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Colloid-colloid and colloid-wall interactions in driven suspensions
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10.1063/1.2753481
/content/aip/journal/jcp/127/3/10.1063/1.2753481
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/3/10.1063/1.2753481
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The two-colloid system (a) and the colloid-wall system (b). The colloids are driven with velocity . The gray areas and are forbidden for the center of the solute particles, and the dashed lines represent their surfaces .

Image of FIG. 2.
FIG. 2.

Contour plots of the stationary density of solute particles near two driven colloids for and . Bright areas correspond to high densities and dark areas to low densities. In (a) the colloids are driven from left to right, and the density is enhanced between the colloids which leads to a repelling force. In (b) they are driven from bottom to top, the bow wave effect in front of the rear colloid and the depletion behind the one in front are reduced, so the friction forces on the two colloids are reduced as well.

Image of FIG. 3.
FIG. 3.

Friction force of ideal solute particles on one of the two colloids driven side by side to first order in . The horizontal line at is the limit for . The same force applies to a colloid which is driven parallel to a planar wall at distance .

Image of FIG. 4.
FIG. 4.

Repelling force of ideal solute particles between two colloids driven side by side with velocity . The same force acts on a colloid which is driven parallel to a planar wall at distance .

Image of FIG. 5.
FIG. 5.

Repelling force of ideal solute particles between two colloids driven side by side at distance . The same force acts on a colloid which is driven parallel to a planar wall at distance .

Image of FIG. 6.
FIG. 6.

Friction force induced by the solute particles on one of two colloids driven behind each other to first order in . The horizontal line is the limit for , i.e., the friction force for a single colloid.

Image of FIG. 7.
FIG. 7.

Friction forces induced by solute particles on the two colloids driven behind each other for . The limit of (i.e., the force on a single colloid) is given by .

Image of FIG. 8.
FIG. 8.

Contour plots of the stationary density of ideal solute particles for a colloid driven from left to right parallel to a wall at distance (a) and (b) . (a) is exactly the upper half of Fig. 2(a).

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/content/aip/journal/jcp/127/3/10.1063/1.2753481
2007-07-20
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Colloid-colloid and colloid-wall interactions in driven suspensions
http://aip.metastore.ingenta.com/content/aip/journal/jcp/127/3/10.1063/1.2753481
10.1063/1.2753481
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