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Updated: Mar 21, 2026

Quantifying Bacterial Surface Swarming Motility on Inducer Gradient Plates
Published on: January 5, 2022
Purely hydrodynamic origin for swarming of swimming particles
Norihiro Oyama1, John Jairo Molina1, Ryoichi Yamamoto1
1Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan.
Abstract:
Three-dimensional simulations with fully resolved hydrodynamics are performed to study the collective motion of model swimmers in bulk and confinement. Calculating the dynamic structure factor, we clarified that the swarming in bulk systems can be understood as a pseudoacoustic mode. Under confinement between flat parallel walls, this pseudoacoustic mode leads to a traveling wavelike motion. This swarming behavior is due purely to the hydrodynamic interactions between the swimmers and depends strongly on the type and strength of swimming (i.e., pusher or puller).
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