Microfluidic capturing-dynamics of paramagnetic bead suspensions |
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Authors: | Mikkelsen Christian Bruus Henrik |
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Institution: | MIC-Department of Micro and Nanotechnology, Technical University of Denmark, DTU-Bldg. 345 east, DK-2800 Kongens Lyngby, Denmark. |
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Abstract: | 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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