Self-Sustained Density Oscillations of Swimming Bacteria Confined in Microchambers

Autor: Paoluzzi, M., Di Leonardo, R., Angelani, L.
Rok vydání: 2014
Předmět:
Zdroj: Phys. Rev. Lett. 115, 188303 (2015)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.115.188303
Popis: We numerically study the dynamics of run-and-tumble particles confined in two chambers connected by thin channels. Two dominant dynamical behaviors emerge: (i) an oscillatory pumping state, in which particles periodically fill the two vessels and (ii) a circulating flow state, dynamically maintaining a near constant population level in the containers when connected by two channels. We demonstrate that the oscillatory behaviour arises from the combination of a narrow channel, preventing bacteria reorientation, and a density dependent motility inside the chambers.
Databáze: arXiv