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Phys Rev Lett. 2011 Nov 11;107(20):208302. Epub 2011 Nov 8.

Experimental signature of the pair trajectories of rough spheres in the shear-induced microstructure in noncolloidal suspensions.

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CNRS, Université de Nice, LPMC-UMR, France.


The shear-induced microstructure in a semidilute noncolloidal suspension is studied. A high-resolution pair distribution function in the plane of shear is experimentally determined. It is shown to be anisotropic, with a depleted direction close to the velocity axis in the recession quadrant. The influence of roughness on the interaction between particles is quantitatively evidenced. The experimental results compare well with a model from particle pair trajectories.

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