Fig. 2

Aerotactic band formation predicted by the model. Top row: With parameters of Table 1. The band forms and stabilizes within a minute, and remains steady, exactly as observed in experiments. Band location and width are 406 μm and 132 μm, in excellent agreement with the experimentally measured values of 407 and 132 μm. Bottom row: With parameter values taken from Mazzag et al. [15]. The band is moving (not steady); location and width are 1517 and 185 μm at 300 s, but 1760 and 186 μm at 600 s. (a),(c): Band evolution in time: Left (blue) and Right (red) sides of the band. Note the different scales on x-axis. (b),(d): Profiles of (normalized) bacteria concentration (B) at time 50 s (blue) and 300 s (red), and of Oxygen concentration (C) at 300 s (green). Note the different scales on both axes