Dynamics of nonstationary dipole vortices

J.S. Hesthaven; Jens-Peter Lynov; J. Nycander

doi:10.1063/1.858648

Dynamics of nonstationary dipole vortices

J.S. Hesthaven, Jens-Peter Lynov, J. Nycander

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The dynamics of tilted dipole vortices in the equivalent barotropic vorticity (or Hasegawa-Mima) equation is studied. A recent theory is compared with numerical simulations and found to describe the short time behavior of dipole vortices well. In the long time limit the dipoles are found to either disintegrate or relax toward a steady eastward propagating dipole vortex. This relaxation is a consequence of nonviscous enstrophy loss by the dipole vortex.

Original language	English
Journal	Physics of Fluids
Volume	A 5
Issue number	3
Pages (from-to)	622-629
ISSN	1070-6631
DOIs	https://doi.org/10.1063/1.858648
Publication status	Published - 1993

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title = "Dynamics of nonstationary dipole vortices",

abstract = "The dynamics of tilted dipole vortices in the equivalent barotropic vorticity (or Hasegawa-Mima) equation is studied. A recent theory is compared with numerical simulations and found to describe the short time behavior of dipole vortices well. In the long time limit the dipoles are found to either disintegrate or relax toward a steady eastward propagating dipole vortex. This relaxation is a consequence of nonviscous enstrophy loss by the dipole vortex. ",

keywords = "Fremtidig energiteknologi",

author = "J.S. Hesthaven and Jens-Peter Lynov and J. Nycander",

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T1 - Dynamics of nonstationary dipole vortices

AU - Hesthaven, J.S.

AU - Lynov, Jens-Peter

AU - Nycander, J.

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N2 - The dynamics of tilted dipole vortices in the equivalent barotropic vorticity (or Hasegawa-Mima) equation is studied. A recent theory is compared with numerical simulations and found to describe the short time behavior of dipole vortices well. In the long time limit the dipoles are found to either disintegrate or relax toward a steady eastward propagating dipole vortex. This relaxation is a consequence of nonviscous enstrophy loss by the dipole vortex.

AB - The dynamics of tilted dipole vortices in the equivalent barotropic vorticity (or Hasegawa-Mima) equation is studied. A recent theory is compared with numerical simulations and found to describe the short time behavior of dipole vortices well. In the long time limit the dipoles are found to either disintegrate or relax toward a steady eastward propagating dipole vortex. This relaxation is a consequence of nonviscous enstrophy loss by the dipole vortex.

KW - Fremtidig energiteknologi

U2 - 10.1063/1.858648

DO - 10.1063/1.858648

M3 - Journal article

SN - 1070-6631

VL - A 5

SP - 622

EP - 629

JO - Physics of Fluids

JF - Physics of Fluids

IS - 3

ER -

Dynamics of nonstationary dipole vortices

Abstract

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