Lift and down-gradient shear-induced diffusion in Red Blood Cell suspensions
Biological Physics
2015-06-15 v1 Soft Condensed Matter
Fluid Dynamics
Abstract
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.
Cite
@article{arxiv.1302.5924,
title = {Lift and down-gradient shear-induced diffusion in Red Blood Cell suspensions},
author = {Xavier Grandchamp and Gwennou Coupier and Aparna Srivastav and Christophe Minetti and Thomas Podgorski},
journal= {arXiv preprint arXiv:1302.5924},
year = {2015}
}
Comments
To appear in Phys. Rev. Lett