1. Superadiabatic dynamical density functional theory for colloidal suspensions under homogeneous steady-shear.
- Author
-
Tschopp, S. M. and Brader, J. M.
- Subjects
- *
COLLOIDAL suspensions , *DENSITY functional theory , *COLLOIDS , *DISTRIBUTION (Probability theory) , *VISCOSITY , *RHEOLOGY - Abstract
The superadiabatic dynamical density functional theory (superadiabatic-DDFT) is a promising new method for the study of colloidal systems out-of-equilibrium. Within this approach, the viscous forces arising from interparticle interactions are accounted for in a natural way by explicitly treating the dynamics of the two-body correlations. For bulk systems subject to spatially homogeneous shear, we use the superadiabatic-DDFT framework to calculate the steady-state pair distribution function and the corresponding viscosity for low values of the shear-rate. We then consider a variant of the central approximation underlying this superadiabatic theory and obtain an inhomogeneous generalization of a rheological bulk theory due to Russel and Gast. This paper thus establishes for the first time a connection between DDFT approaches, formulated to treat inhomogeneous systems, and existing work addressing nonequilibrium microstructure and rheology in bulk colloidal suspensions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF