Fig. 3: Velocity profile analysis in a rectangular microfluidic channel.

a Contour plots representing the theoretical velocity profiles calculated using the Cornish equation53. Each row corresponds to a different shear rate value indicated by the black lines headers, while the colour legend is provided on the left side. b Average velocity values calculated fixing the y position at 0 μm at the centre of the channel where lateral wall effect on flow is negligible. The theoretical values are represented with the continuous black line, microparticles velocities are in blue, and bacterial velocities at various time points are represented by histograms. c Velocity of average cell displacement along the x-flow direction. Data are reported with the same legend of column b. d Velocity of average cell displacement in the direction orthogonal to the flow. Data are reported with the same legend of column b.