Fig. 5
From: Enhanced propagation of motile bacteria on surfaces due to forward scattering
Comparison between experiments and numerical simulations. a–c Simulated average effective propagation distance Leff, normalised average effective propagation speed Veff and average change in effective propagation direction ΔΘeff as a function of the obstacle density ρ for chiral active particles self-propelling through a circular area of radius R = 25 μm containing obstacles distributed at random without overlap (Supplementary Fig. 5a). The particles self-propel in the presence of a all three cell–obstacle interaction terms (R: repulsive interaction; FS: forward scattering; TC: tumble-collisions), b without tumble-collisions (TC) and c with repulsion (R) alone (Methods). Each value is obtained from averaging over 3000 different trajectories. The shaded area around the mean values of Leff and Veff represents one standard deviation. The solid line connecting the values of ΔΘeff is a guide for the eyes. The corresponding probability distributions of the change in effective propagation direction Δθeff are shown in Supplementary Fig. 6. The corresponding experimental values (Figs. 1 and 2) are shown for reference (circles). Supplementary Figure 7 shows simulations where only repulsion (R) and tumble-collisions (TC) are considered
