ON THE VISCOSITY OF CONCENTRATED AGGREGATED SUSPENSIONS

The Tsenoglou approach (J. Rheol. 34, 15 (1990)) to calculating the vi scosity of concentrated aggregated suspensions has been shown to be fl awed owing to a confusion between compact and fractal aggregates. The difference between these two regimes of particle aggregation has been clarified and appropriate formulas describing the viscosity of such su spensions have been derived. In addition, a generalized equation for d escribing the viscosity of hard sphere suspensions is also proposed. ( C) 1996 Academic Press, Inc.