Fig. 3
From: Oscillatory surface rheotaxis of swimming E. coli bacteria
Characterisation of the four different surface rheotaxis regimes. Shown are simulated trajectories in the laboratory frame (upper panels) and the corresponding orientation dynamics (lower panels) with increasing shear rate: a (I, \(\dot \gamma = 1\,{\mathrm{s}}^{ - 1}\)) Circular swimming with a bias to the right. b (II, \(\dot \gamma = 5\,{\mathrm{s}}^{ - 1}\)) Upstream motion. c (III, \(\dot \gamma = 25\,{\mathrm{s}}^{ - 1}\)) Oscillatory motion, increasingly more to the right. d (IV, \(\dot \gamma = 60\,{\mathrm{s}}^{ - 1}\)) Coexistence between swimming to the right and to the left, with dynamical switching between these. Black circles indicate the initial swimmer positions. The parameters used are given in the caption of Fig. 1
