Superadiabatic dynamical density functional theory for colloidal suspensions under homogeneous steady-shear

被引:2
作者
Tschopp, S. M. [1 ]
Brader, J. M. [1 ]
机构
[1] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland
关键词
NONEQUILIBRIUM STATISTICAL-MECHANICS; ACCELERATED STOKESIAN DYNAMICS; HARD-SPHERES; BROWNIAN PARTICLES; RHEOLOGY; DISPERSIONS; FLOW; INSTABILITY; LIQUID; FLUIDS;
D O I
10.1063/5.0211198
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页数:14
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