A plausible interpretation of the density scaling of the diffusivity in viscous liquids

Details A plausible interpretation of the density scaling of the diffusivity in viscous liquids A plausible interpretation of the density scaling of the diffusivity in viscous liquids

2010-06-10

arxiv.org/abs/1006.1969v3

Physics

Condensed Matter

Soft Condensed Matter

Journal of Non-Crystalline Solids (accepted for publication)[Proceedings of the 6th IDMRCS, Rome 2009]

Scientific paper

10.1016/j.jnoncrysol.2010.07.045

Fundamental thermodynamic concepts and an earlier elastic solid-state point defect model are employed to formulate an analytical second-order olynomial function describing the density scaling of the diffusion coefficient in viscous liquids. The scaling exponent is correlated, within the approximations made in the present approach, with the pressure derivative of the isothermal bulk modulus. Our findings are compared with computer simulation results.

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