Figure 1.
(A) The schematic illustration of particle focusing in straight rectangular microchannels. Particles that are initially dispersed will gradually migrate to their equilibrium positions and remain well-focused and stable due to the balance of opposing forces related to the shear gradient lift (FS) and wall interaction lift (FW) forces. (B) Schematic of spiral microchannels. Dean flow generates two counter-rotating vortices perpendicular to the main flow direction. (C) Schematic of a cross-sectional view of the channels used in this work.