# Universal and nonuniversal aspects of vortex reconnections in superfluids

Villois, Alberto, Proment, Davide ORCID: https://orcid.org/0000-0002-9472-0097 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 of Science > School of Mathematics Pure Connector 09 Mar 2017 01:42 22 Oct 2022 02:25 https://ueaeprints.uea.ac.uk/id/eprint/62917 10.1103/PhysRevFluids.2.044701

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