کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9778176 1510573 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Excess entropy scaling for transport coefficients: diffusion and viscosity in liquid metals
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Excess entropy scaling for transport coefficients: diffusion and viscosity in liquid metals
چکیده انگلیسی
A semi-empirical universal relationship proposed by Rosenfeld for dimensionless transport coefficients in dense fluids, and a universal scaling law proposed by Dzugutov for atomic diffusion in liquids, are tested for diverse liquid metals using molecular dynamics simulations. Interatomic potentials derived from the glue potential and second-moment approximation of tight-binding scheme are used to study liquid metals; the angular dependent Tersoff potential and Stillinger-Weber potential are used to investigate Si. Our simulation results give sound support to the above-mentioned universal scaling laws. Following Dzugutov, we have also arrived at a universal scaling relationship between the viscosity coefficient and excess entropy. The simulation results suggest that there approximately exists an exponent correlation between the reduced transport coefficients and the corresponding packing density.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 10–11, 15 April 2005, Pages 946-950
نویسندگان
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