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A coarse-grained explicit solvent simulation of rheology of colloidal suspensions
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10.1063/1.1860557
/content/aip/journal/jcp/122/10/10.1063/1.1860557
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/10/10.1063/1.1860557
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Equilibrium particle-solvent and particle-particle pair correlation functions.

Image of FIG. 2.
FIG. 2.

(a) Equilibrium mean-squared displacements of colloidal particles as a function of time for different volume fractions of colloids . Asymptotes corresponding to the short-time and long-time motions are indicated. (b) Non-Gaussian parameter quantifying the heterogeneous dynamics in glassy regimes.

Image of FIG. 3.
FIG. 3.

(a) Colloid particle diffusion coefficient vs volume fraction of colloid particles ; (b) diffusion coefficient normalized by its value, as a function of the normalized volume fraction (see text). Closed diamonds are our simulation results and the line is drawn as a guide to the eye. Open squares and circles are experimental data from van Megen (Refs. 32, 30, and 34) and van Blaaderen et al. (Ref. 35), respectively. Open triangles are from the BD simulation data of Cichoki (Ref. 33) and Tokuyama (Ref. 36). Closed triangles are determined by scaling method with (Ref. 26).

Image of FIG. 4.
FIG. 4.

(a) Zero-shear viscosities (closed circles) and the fit of equation (20) with ; (b) comparison of simulation results with experimental (Refs. 18 and 50) Brownian dynamics [BD1 refers to results of Strating, (Ref. 49) while BD2 refers to results of Foss and Brady (Ref. 40)] and Stokesian dynamics results (Ref. 41).

Image of FIG. 5.
FIG. 5.

(a) Shear viscosities of different suspensions as a function of the Peclet number. Lines are meant as a guide to the eye; (b) comparison of the results of the DPD model with corresponding Stokesian dynamics (SD) results of Brady. Displayed are the normalized volume fractions, defined as for our results and for the SD results.

Image of FIG. 6.
FIG. 6.

(a) Fit of our numerical results to the functional form, Eq. (21). Inset displays the fit of the SD results of Brady to the same functional form. (b) Normalized fitting parameters as a function of the Peclet numbers. Closed circles represent our results, while open squares correspond to the Stokesian dynamics results (Ref. 41).

Image of FIG. 7.
FIG. 7.

(a) Shear viscosity of glassy suspensions as a function of the Peclet numbers; (b) stress in glassy suspensions as a function of the Peclet numbers. Inset is adapted from Fuchs and Cates (Ref. 55) and displays their prediction for the same quantity.

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/content/aip/journal/jcp/122/10/10.1063/1.1860557
2005-03-11
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A coarse-grained explicit solvent simulation of rheology of colloidal suspensions
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/10/10.1063/1.1860557
10.1063/1.1860557
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