Tuesday, February 26, 2013

1302.5924 (Xavier Grandchamp et al.)

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

Xavier Grandchamp, Gwennou Coupier, Aparna Srivastav, Christophe Minetti, Thomas Podgorski
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.
View original: http://arxiv.org/abs/1302.5924

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