Universal and nonuniversal aspects of vortex reconnections in superfluids

Villois, Alberto, Proment, Davide and Krstulovic, Giorgio (2017) Universal and nonuniversal aspects of vortex reconnections in superfluids. Physical Review Fluids, 2 (4). ISSN 2469-990X

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Abstract

Insight into vortex reconnections in superfluids is presented, making use of analytical results and numerical simulations of the Gross-Pitaevskii model. Universal aspects of the reconnection process are investigated by considering different initial vortex configurations and making use of a recently developed tracking algorithm to reconstruct the vortex filaments. We show that during a reconnection event the vortex lines approach and separate always according to the time scaling $ \delta \sim t^{1/2} $ with prefactors that depend on the vortex configuration. We also investigate the behavior of curvature and torsion close to the reconnection point, demonstrating analytically that the curvature can exhibit a self-similar behavior that might be broken by the development of shocklike structures in the torsion.

Item Type: Article
Faculty \ School: Faculty of Science > School of Mathematics
Depositing User: Pure Connector
Date Deposited: 09 Mar 2017 01:42
Last Modified: 27 Jul 2020 23:56
URI: https://ueaeprints.uea.ac.uk/id/eprint/62917
DOI: 10.1103/PhysRevFluids.2.044701

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