Tornado model for a magnetised plasma

Onishchenko, O. G.; Fedun, V.; Smolyakov, Andrei; Horton, Wendell; Pokhotelov, O. A.; Verth, G.

doi:10.1063/1.5023167

Title: Tornado model for a magnetised plasma

Journal Article · Tue May 08 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5023167· OSTI ID:1547339

Onishchenko, O. G. ^[1];

^[2];

^[3];

^[4]; Pokhotelov, O. A. ^[5]; Verth, G. ^[2]

Inst. of Physics of the Earth, Moscow (Russia); Space Research Inst., Moscow (Russia)
Univ. of Sheffield (United Kingdom)
Univ. of Saskatchewan, Saskatoon, SK (Canada)
Univ. of Texas, Austin, TX (United States)
Inst. of Physics of the Earth, Moscow (Russia)

A novel analytical model of axially-symmetric magnetic vortices with both a twisted fluid flow and a magnetic field is introduced. The exact solution for the three-dimensional structure of the fluid velocity and the magnetic field is obtained within the framework of the ideal magnetohydrodynamic equations for an incompressible fluid in a gravitational field. A quasi-stationary localised vortex arises when the radial flow that tends to concentrate vorticity in a narrow column around the axis of symmetry is balanced by the vertical vortex advection in the axial direction. The explicit expressions for the velocity and magnetic field components are obtained. The proposed analytic model may be used to parameterise the observed solar tornadoes and can provide a new indirect way for estimating magnetic twist from the observed azimuthal velocity profiles.

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Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-04ER54742

OSTI ID:: 1547339

Journal Information:: Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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References (19)

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