Interactions between vortex and magnetic rings at high kinetic and magnetic Reynolds numbers

Research output: Contribution to journalLetter

Abstract

Interactions between magnetic and vortex rings are studied over a wide interval of interaction parameter values ranging from negligible magnetic effects on vorticity structure, to very strong effects. The employed interaction parameter measures the strength of the Lorentz force in units of the inertial force. At small interaction parameters, the vortex ring shapes part of the magnetic ring into a dissipative, curved, magnetic sheet structure. At high interaction parameters, the Lorentz force acts as an agent of proliferation of vortex rings, since it generates two vortex rings adjacent to the original magnetic structure, one of which is pulled (together with the advected magnetic field) into the wake of the original vortex ring, while the other escapes, ready to interact with another magnetic ring. Once within the initial vortex ring wake, both magnetic and vorticity structures are stretched into spirals, whilst the Lorentz force continuously generates new, intense vorticity at high magnetic field sites.

LanguageEnglish
Pages1601-1606
Number of pages6
JournalPhysics Letters A
Volume383
Issue number14
Early online date12 Feb 2019
DOIs
Publication statusPublished - 9 May 2019

Fingerprint

vortex rings
Reynolds number
rings
Lorentz force
kinetics
vorticity
interactions
wakes
magnetic effects
magnetic fields
inertia
escape
intervals

Keywords

  • fluid-magnetic field interactions
  • magnetic tubes
  • vortices

Cite this

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title = "Interactions between vortex and magnetic rings at high kinetic and magnetic Reynolds numbers",
abstract = "Interactions between magnetic and vortex rings are studied over a wide interval of interaction parameter values ranging from negligible magnetic effects on vorticity structure, to very strong effects. The employed interaction parameter measures the strength of the Lorentz force in units of the inertial force. At small interaction parameters, the vortex ring shapes part of the magnetic ring into a dissipative, curved, magnetic sheet structure. At high interaction parameters, the Lorentz force acts as an agent of proliferation of vortex rings, since it generates two vortex rings adjacent to the original magnetic structure, one of which is pulled (together with the advected magnetic field) into the wake of the original vortex ring, while the other escapes, ready to interact with another magnetic ring. Once within the initial vortex ring wake, both magnetic and vorticity structures are stretched into spirals, whilst the Lorentz force continuously generates new, intense vorticity at high magnetic field sites.",
keywords = "fluid-magnetic field interactions, magnetic tubes, vortices",
author = "Demosthenes Kivotides",
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language = "English",
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Interactions between vortex and magnetic rings at high kinetic and magnetic Reynolds numbers. / Kivotides, Demosthenes.

In: Physics Letters A, Vol. 383, No. 14, 09.05.2019, p. 1601-1606.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Interactions between vortex and magnetic rings at high kinetic and magnetic Reynolds numbers

AU - Kivotides, Demosthenes

PY - 2019/5/9

Y1 - 2019/5/9

N2 - Interactions between magnetic and vortex rings are studied over a wide interval of interaction parameter values ranging from negligible magnetic effects on vorticity structure, to very strong effects. The employed interaction parameter measures the strength of the Lorentz force in units of the inertial force. At small interaction parameters, the vortex ring shapes part of the magnetic ring into a dissipative, curved, magnetic sheet structure. At high interaction parameters, the Lorentz force acts as an agent of proliferation of vortex rings, since it generates two vortex rings adjacent to the original magnetic structure, one of which is pulled (together with the advected magnetic field) into the wake of the original vortex ring, while the other escapes, ready to interact with another magnetic ring. Once within the initial vortex ring wake, both magnetic and vorticity structures are stretched into spirals, whilst the Lorentz force continuously generates new, intense vorticity at high magnetic field sites.

AB - Interactions between magnetic and vortex rings are studied over a wide interval of interaction parameter values ranging from negligible magnetic effects on vorticity structure, to very strong effects. The employed interaction parameter measures the strength of the Lorentz force in units of the inertial force. At small interaction parameters, the vortex ring shapes part of the magnetic ring into a dissipative, curved, magnetic sheet structure. At high interaction parameters, the Lorentz force acts as an agent of proliferation of vortex rings, since it generates two vortex rings adjacent to the original magnetic structure, one of which is pulled (together with the advected magnetic field) into the wake of the original vortex ring, while the other escapes, ready to interact with another magnetic ring. Once within the initial vortex ring wake, both magnetic and vorticity structures are stretched into spirals, whilst the Lorentz force continuously generates new, intense vorticity at high magnetic field sites.

KW - fluid-magnetic field interactions

KW - magnetic tubes

KW - vortices

U2 - 10.1016/j.physleta.2019.02.012

DO - 10.1016/j.physleta.2019.02.012

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T2 - Physics Letters A

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SN - 0375-9601

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