Thermal diffusion behavior of hard-sphere suspensions

Short-time diffusion in concentrated bidisperse hard-sphere suspensions.

Diffusion in bidisperse Brownian hard-sphere suspensions is studied by Stokesian Dynamics (SD) computer simulations and a semi-analytical theoretical scheme for colloidal short-time dynamics, based on Beenakker and Mazur's method [Physica A 120, 388-410 (1983); 126, 349-370 (1984)]. Two species of hard spheres are suspended in an overdamped viscous solvent that mediates the salient hydrodynamic...

Dynamics of hard-sphere suspensions.

Even hard-sphere colloidal suspensions display Fickian yet non-Gaussian diffusion.

We scrutinize three decades of probability density displacement distribution in a simple colloidal suspension with hard-sphere interactions. In this index-matched and density-matched solvent, fluorescent tracer nanoparticles diffuse among matrix particles that are eight times larger, at concentrations from dilute to concentrated, over times up to when the tracer diffuses a few times its size. D...

Three-particle contribution to sedimentation and collective diffusion in hard-sphere suspensions

The virial expansion of the collective mobility ~sedimentation! coefficient is considered for hard sphere suspensions at equilibrium. The term of the second order in volume fraction, which involves three-particle hydrodynamic interactions, is calculated with high accuracy. To achieve that we represent the collective mobility coefficient as the sum of convergent integrals over particle configura...

High-frequency effective viscosity of hard-sphere suspensions.

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