Velocity shear effect on Rayleigh-Taylor vortices in nonuniform magnetized plasmas

Chakrabarti, Nikhil ; Kaw, P. K. (1996) Velocity shear effect on Rayleigh-Taylor vortices in nonuniform magnetized plasmas Physics of Plasmas, 3 (10). pp. 3599-3603. ISSN 1070-664X

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Official URL: http://pop.aip.org/resource/1/phpaen/v3/i10/p3599_...

Related URL: http://dx.doi.org/10.1063/1.871951

Abstract

In this paper, the effect of velocity shear on Rayleigh-Taylor vortices has been demonstrated. An inhomogeneous plasma is considered with a density profile such that the diamagnetic drift velocity Vn=(cTe/eB)dn0/dx is a constant and includes the effect of an ambient poloidal shear flow Veq(x)=V⊥0'(x-x0)y. The final equation describing the stationary Rayleigh-Taylor vortex is shown to have the structure of a nonlinear Poisson equation, where the nonlinearity arises essentially because of the velocity shear term. This equation has been solved numerically and it has been shown that qualitatively new two-dimensional monopole vortex solutions may be obtained in the appropriate parameter space. Therefore, a new important nonlinear effect related to equilibrium shear flow has been identified in the calculations of Rayleigh-Taylor vortices which results in monopole-like solutions in plasmas.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:25171
Deposited On:01 Dec 2010 12:00
Last Modified:04 Jun 2011 04:00

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