期刊
PHYSICA SCRIPTA
卷 62, 期 5, 页码 409-412出版社
ROYAL SWEDISH ACAD SCIENCES
DOI: 10.1238/Physica.Regular.062a00409
关键词
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Nonlinear equations governing the dynamics of finite amplitude drift-acoustic-waves are derived, taking into account sheared ion flows. A new class of stationary solution of the nonlinear equations can be represented in the form of a counter-rotating vortex. The latter appears in those parameter regimes in which the formation of a dipolar vortex is forbidden. For a large perpendicular ion velocity shear parameter, a counter-rotating vortex is similar to a vortex chain. The newly found counter-rotating vortex can be correlated with coherent nonlinear structures that are observed in association with sheared plasma flows in space and laboratory environments.
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