Numerical linearized MHD model of flapping oscillations

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Numerical linearized MHD model of flapping oscillations. / Korovinskiy, D. B.; Ivanov, I. B.; Semenov, V. S.; Erkaev, N. V.; Kiehas, S. A.

In: Physics of Plasmas, Vol. 23, No. 6, 062905, 01.06.2016.

Research output: Contribution to journal › Article › peer-review

Author

Korovinskiy, D. B. ; Ivanov, I. B. ; Semenov, V. S. ; Erkaev, N. V. ; Kiehas, S. A. / Numerical linearized MHD model of flapping oscillations. In: Physics of Plasmas. 2016 ; Vol. 23, No. 6.

BibTeX

@article{f69b1bd5fef24f049dc3213a8421d9b6,

title = "Numerical linearized MHD model of flapping oscillations",

abstract = "Kink-like magnetotail flapping oscillations in a Harris-like current sheet with earthward growing normal magnetic field component Bz are studied by means of time-dependent 2D linearized MHD numerical simulations. The dispersion relation and two-dimensional eigenfunctions are obtained. The results are compared with analytical estimates of the double-gradient model, which are found to be reliable for configurations with small Bz up to values ∼ 0.05 of the lobe magnetic field. Coupled with previous results, present simulations confirm that the earthward/tailward growth direction of the Bz component acts as a switch between stable/unstable regimes of the flapping mode, while the mode dispersion curve is the same in both cases. It is confirmed that flapping oscillations may be triggered by a simple Gaussian initial perturbation of the Vz velocity.",

author = "Korovinskiy, {D. B.} and Ivanov, {I. B.} and Semenov, {V. S.} and Erkaev, {N. V.} and Kiehas, {S. A.}",

year = "2016",

month = jun,

day = "1",

doi = "10.1063/1.4954388",

language = "English",

volume = "23",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "6",

}

RIS

TY - JOUR

T1 - Numerical linearized MHD model of flapping oscillations

AU - Korovinskiy, D. B.

AU - Ivanov, I. B.

AU - Semenov, V. S.

AU - Erkaev, N. V.

AU - Kiehas, S. A.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Kink-like magnetotail flapping oscillations in a Harris-like current sheet with earthward growing normal magnetic field component Bz are studied by means of time-dependent 2D linearized MHD numerical simulations. The dispersion relation and two-dimensional eigenfunctions are obtained. The results are compared with analytical estimates of the double-gradient model, which are found to be reliable for configurations with small Bz up to values ∼ 0.05 of the lobe magnetic field. Coupled with previous results, present simulations confirm that the earthward/tailward growth direction of the Bz component acts as a switch between stable/unstable regimes of the flapping mode, while the mode dispersion curve is the same in both cases. It is confirmed that flapping oscillations may be triggered by a simple Gaussian initial perturbation of the Vz velocity.

AB - Kink-like magnetotail flapping oscillations in a Harris-like current sheet with earthward growing normal magnetic field component Bz are studied by means of time-dependent 2D linearized MHD numerical simulations. The dispersion relation and two-dimensional eigenfunctions are obtained. The results are compared with analytical estimates of the double-gradient model, which are found to be reliable for configurations with small Bz up to values ∼ 0.05 of the lobe magnetic field. Coupled with previous results, present simulations confirm that the earthward/tailward growth direction of the Bz component acts as a switch between stable/unstable regimes of the flapping mode, while the mode dispersion curve is the same in both cases. It is confirmed that flapping oscillations may be triggered by a simple Gaussian initial perturbation of the Vz velocity.

UR - http://www.scopus.com/inward/record.url?scp=84977489543&partnerID=8YFLogxK

U2 - 10.1063/1.4954388

DO - 10.1063/1.4954388

M3 - Article

VL - 23

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 6

M1 - 062905

ER -

ID: 7628135