Microfluidic capturing-dynamics of paramagnetic bead suspensions

Details Microfluidic capturing-dynamics of paramagnetic bead suspensions Microfluidic capturing-dynamics of paramagnetic bead suspensions

2005-05-06

arxiv.org/abs/physics/0505052v1

Lab Chip, 5, 1293--1297 (2005)

Physics

Fluid Dynamics

4 pages including 5 figures

Scientific paper

10.1039/b507104f

We study theoretically the capturing of paramagnetic beads by a magnetic field gradient in a microfluidic channel treating the beads as a continuum. Bead motion is affected by both fluidic and magnetic forces. The transfer of momentum from beads to the fluid creates an effective bead-bead interaction that greatly aids capturing. We demonstrate that for a given inlet flow speed a critical density of beads exists above which complete capturing takes place.

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