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Article Dans Une Revue Physical Review Letters Année : 2013

Lift and down-gradient shear-induced diffusion in Red Blood Cell suspensions

Résumé

The distribution of Red Blood Cells in a confined channel flow is inhomogeneous and shows a marked depletion near the walls due to a competition between migration away from the walls and shear-induced diffusion resulting from interactions between particles. We investigated the lift of RBCs in a shear flow near a wall and measured a significant lift velocity despite the tumbling motion of cells. We also provide values for the collective and anisotropic shear-induced diffusion of a cloud of RBCs, both in the direction of shear and in the direction of vorticity. A generic down-gradient subdiffusion characterized by an exponent 1/3 is highlighted.

Dates et versions

hal-00809337 , version 1 (09-04-2013)

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Xavier Grandchamp, Gwennou Coupier, Aparna Srivastav, Christophe Minetti, Thomas Podgorski. Lift and down-gradient shear-induced diffusion in Red Blood Cell suspensions. Physical Review Letters, 2013, 110, pp.108101. ⟨10.1103/PhysRevLett.110.108101⟩. ⟨hal-00809337⟩
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