Experimental Signature of the Pair-Trajectories of Rough Spheres in the Shear-Induced Microstructure in Non-Colloidal Suspensions

Frédéric Blanc (1) , François Peters (1) , Elisabeth Lemaire (1)

1 LPMC - Laboratoire de physique de la matière condensée

The shear-induced microstructure in a semi-dilute non-colloidal 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 tra jectories.

Mots clés: suspensions; non-Brownian; roughness; microstructure; rheology; pair distribution function

Domaines: Dynamique des Fluides [physics.flu-dyn]

Frédéric Blanc, François Peters, Elisabeth Lemaire. Experimental Signature of the Pair-Trajectories of Rough Spheres in the Shear-Induced Microstructure in Non-Colloidal Suspensions. Physical Review Letters, 2011, 107, pp.208302. ⟨10.1103/PhysRevLett.107.208302⟩. ⟨hal-00645540⟩