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Friction-enhanced lifetime of bundled quantum vortices

Lookup NU author(s): Dr Luca Galantucci, Professor Carlo Barenghi

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Abstract

© 2023 American Physical Society. We show that a toroidal bundle of quantized vortex rings in superfluid helium generates a large-scale wake in the normal fluid which reduces the overall friction experienced by the bundle, thus greatly enhancing its lifetime, as observed in experiments. This collective effect is similar to the drag reduction observed in systems of active, hydrodynamically cooperative agents such as bacteria in aqueous suspensions, fungal spores in the atmosphere, and cyclists in pelotons.

Publication metadata

Author(s): Galantucci L, Krstulovic G, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review Fluids

Year: 2023

Volume: 8

Issue: 1

Online publication date: 19/01/2023

Acceptance date: 09/12/2022

ISSN (electronic): 2469-990X

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevFluids.8.014702

DOI: 10.1103/PhysRevFluids.8.014702

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