322 (2004) 151). In the current study, a fast molecular dynamics scheme has been developed to determine the values of the penetration lengths in Lennard–Jones binary systems. Results deduced from computations provide a new insight into the concept of penetration lengths. It is shown for four different binary liquid mixtures of non-polar components that computed penetration lengths, for various temperatures and compositions, are consistent with those deduced from experiments in the framework of the formalism of the fluctuation theory. Moreover, the mutual diffusion coefficients obtained from a coupled fluctuation theory and molecular dynamics scheme exhibit consistent trends and average deviations from experimental data around 10–20%.

Suggested Citation

  • Galliero, Guillaume & Medvedev, Oleg O. & Shapiro, Alexander A., 2005. "Molecular dynamics simulations of the penetration lengths: application within the fluctuation theory for diffusion coefficients," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 350(2), pages 315-337.
    • Handle: RePEc:eee:phsmap:v:350:y:2005:i:2:p:315-337
    DOI: 10.1016/j.physa.2004.11.011
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    1. Buijs, R. & Sluijs, E. M. & Verhaak, P. F. M., 1984. "Byrne and Long: A classification for rating the interview style of doctors," Social Science & Medicine, Elsevier, vol. 19(7), pages 683-690, January.
    2. Hutchinson, Bertram, 1973. "Social Status in Dublin: Marriage, Mobility and First Employment," Research Series, Economic and Social Research Institute (ESRI), number GRS67.
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