Scattering of Line-Ring Vortices in a Superfluid

Villois, Alberto, Salman, Hayder and Proment, Davide (2015) Scattering of Line-Ring Vortices in a Superfluid. Journal of Low Temperature Physics, 180 (1-2). pp. 68-81. ISSN 0022-2291

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Abstract

We study the scattering of vortex rings by a superfluid line vortex using the Gross-Pitaevskii equation in a parameter regime where a hydrodynamic description based on a vortex filament approximation is applicable. By using a vortex extraction algorithm, we are able to track the location of the vortex ring as a function of time. Using this, we show that the scattering of the vortex ring in our Gross-Pitaevskii simulations is well captured by the local induction approximation of a vortex filament model for a wide range of impact parameters. The scattering of a vortex ring by a line vortex is characterised by the initial offset of the centre of the ring from the axis of the vortex. We find that a strong asymmetry exists in the scattering of a ring as a function of this initial scattering parameter.

Item Type: Article
Uncontrolled Keywords: physics.flu-dyn,cond-mat.other
Faculty \ School: Faculty of Science > School of Mathematics
Depositing User: Pure Connector
Date Deposited: 24 Jul 2015 20:56
Last Modified: 07 Nov 2020 00:41
URI: https://ueaeprints.uea.ac.uk/id/eprint/53520
DOI: 10.1007/s10909-015-1293-y

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