期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.258101
关键词
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资金
- EPSRC [EP/E030173, EP/H027254]
- Royal Society
- EPSRC [EP/E030173/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E030173/1] Funding Source: researchfish
We simulate by lattice Boltzmann the nonequilibrium steady states of run-and-tumble particles (inspired by a minimal model of bacteria), interacting by far-field hydrodynamics, subject to confinement. Under gravity, hydrodynamic interactions barely perturb the steady state found without them, but for particles in a harmonic trap such a state is quite changed if the run length is larger than the confinement length: a self-assembled pump is formed. Particles likewise confined in a narrow channel show a generic upstream flux in Poiseuille flow: chiral swimming is not required.
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