The Stokes-Einstein relation, relating the self-diffusion coefficient D to the shear viscosity η (D = kBT/2πησ), is tested for two-and three-dimensional fluids. The influence of attractive potential and temperature on the validity of the Stokes-Einstein relation by employing square-well potential is analyzed. A breakdown of the Stokes-Einstein relation is observed at low temperatures for three-dimensional fluid by using the Nigra and Evans11 model and with that obtained from the velocity autocorrelation function10 and for twodimensional fluids by using the Garcia-Rojo et al.12 model for hard discs. © 2009 American Chemical Society.
Stokes-Einstein relation in two-and three-dimensional fluids
Srivastava R.Primo
Writing – Original Draft Preparation
;
2009-01-01
Abstract
The Stokes-Einstein relation, relating the self-diffusion coefficient D to the shear viscosity η (D = kBT/2πησ), is tested for two-and three-dimensional fluids. The influence of attractive potential and temperature on the validity of the Stokes-Einstein relation by employing square-well potential is analyzed. A breakdown of the Stokes-Einstein relation is observed at low temperatures for three-dimensional fluid by using the Nigra and Evans11 model and with that obtained from the velocity autocorrelation function10 and for twodimensional fluids by using the Garcia-Rojo et al.12 model for hard discs. © 2009 American Chemical Society.| File | Dimensione | Formato | |
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