Fig. 4.

DES of bacterial growth for the pressure-independent growth condition (model C1) in channels with different aspect ratios, varying in the range A = 2–4. For each aspect ratio, we show the time evolution of the total number of cells within the channel (A), the pressure in the middle of the channel (B), the mean velocity gradient (C), and the averaged order parameter (D). (D Inset) The decay of the asymptotic value of the order parameter with the aspect ratio, A. Time is measured in units of the inverse growth rate.