Kumar, S.
, Szamel, G.
and Douglas, J.
(2006),
Nature of the Breakdown in the Stokes-Einstein Relationship in a Hard Sphere Fluid, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852555
(Accessed March 24, 2025)
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Nature of the Breakdown in the Stokes-Einstein Relationship in a Hard Sphere Fluid
Published
Author(s)
S K. Kumar, Grzegorz Szamel,
Abstract
Molecular Dynamics simulations of high density hard sphere fluids clearly show a breakdown of the Stokes-Einstein equation (SE). This result has been conjectured to be due to the presence of mobile particles, i.e., ones which have the propensity to hop distances which are integer multiples of the interparticle distance. We conclusively show that, even though the whole liquid violates the SE equation at high densities, the sedentary particles, i.e., ones complementary to the hoppers , obey the SE relationship. These results strongly support the notion that the unusual dynamics of fluids near vitrification are caused exclusively by the presence of these hoppers.Citation
Journal of Chemical Physics
Volume
124
Pub Type
Journals
Download Paper
Keywords
hard spheres, hopping, molecular dynamics, Stokes-Einstein relation
Citation
Issues
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Created May 31, 2006, Updated October 12, 2021