Purely hydrodynamic origin for swarming of swimming particles.
basic_science · Level V
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- Record sourced from PubMed, PMID 27176397.
- Also identified by DOI 10.1103/PhysRevE.93.043114.
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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).