Rheology and dynamics of colloidal suspensions

BANCHIO, A. J.; BERGENHOLTZ, J.; NÄGELE, G.

PHYSICAL REVIEW LETTERS

Año: 1999 vol. 82 p. 1792 - 1792

0031-9007

Predictions from a recently developed mode coupling theory (MCT) are compared with experimentalresults for hard-sphere suspensions. A simple scaling of the MCT results leads to good agreementwith the data. The scaled MCT predicts that for hard-sphere suspensions the zero-shear limitingviscosity obeys a generalized Stokes-Einstein (GSE) relation with both the long-time self-diffusioncoefficient and the long-time collective diffusion coefficient measured at the peak of the structure factor.MCT suggests that the same GSE relations do not hold for salt-free charge-stabilized suspensions.